From e62783efd933ec39a2bfda5833dd11008bcf704a Mon Sep 17 00:00:00 2001
From: Linus Gasser <linus.gasser@epfl.ch>
Date: Fri, 11 Feb 2022 14:26:53 +0100
Subject: [PATCH 1/3] Add the TSM identity to Darc

The Trusted Secure Module is used by DuoKey to sign messages using a threshold signature
scheme. This PR adds support for Darcs to verify those messages. It is used for the
Master Thesis protject of Pilar Marxer.
---
 darc/darc.go                                  |  138 +-
 darc/darc_test.go                             |   39 +-
 darc/expression/expression.go                 |    4 +-
 darc/proto.go                                 |   11 +
 .../ch/epfl/dedis/lib/proto/DarcProto.java    | 1256 ++++++++++++++---
 .../js/cothority/src/protobuf/models.json     |    2 +-
 external/proto/darc.proto                     |    7 +
 7 files changed, 1228 insertions(+), 229 deletions(-)

diff --git a/darc/darc.go b/darc/darc.go
index 3a8506a79a..30c6814157 100644
--- a/darc/darc.go
+++ b/darc/darc.go
@@ -33,6 +33,8 @@ package darc
 import (
 	"bytes"
 	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
 	"crypto/sha256"
 	"crypto/sha512"
 	"crypto/x509"
@@ -773,6 +775,10 @@ func (s Signer) Type() int {
 		return 3
 	case s.EvmContract != nil:
 		return 4
+	case s.DID != nil:
+		return 5
+	case s.tsm != nil:
+		return 6
 	default:
 		return -1
 	}
@@ -790,6 +796,8 @@ func (s Signer) Identity() Identity {
 		return NewIdentityProxy(s.Proxy)
 	case 4:
 		return NewIdentityEvmContract(s.EvmContract)
+	case 6:
+		return NewIdentityTSM(s.tsm.PrivateKey.PublicKey)
 	default:
 		return Identity{}
 	}
@@ -811,6 +819,8 @@ func (s Signer) Sign(msg []byte) ([]byte, error) {
 		return s.Proxy.Sign(msg)
 	case 4:
 		return s.EvmContract.Sign(msg)
+	case 6:
+		return s.tsm.Sign(msg)
 	default:
 		return nil, errors.New("unknown signer type")
 	}
@@ -821,7 +831,7 @@ func (s Signer) GetPrivate() (kyber.Scalar, error) {
 	switch s.Type() {
 	case 1:
 		return s.Ed25519.Secret, nil
-	case 0, 2, 3:
+	case 0, 2, 3, 4, 5, 6:
 		return nil, errors.New("signer lacks a private key")
 	default:
 		return nil, errors.New("signer is of unknown type")
@@ -845,6 +855,8 @@ func (id Identity) Equal(id2 *Identity) bool {
 		return id.Proxy.Equal(id2.Proxy)
 	case 4:
 		return id.EvmContract.Equal(id2.EvmContract)
+	case 6:
+		return bytes.Equal(id.TSM.PublicKey, id2.TSM.PublicKey)
 	}
 	return false
 }
@@ -863,6 +875,10 @@ func (id Identity) Type() int {
 		return 3
 	case id.EvmContract != nil:
 		return 4
+	case id.DID != nil:
+		return 5
+	case id.TSM != nil:
+		return 6
 	}
 	return -1
 }
@@ -870,19 +886,7 @@ func (id Identity) Type() int {
 // PrimaryIdentity returns true if the identity is a primary identity, which is
 // an identity that is associated with a concrete public/private key.
 func (id Identity) PrimaryIdentity() bool {
-	switch {
-	case id.Darc != nil:
-		return false
-	case id.Ed25519 != nil:
-		return true
-	case id.X509EC != nil:
-		return true
-	case id.Proxy != nil:
-		return true
-	case id.EvmContract != nil:
-		return true
-	}
-	return false
+	return id.Type() != 0
 }
 
 // TypeString returns the string of the type of the identity.
@@ -898,6 +902,10 @@ func (id Identity) TypeString() string {
 		return "proxy"
 	case 4:
 		return "evm_contract"
+	case 5:
+		return "did"
+	case 6:
+		return "tsm"
 	default:
 		return "No identity"
 	}
@@ -918,6 +926,14 @@ func (id Identity) String() string {
 		bevmString := hex.EncodeToString(id.EvmContract.BEvmID)
 		addrString := id.EvmContract.Address.Hex()
 		return fmt.Sprintf("%s:%s:%s", id.TypeString(), bevmString, addrString)
+	case 5:
+		return fmt.Sprintf("%s:%s", id.TypeString(), id.DID.DID)
+	case 6:
+		buf, err := id.TSM.MarshalBinary()
+		if err != nil {
+			panic("couldn't marshal TSM key: " + err.Error())
+		}
+		return fmt.Sprintf("%s:%x", id.TypeString(), buf)
 	default:
 		return "No identity"
 	}
@@ -937,6 +953,8 @@ func (id Identity) Verify(msg, sig []byte) error {
 		return id.Proxy.Verify(msg, sig)
 	case 4:
 		return id.EvmContract.Verify(msg, sig)
+	case 6:
+		return id.TSM.Verify(msg, sig)
 	default:
 		return errors.New("unknown identity")
 	}
@@ -964,6 +982,9 @@ func (id Identity) GetPublicBytes() []byte {
 		return buf
 	case 4:
 		return id.EvmContract.Address[:]
+	case 6:
+		buf := id.TSM.PublicKey
+		return buf
 	default:
 		return nil
 	}
@@ -1012,6 +1033,52 @@ func NewIdentityX509EC(public []byte) Identity {
 	}
 }
 
+// NewIdentityTSM creates a new TSM identity struct given a public key
+func NewIdentityTSM(ecKey ecdsa.PublicKey) Identity {
+	return Identity{
+		TSM: &IdentityTSM{
+			PublicKey: elliptic.MarshalCompressed(ecKey.Curve, ecKey.X,
+				ecKey.Y),
+			ecKey: &ecKey,
+		},
+	}
+}
+
+// GetPublic returns the public key of the Identity.
+// As it is stored in binary format, it might have to be converted.
+func (ide *IdentityTSM) GetPublic() ecdsa.PublicKey {
+	if ide.ecKey == nil {
+		ecKey := ecdsa.PublicKey{}
+		x, y := elliptic.UnmarshalCompressed(elliptic.P256(), ide.PublicKey)
+		ecKey.X = x
+		ecKey.Y = y
+		ecKey.Curve = elliptic.P256()
+		ide.ecKey = &ecKey
+	}
+	return *ide.ecKey
+}
+
+// Verify the signature of the identity.
+func (ide *IdentityTSM) Verify(msg []byte, sig []byte) error {
+	ecKey := ide.GetPublic()
+	valid := ecdsa.VerifyASN1(&ecKey, msg, sig)
+	if !valid {
+		return errors.New("Signature failed to verify")
+	}
+	return nil
+}
+
+// MarshalBinary returns the compressed public key
+func (ide IdentityTSM) MarshalBinary() ([]byte, error) {
+	return ide.PublicKey, nil
+}
+
+// UnmarshalBinary stores the compressed public key
+func (ide *IdentityTSM) UnmarshalBinary(data []byte) error {
+	ide.PublicKey = data
+	return nil
+}
+
 // NewIdentityProxy creates a new OpenID Connect identity struct.
 func NewIdentityProxy(s *SignerProxy) Identity {
 	return Identity{
@@ -1120,6 +1187,8 @@ func ParseIdentity(in string) (Identity, error) {
 		return parseIDProxy(fields[1])
 	case "evm_contract":
 		return parseIDEvmContract(fields[1])
+	case "tsm":
+		return parseIDTSM(fields[1])
 	default:
 		return Identity{}, fmt.Errorf("unknown identity type %v", fields[0])
 	}
@@ -1142,6 +1211,16 @@ func parseIDX509ec(in string) (Identity, error) {
 	return Identity{X509EC: &IdentityX509EC{Public: id}}, nil
 }
 
+func parseIDTSM(in string) (Identity, error) {
+	idTSM := IdentityTSM{}
+	_, err := hex.Decode(idTSM.PublicKey, []byte(in))
+	if err != nil {
+		return Identity{}, err
+	}
+
+	return Identity{TSM: &idTSM}, nil
+}
+
 func parseIDDarc(in string) (Identity, error) {
 	id := make([]byte, hex.DecodedLen(len(in)))
 	_, err := hex.Decode(id, []byte(in))
@@ -1447,6 +1526,37 @@ func (kcs SignerX509EC) Sign(msg []byte) ([]byte, error) {
 	return nil, errors.New("not yet implemented")
 }
 
+// SignerTSM holds the private key necessary to sign Darcs.
+// As this is only used in testing, it is not in proto.go and thus
+// not exported.
+type SignerTSM struct {
+	PrivateKey ecdsa.PrivateKey
+}
+
+// NewSignerTSM creates a tsm signer with a SECP256K1 key.
+// If a nil key is given, then a random key is generated.
+// This is mostly used for testing, as the real TSM is a hardware device
+// and not supported in tests.
+func NewSignerTSM(private ecdsa.PrivateKey) Signer {
+	if private.D == nil {
+		priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+		if err != nil {
+			panic("couldn't generate key: " + err.Error())
+		}
+		private = *priv
+	}
+	return Signer{tsm: &SignerTSM{
+		PrivateKey: private,
+	}}
+}
+
+// Sign the message with the private key.
+// This is not really possible with the TSM signer,
+// so this is mostly useful for testing.
+func (kcs SignerTSM) Sign(msg []byte) ([]byte, error) {
+	return ecdsa.SignASN1(rand.Reader, &kcs.PrivateKey, msg)
+}
+
 // NewSignerProxy creates a new SignerProxy. When Sign is called, the getSignature
 // callback will be called, so that the caller can use the appropriate mechanism
 // to retrieve and/or construct the signature.
diff --git a/darc/darc_test.go b/darc/darc_test.go
index 9f0cf289db..c907ab9450 100644
--- a/darc/darc_test.go
+++ b/darc/darc_test.go
@@ -1,8 +1,13 @@
 package darc
 
 import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/sha256"
+	"encoding/hex"
 	"errors"
 	"fmt"
+	"math/big"
 	"net/url"
 	"strings"
 	"testing"
@@ -754,7 +759,6 @@ func testIdentity(t *testing.T, sig Signer) {
 	msg := []byte("something secret")
 	signed, err := sig.Sign(msg)
 	require.NoError(t, err)
-
 	id := sig.Identity()
 	require.NoError(t, id.Verify(msg, signed))
 	require.Error(t, id.Verify([]byte("wrong message"), signed))
@@ -763,4 +767,37 @@ func testIdentity(t *testing.T, sig Signer) {
 // Test the different identities available - currently only Ed25519.
 func TestIdentities(t *testing.T) {
 	testIdentity(t, NewSignerEd25519(nil, nil))
+	testIdentity(t, NewSignerTSM(ecdsa.PrivateKey{}))
+}
+
+// Test a signature from the TSM
+func TestTSMSignature(t *testing.T) {
+	var x, _ = new(big.Int).SetString("25613385885653880697990944418179706546134037329992108968315147853972798913688", 10)
+	var y, _ = new(big.Int).SetString("74946767262888349555270609195205284686604880870734462312238891495596941025713", 10)
+	pk := ecdsa.PublicKey{
+		Curve: elliptic.P256(),
+		X:     x,
+		Y:     y,
+	}
+	id := NewIdentityTSM(pk)
+
+	msg := []byte(`Hello World`)
+	digest := sha256.Sum256(msg)
+
+	// Signature from code example go-tsm-sdk corresponding to tsm public
+	// key example
+	signed, _ := hex.DecodeString("304402204f0b20a44efacec7b0514683233a79552026fe80e468078f6fed6cfe3f3e8a0402201eb12db7f6fe0828cafe8b0a032a37ff377b342799cfe77cfbac40c8ec1fa9e8")
+
+	require.NoError(t, id.Verify(digest[:], signed))
+	require.Error(t, id.Verify([]byte("wrong message"), signed))
+}
+
+// Make sure Marshalling and Unmarshalling work
+func TestTSMMarshalling(t *testing.T) {
+	id := NewSignerTSM(ecdsa.PrivateKey{}).Identity()
+	buf, err := id.TSM.MarshalBinary()
+	require.NoError(t, err)
+	var id2 IdentityTSM
+	require.NoError(t, id2.UnmarshalBinary(buf))
+	require.True(t, id.Equal(&Identity{TSM: &id2}))
 }
diff --git a/darc/expression/expression.go b/darc/expression/expression.go
index 7dd5bff7da..cb99140b04 100644
--- a/darc/expression/expression.go
+++ b/darc/expression/expression.go
@@ -6,7 +6,7 @@ the syntax we use is from: https://en.wikipedia.org/wiki/Extended_Backus%E2%80%9
 	expr = term, [ '&', term ]*
 	term = factor, [ '|', factor ]*
 	factor = '(', expr, ')' | id | openid
-	identity = (darc|ed25519|x509ec):[0-9a-fA-F]+
+	identity = (darc|ed25519|x509ec|tsm):[0-9a-fA-F]+
 	proxy = proxy:[0-9a-fA-F]+:[^ \n\t]*
 	evm_identity = evm_contract:[0-9a-fA-F]+:0x[0-9a-fA-F]+
 	attr = attr:[0-9a-zA-Z\-\_]+:[^ \n\t]*
@@ -154,7 +154,7 @@ func (e Expr) AddAndElement(id string) Expr {
 func identity() parsec.Parser {
 	return func(s parsec.Scanner) (parsec.ParsecNode, parsec.Scanner) {
 		_, s = s.SkipAny(`^[ \n\t]+`)
-		p := parsec.Token(`(darc|ed25519|x509ec):[0-9a-fA-F]+`, "HEX")
+		p := parsec.Token(`(darc|ed25519|x509ec|tsm):[0-9a-fA-F]+`, "HEX")
 		return p(s)
 	}
 }
diff --git a/darc/proto.go b/darc/proto.go
index 2367065a22..db193764af 100644
--- a/darc/proto.go
+++ b/darc/proto.go
@@ -1,6 +1,8 @@
 package darc
 
 import (
+	"crypto/ecdsa"
+
 	"go.dedis.ch/cothority/v3/darc/expression"
 	"go.dedis.ch/kyber/v3"
 	"go.dedis.ch/onet/v3/network"
@@ -71,6 +73,8 @@ type Identity struct {
 	EvmContract *IdentityEvmContract
 	// A claim signed by one of the keys in a DID Doc
 	DID *IdentityDID
+	// Public-key identity from an ECDSA key
+	TSM *IdentityTSM
 }
 
 // IdentityEd25519 holds a Ed25519 public key (Point)
@@ -78,6 +82,12 @@ type IdentityEd25519 struct {
 	Point kyber.Point
 }
 
+// IdentityTSM holds a secp256k1 key (array of bytes)
+type IdentityTSM struct {
+	PublicKey []byte
+	ecKey     *ecdsa.PublicKey
+}
+
 // IdentityX509EC holds a public key from a X509EC
 type IdentityX509EC struct {
 	Public []byte
@@ -159,6 +169,7 @@ type Signer struct {
 	Proxy       *SignerProxy
 	EvmContract *SignerEvmContract
 	DID         *SignerDID
+	tsm         *SignerTSM
 }
 
 // SignerEd25519 holds a public and private keys necessary to sign Darcs
diff --git a/external/java/src/main/java/ch/epfl/dedis/lib/proto/DarcProto.java b/external/java/src/main/java/ch/epfl/dedis/lib/proto/DarcProto.java
index a5382a32d8..61709bb029 100644
--- a/external/java/src/main/java/ch/epfl/dedis/lib/proto/DarcProto.java
+++ b/external/java/src/main/java/ch/epfl/dedis/lib/proto/DarcProto.java
@@ -2589,6 +2589,33 @@ public interface IdentityOrBuilder extends
      * <code>optional .darc.IdentityDID did = 6;</code>
      */
     ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder getDidOrBuilder();
+
+    /**
+     * <pre>
+     * Public-key identity from an ECDSA key
+     * </pre>
+     *
+     * <code>optional .darc.IdentityTSM tsm = 7;</code>
+     * @return Whether the tsm field is set.
+     */
+    boolean hasTsm();
+    /**
+     * <pre>
+     * Public-key identity from an ECDSA key
+     * </pre>
+     *
+     * <code>optional .darc.IdentityTSM tsm = 7;</code>
+     * @return The tsm.
+     */
+    ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM getTsm();
+    /**
+     * <pre>
+     * Public-key identity from an ECDSA key
+     * </pre>
+     *
+     * <code>optional .darc.IdentityTSM tsm = 7;</code>
+     */
+    ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder getTsmOrBuilder();
   }
   /**
    * <pre>
@@ -2719,6 +2746,19 @@ private Identity(
               bitField0_ |= 0x00000020;
               break;
             }
+            case 58: {
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder subBuilder = null;
+              if (((bitField0_ & 0x00000040) != 0)) {
+                subBuilder = tsm_.toBuilder();
+              }
+              tsm_ = input.readMessage(ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(tsm_);
+                tsm_ = subBuilder.buildPartial();
+              }
+              bitField0_ |= 0x00000040;
+              break;
+            }
             default: {
               if (!parseUnknownField(
                   input, unknownFields, extensionRegistry, tag)) {
@@ -2980,6 +3020,44 @@ public ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder getDidOrBuilder()
       return did_ == null ? ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.getDefaultInstance() : did_;
     }
 
+    public static final int TSM_FIELD_NUMBER = 7;
+    private ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM tsm_;
+    /**
+     * <pre>
+     * Public-key identity from an ECDSA key
+     * </pre>
+     *
+     * <code>optional .darc.IdentityTSM tsm = 7;</code>
+     * @return Whether the tsm field is set.
+     */
+    @java.lang.Override
+    public boolean hasTsm() {
+      return ((bitField0_ & 0x00000040) != 0);
+    }
+    /**
+     * <pre>
+     * Public-key identity from an ECDSA key
+     * </pre>
+     *
+     * <code>optional .darc.IdentityTSM tsm = 7;</code>
+     * @return The tsm.
+     */
+    @java.lang.Override
+    public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM getTsm() {
+      return tsm_ == null ? ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance() : tsm_;
+    }
+    /**
+     * <pre>
+     * Public-key identity from an ECDSA key
+     * </pre>
+     *
+     * <code>optional .darc.IdentityTSM tsm = 7;</code>
+     */
+    @java.lang.Override
+    public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder getTsmOrBuilder() {
+      return tsm_ == null ? ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance() : tsm_;
+    }
+
     private byte memoizedIsInitialized = -1;
     @java.lang.Override
     public final boolean isInitialized() {
@@ -3023,6 +3101,12 @@ public final boolean isInitialized() {
           return false;
         }
       }
+      if (hasTsm()) {
+        if (!getTsm().isInitialized()) {
+          memoizedIsInitialized = 0;
+          return false;
+        }
+      }
       memoizedIsInitialized = 1;
       return true;
     }
@@ -3048,6 +3132,9 @@ public void writeTo(com.google.protobuf.CodedOutputStream output)
       if (((bitField0_ & 0x00000020) != 0)) {
         output.writeMessage(6, getDid());
       }
+      if (((bitField0_ & 0x00000040) != 0)) {
+        output.writeMessage(7, getTsm());
+      }
       unknownFields.writeTo(output);
     }
 
@@ -3081,6 +3168,10 @@ public int getSerializedSize() {
         size += com.google.protobuf.CodedOutputStream
           .computeMessageSize(6, getDid());
       }
+      if (((bitField0_ & 0x00000040) != 0)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(7, getTsm());
+      }
       size += unknownFields.getSerializedSize();
       memoizedSize = size;
       return size;
@@ -3126,6 +3217,11 @@ public boolean equals(final java.lang.Object obj) {
         if (!getDid()
             .equals(other.getDid())) return false;
       }
+      if (hasTsm() != other.hasTsm()) return false;
+      if (hasTsm()) {
+        if (!getTsm()
+            .equals(other.getTsm())) return false;
+      }
       if (!unknownFields.equals(other.unknownFields)) return false;
       return true;
     }
@@ -3161,6 +3257,10 @@ public int hashCode() {
         hash = (37 * hash) + DID_FIELD_NUMBER;
         hash = (53 * hash) + getDid().hashCode();
       }
+      if (hasTsm()) {
+        hash = (37 * hash) + TSM_FIELD_NUMBER;
+        hash = (53 * hash) + getTsm().hashCode();
+      }
       hash = (29 * hash) + unknownFields.hashCode();
       memoizedHashCode = hash;
       return hash;
@@ -3300,6 +3400,7 @@ private void maybeForceBuilderInitialization() {
           getProxyFieldBuilder();
           getEvmcontractFieldBuilder();
           getDidFieldBuilder();
+          getTsmFieldBuilder();
         }
       }
       @java.lang.Override
@@ -3341,6 +3442,12 @@ public Builder clear() {
           didBuilder_.clear();
         }
         bitField0_ = (bitField0_ & ~0x00000020);
+        if (tsmBuilder_ == null) {
+          tsm_ = null;
+        } else {
+          tsmBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000040);
         return this;
       }
 
@@ -3417,6 +3524,14 @@ public ch.epfl.dedis.lib.proto.DarcProto.Identity buildPartial() {
           }
           to_bitField0_ |= 0x00000020;
         }
+        if (((from_bitField0_ & 0x00000040) != 0)) {
+          if (tsmBuilder_ == null) {
+            result.tsm_ = tsm_;
+          } else {
+            result.tsm_ = tsmBuilder_.build();
+          }
+          to_bitField0_ |= 0x00000040;
+        }
         result.bitField0_ = to_bitField0_;
         onBuilt();
         return result;
@@ -3484,6 +3599,9 @@ public Builder mergeFrom(ch.epfl.dedis.lib.proto.DarcProto.Identity other) {
         if (other.hasDid()) {
           mergeDid(other.getDid());
         }
+        if (other.hasTsm()) {
+          mergeTsm(other.getTsm());
+        }
         this.mergeUnknownFields(other.unknownFields);
         onChanged();
         return this;
@@ -3521,6 +3639,11 @@ public final boolean isInitialized() {
             return false;
           }
         }
+        if (hasTsm()) {
+          if (!getTsm().isInitialized()) {
+            return false;
+          }
+        }
         return true;
       }
 
@@ -4439,45 +4562,743 @@ public Builder clearDid() {
        *
        * <code>optional .darc.IdentityDID did = 6;</code>
        */
-      public ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.Builder getDidBuilder() {
-        bitField0_ |= 0x00000020;
-        onChanged();
-        return getDidFieldBuilder().getBuilder();
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.Builder getDidBuilder() {
+        bitField0_ |= 0x00000020;
+        onChanged();
+        return getDidFieldBuilder().getBuilder();
+      }
+      /**
+       * <pre>
+       * A claim signed by one of the keys in a DID Doc
+       * </pre>
+       *
+       * <code>optional .darc.IdentityDID did = 6;</code>
+       */
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder getDidOrBuilder() {
+        if (didBuilder_ != null) {
+          return didBuilder_.getMessageOrBuilder();
+        } else {
+          return did_ == null ?
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.getDefaultInstance() : did_;
+        }
+      }
+      /**
+       * <pre>
+       * A claim signed by one of the keys in a DID Doc
+       * </pre>
+       *
+       * <code>optional .darc.IdentityDID did = 6;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+          ch.epfl.dedis.lib.proto.DarcProto.IdentityDID, ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder>
+          getDidFieldBuilder() {
+        if (didBuilder_ == null) {
+          didBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityDID, ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder>(
+                  getDid(),
+                  getParentForChildren(),
+                  isClean());
+          did_ = null;
+        }
+        return didBuilder_;
+      }
+
+      private ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM tsm_;
+      private com.google.protobuf.SingleFieldBuilderV3<
+          ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder> tsmBuilder_;
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       * @return Whether the tsm field is set.
+       */
+      public boolean hasTsm() {
+        return ((bitField0_ & 0x00000040) != 0);
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       * @return The tsm.
+       */
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM getTsm() {
+        if (tsmBuilder_ == null) {
+          return tsm_ == null ? ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance() : tsm_;
+        } else {
+          return tsmBuilder_.getMessage();
+        }
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      public Builder setTsm(ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM value) {
+        if (tsmBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          tsm_ = value;
+          onChanged();
+        } else {
+          tsmBuilder_.setMessage(value);
+        }
+        bitField0_ |= 0x00000040;
+        return this;
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      public Builder setTsm(
+          ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder builderForValue) {
+        if (tsmBuilder_ == null) {
+          tsm_ = builderForValue.build();
+          onChanged();
+        } else {
+          tsmBuilder_.setMessage(builderForValue.build());
+        }
+        bitField0_ |= 0x00000040;
+        return this;
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      public Builder mergeTsm(ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM value) {
+        if (tsmBuilder_ == null) {
+          if (((bitField0_ & 0x00000040) != 0) &&
+              tsm_ != null &&
+              tsm_ != ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance()) {
+            tsm_ =
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.newBuilder(tsm_).mergeFrom(value).buildPartial();
+          } else {
+            tsm_ = value;
+          }
+          onChanged();
+        } else {
+          tsmBuilder_.mergeFrom(value);
+        }
+        bitField0_ |= 0x00000040;
+        return this;
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      public Builder clearTsm() {
+        if (tsmBuilder_ == null) {
+          tsm_ = null;
+          onChanged();
+        } else {
+          tsmBuilder_.clear();
+        }
+        bitField0_ = (bitField0_ & ~0x00000040);
+        return this;
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder getTsmBuilder() {
+        bitField0_ |= 0x00000040;
+        onChanged();
+        return getTsmFieldBuilder().getBuilder();
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder getTsmOrBuilder() {
+        if (tsmBuilder_ != null) {
+          return tsmBuilder_.getMessageOrBuilder();
+        } else {
+          return tsm_ == null ?
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance() : tsm_;
+        }
+      }
+      /**
+       * <pre>
+       * Public-key identity from an ECDSA key
+       * </pre>
+       *
+       * <code>optional .darc.IdentityTSM tsm = 7;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+          ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder>
+          getTsmFieldBuilder() {
+        if (tsmBuilder_ == null) {
+          tsmBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder>(
+                  getTsm(),
+                  getParentForChildren(),
+                  isClean());
+          tsm_ = null;
+        }
+        return tsmBuilder_;
+      }
+      @java.lang.Override
+      public final Builder setUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.setUnknownFields(unknownFields);
+      }
+
+      @java.lang.Override
+      public final Builder mergeUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.mergeUnknownFields(unknownFields);
+      }
+
+
+      // @@protoc_insertion_point(builder_scope:darc.Identity)
+    }
+
+    // @@protoc_insertion_point(class_scope:darc.Identity)
+    private static final ch.epfl.dedis.lib.proto.DarcProto.Identity DEFAULT_INSTANCE;
+    static {
+      DEFAULT_INSTANCE = new ch.epfl.dedis.lib.proto.DarcProto.Identity();
+    }
+
+    public static ch.epfl.dedis.lib.proto.DarcProto.Identity getDefaultInstance() {
+      return DEFAULT_INSTANCE;
+    }
+
+    @java.lang.Deprecated public static final com.google.protobuf.Parser<Identity>
+        PARSER = new com.google.protobuf.AbstractParser<Identity>() {
+      @java.lang.Override
+      public Identity parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new Identity(input, extensionRegistry);
+      }
+    };
+
+    public static com.google.protobuf.Parser<Identity> parser() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<Identity> getParserForType() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public ch.epfl.dedis.lib.proto.DarcProto.Identity getDefaultInstanceForType() {
+      return DEFAULT_INSTANCE;
+    }
+
+  }
+
+  public interface IdentityEd25519OrBuilder extends
+      // @@protoc_insertion_point(interface_extends:darc.IdentityEd25519)
+      com.google.protobuf.MessageOrBuilder {
+
+    /**
+     * <code>required bytes point = 1;</code>
+     * @return Whether the point field is set.
+     */
+    boolean hasPoint();
+    /**
+     * <code>required bytes point = 1;</code>
+     * @return The point.
+     */
+    com.google.protobuf.ByteString getPoint();
+  }
+  /**
+   * <pre>
+   * IdentityEd25519 holds a Ed25519 public key (Point)
+   * </pre>
+   *
+   * Protobuf type {@code darc.IdentityEd25519}
+   */
+  public static final class IdentityEd25519 extends
+      com.google.protobuf.GeneratedMessageV3 implements
+      // @@protoc_insertion_point(message_implements:darc.IdentityEd25519)
+      IdentityEd25519OrBuilder {
+  private static final long serialVersionUID = 0L;
+    // Use IdentityEd25519.newBuilder() to construct.
+    private IdentityEd25519(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+      super(builder);
+    }
+    private IdentityEd25519() {
+      point_ = com.google.protobuf.ByteString.EMPTY;
+    }
+
+    @java.lang.Override
+    @SuppressWarnings({"unused"})
+    protected java.lang.Object newInstance(
+        UnusedPrivateParameter unused) {
+      return new IdentityEd25519();
+    }
+
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+    getUnknownFields() {
+      return this.unknownFields;
+    }
+    private IdentityEd25519(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      this();
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      int mutable_bitField0_ = 0;
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
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+      try {
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+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
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+              break;
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+              point_ = input.readBytes();
+              break;
+            }
+            default: {
+              if (!parseUnknownField(
+                  input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
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+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
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+     */
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+    @java.lang.Override
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
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+        output.writeBytes(1, point_);
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+      unknownFields.writeTo(output);
+    }
+
+    @java.lang.Override
+    public int getSerializedSize() {
+      int size = memoizedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (((bitField0_ & 0x00000001) != 0)) {
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+      size += unknownFields.getSerializedSize();
+      memoizedSize = size;
+      return size;
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+
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519)) {
+        return super.equals(obj);
+      }
+      ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 other = (ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519) obj;
+
+      if (hasPoint() != other.hasPoint()) return false;
+      if (hasPoint()) {
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+      int hash = 41;
+      hash = (19 * hash) + getDescriptor().hashCode();
+      if (hasPoint()) {
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+
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        java.nio.ByteBuffer data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        java.nio.ByteBuffer data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input, extensionRegistry);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
+    }
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input, extensionRegistry);
+    }
+
+    @java.lang.Override
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder() {
+      return DEFAULT_INSTANCE.toBuilder();
+    }
+    public static Builder newBuilder(ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 prototype) {
+      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+    }
+    @java.lang.Override
+    public Builder toBuilder() {
+      return this == DEFAULT_INSTANCE
+          ? new Builder() : new Builder().mergeFrom(this);
+    }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * <pre>
+     * IdentityEd25519 holds a Ed25519 public key (Point)
+     * </pre>
+     *
+     * Protobuf type {@code darc.IdentityEd25519}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+        // @@protoc_insertion_point(builder_implements:darc.IdentityEd25519)
+        ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519OrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_descriptor;
+      }
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.class, ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.Builder.class);
+      }
+
+      // Construct using ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessageV3
+                .alwaysUseFieldBuilders) {
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+      @java.lang.Override
+      public Builder clear() {
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+        point_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000001);
+        return this;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_descriptor;
+      }
+
+      @java.lang.Override
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 getDefaultInstanceForType() {
+        return ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.getDefaultInstance();
+      }
+
+      @java.lang.Override
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 build() {
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+        if (!result.isInitialized()) {
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+      }
+
+      @java.lang.Override
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 buildPartial() {
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+      @java.lang.Override
+      public Builder clone() {
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+      public Builder setField(
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+
+      public Builder mergeFrom(ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 other) {
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+
+      @java.lang.Override
+      public final boolean isInitialized() {
+        if (!hasPoint()) {
+          return false;
+        }
+        return true;
+      }
+
+      @java.lang.Override
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519) e.getUnfinishedMessage();
+          throw e.unwrapIOException();
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+      private int bitField0_;
+
+      private com.google.protobuf.ByteString point_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>required bytes point = 1;</code>
+       * @return Whether the point field is set.
+       */
+      @java.lang.Override
+      public boolean hasPoint() {
+        return ((bitField0_ & 0x00000001) != 0);
+      }
+      /**
+       * <code>required bytes point = 1;</code>
+       * @return The point.
+       */
+      @java.lang.Override
+      public com.google.protobuf.ByteString getPoint() {
+        return point_;
       }
       /**
-       * <pre>
-       * A claim signed by one of the keys in a DID Doc
-       * </pre>
-       *
-       * <code>optional .darc.IdentityDID did = 6;</code>
+       * <code>required bytes point = 1;</code>
+       * @param value The point to set.
+       * @return This builder for chaining.
        */
-      public ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder getDidOrBuilder() {
-        if (didBuilder_ != null) {
-          return didBuilder_.getMessageOrBuilder();
-        } else {
-          return did_ == null ?
-              ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.getDefaultInstance() : did_;
-        }
+      public Builder setPoint(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+        point_ = value;
+        onChanged();
+        return this;
       }
       /**
-       * <pre>
-       * A claim signed by one of the keys in a DID Doc
-       * </pre>
-       *
-       * <code>optional .darc.IdentityDID did = 6;</code>
+       * <code>required bytes point = 1;</code>
+       * @return This builder for chaining.
        */
-      private com.google.protobuf.SingleFieldBuilderV3<
-          ch.epfl.dedis.lib.proto.DarcProto.IdentityDID, ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder>
-          getDidFieldBuilder() {
-        if (didBuilder_ == null) {
-          didBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
-              ch.epfl.dedis.lib.proto.DarcProto.IdentityDID, ch.epfl.dedis.lib.proto.DarcProto.IdentityDID.Builder, ch.epfl.dedis.lib.proto.DarcProto.IdentityDIDOrBuilder>(
-                  getDid(),
-                  getParentForChildren(),
-                  isClean());
-          did_ = null;
-        }
-        return didBuilder_;
+      public Builder clearPoint() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        point_ = getDefaultInstance().getPoint();
+        onChanged();
+        return this;
       }
       @java.lang.Override
       public final Builder setUnknownFields(
@@ -4492,86 +5313,86 @@ public final Builder mergeUnknownFields(
       }
 
 
-      // @@protoc_insertion_point(builder_scope:darc.Identity)
+      // @@protoc_insertion_point(builder_scope:darc.IdentityEd25519)
     }
 
-    // @@protoc_insertion_point(class_scope:darc.Identity)
-    private static final ch.epfl.dedis.lib.proto.DarcProto.Identity DEFAULT_INSTANCE;
+    // @@protoc_insertion_point(class_scope:darc.IdentityEd25519)
+    private static final ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 DEFAULT_INSTANCE;
     static {
-      DEFAULT_INSTANCE = new ch.epfl.dedis.lib.proto.DarcProto.Identity();
+      DEFAULT_INSTANCE = new ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519();
     }
 
-    public static ch.epfl.dedis.lib.proto.DarcProto.Identity getDefaultInstance() {
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 getDefaultInstance() {
       return DEFAULT_INSTANCE;
     }
 
-    @java.lang.Deprecated public static final com.google.protobuf.Parser<Identity>
-        PARSER = new com.google.protobuf.AbstractParser<Identity>() {
+    @java.lang.Deprecated public static final com.google.protobuf.Parser<IdentityEd25519>
+        PARSER = new com.google.protobuf.AbstractParser<IdentityEd25519>() {
       @java.lang.Override
-      public Identity parsePartialFrom(
+      public IdentityEd25519 parsePartialFrom(
           com.google.protobuf.CodedInputStream input,
           com.google.protobuf.ExtensionRegistryLite extensionRegistry)
           throws com.google.protobuf.InvalidProtocolBufferException {
-        return new Identity(input, extensionRegistry);
+        return new IdentityEd25519(input, extensionRegistry);
       }
     };
 
-    public static com.google.protobuf.Parser<Identity> parser() {
+    public static com.google.protobuf.Parser<IdentityEd25519> parser() {
       return PARSER;
     }
 
     @java.lang.Override
-    public com.google.protobuf.Parser<Identity> getParserForType() {
+    public com.google.protobuf.Parser<IdentityEd25519> getParserForType() {
       return PARSER;
     }
 
     @java.lang.Override
-    public ch.epfl.dedis.lib.proto.DarcProto.Identity getDefaultInstanceForType() {
+    public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 getDefaultInstanceForType() {
       return DEFAULT_INSTANCE;
     }
 
   }
 
-  public interface IdentityEd25519OrBuilder extends
-      // @@protoc_insertion_point(interface_extends:darc.IdentityEd25519)
+  public interface IdentityTSMOrBuilder extends
+      // @@protoc_insertion_point(interface_extends:darc.IdentityTSM)
       com.google.protobuf.MessageOrBuilder {
 
     /**
-     * <code>required bytes point = 1;</code>
-     * @return Whether the point field is set.
+     * <code>required bytes publickey = 1;</code>
+     * @return Whether the publickey field is set.
      */
-    boolean hasPoint();
+    boolean hasPublickey();
     /**
-     * <code>required bytes point = 1;</code>
-     * @return The point.
+     * <code>required bytes publickey = 1;</code>
+     * @return The publickey.
      */
-    com.google.protobuf.ByteString getPoint();
+    com.google.protobuf.ByteString getPublickey();
   }
   /**
    * <pre>
-   * IdentityEd25519 holds a Ed25519 public key (Point)
+   * IdentityTSM holds a secp256k1 key (array of bytes)
    * </pre>
    *
-   * Protobuf type {@code darc.IdentityEd25519}
+   * Protobuf type {@code darc.IdentityTSM}
    */
-  public static final class IdentityEd25519 extends
+  public static final class IdentityTSM extends
       com.google.protobuf.GeneratedMessageV3 implements
-      // @@protoc_insertion_point(message_implements:darc.IdentityEd25519)
-      IdentityEd25519OrBuilder {
+      // @@protoc_insertion_point(message_implements:darc.IdentityTSM)
+      IdentityTSMOrBuilder {
   private static final long serialVersionUID = 0L;
-    // Use IdentityEd25519.newBuilder() to construct.
-    private IdentityEd25519(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+    // Use IdentityTSM.newBuilder() to construct.
+    private IdentityTSM(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
       super(builder);
     }
-    private IdentityEd25519() {
-      point_ = com.google.protobuf.ByteString.EMPTY;
+    private IdentityTSM() {
+      publickey_ = com.google.protobuf.ByteString.EMPTY;
     }
 
     @java.lang.Override
     @SuppressWarnings({"unused"})
     protected java.lang.Object newInstance(
         UnusedPrivateParameter unused) {
-      return new IdentityEd25519();
+      return new IdentityTSM();
     }
 
     @java.lang.Override
@@ -4579,7 +5400,7 @@ protected java.lang.Object newInstance(
     getUnknownFields() {
       return this.unknownFields;
     }
-    private IdentityEd25519(
+    private IdentityTSM(
         com.google.protobuf.CodedInputStream input,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws com.google.protobuf.InvalidProtocolBufferException {
@@ -4600,7 +5421,7 @@ private IdentityEd25519(
               break;
             case 10: {
               bitField0_ |= 0x00000001;
-              point_ = input.readBytes();
+              publickey_ = input.readBytes();
               break;
             }
             default: {
@@ -4624,35 +5445,35 @@ private IdentityEd25519(
     }
     public static final com.google.protobuf.Descriptors.Descriptor
         getDescriptor() {
-      return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_descriptor;
+      return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityTSM_descriptor;
     }
 
     @java.lang.Override
     protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
         internalGetFieldAccessorTable() {
-      return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_fieldAccessorTable
+      return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityTSM_fieldAccessorTable
           .ensureFieldAccessorsInitialized(
-              ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.class, ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.Builder.class);
+              ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.class, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder.class);
     }
 
     private int bitField0_;
-    public static final int POINT_FIELD_NUMBER = 1;
-    private com.google.protobuf.ByteString point_;
+    public static final int PUBLICKEY_FIELD_NUMBER = 1;
+    private com.google.protobuf.ByteString publickey_;
     /**
-     * <code>required bytes point = 1;</code>
-     * @return Whether the point field is set.
+     * <code>required bytes publickey = 1;</code>
+     * @return Whether the publickey field is set.
      */
     @java.lang.Override
-    public boolean hasPoint() {
+    public boolean hasPublickey() {
       return ((bitField0_ & 0x00000001) != 0);
     }
     /**
-     * <code>required bytes point = 1;</code>
-     * @return The point.
+     * <code>required bytes publickey = 1;</code>
+     * @return The publickey.
      */
     @java.lang.Override
-    public com.google.protobuf.ByteString getPoint() {
-      return point_;
+    public com.google.protobuf.ByteString getPublickey() {
+      return publickey_;
     }
 
     private byte memoizedIsInitialized = -1;
@@ -4662,7 +5483,7 @@ public final boolean isInitialized() {
       if (isInitialized == 1) return true;
       if (isInitialized == 0) return false;
 
-      if (!hasPoint()) {
+      if (!hasPublickey()) {
         memoizedIsInitialized = 0;
         return false;
       }
@@ -4674,7 +5495,7 @@ public final boolean isInitialized() {
     public void writeTo(com.google.protobuf.CodedOutputStream output)
                         throws java.io.IOException {
       if (((bitField0_ & 0x00000001) != 0)) {
-        output.writeBytes(1, point_);
+        output.writeBytes(1, publickey_);
       }
       unknownFields.writeTo(output);
     }
@@ -4687,7 +5508,7 @@ public int getSerializedSize() {
       size = 0;
       if (((bitField0_ & 0x00000001) != 0)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeBytesSize(1, point_);
+          .computeBytesSize(1, publickey_);
       }
       size += unknownFields.getSerializedSize();
       memoizedSize = size;
@@ -4699,15 +5520,15 @@ public boolean equals(final java.lang.Object obj) {
       if (obj == this) {
        return true;
       }
-      if (!(obj instanceof ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519)) {
+      if (!(obj instanceof ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM)) {
         return super.equals(obj);
       }
-      ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 other = (ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519) obj;
+      ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM other = (ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM) obj;
 
-      if (hasPoint() != other.hasPoint()) return false;
-      if (hasPoint()) {
-        if (!getPoint()
-            .equals(other.getPoint())) return false;
+      if (hasPublickey() != other.hasPublickey()) return false;
+      if (hasPublickey()) {
+        if (!getPublickey()
+            .equals(other.getPublickey())) return false;
       }
       if (!unknownFields.equals(other.unknownFields)) return false;
       return true;
@@ -4720,78 +5541,78 @@ public int hashCode() {
       }
       int hash = 41;
       hash = (19 * hash) + getDescriptor().hashCode();
-      if (hasPoint()) {
-        hash = (37 * hash) + POINT_FIELD_NUMBER;
-        hash = (53 * hash) + getPoint().hashCode();
+      if (hasPublickey()) {
+        hash = (37 * hash) + PUBLICKEY_FIELD_NUMBER;
+        hash = (53 * hash) + getPublickey().hashCode();
       }
       hash = (29 * hash) + unknownFields.hashCode();
       memoizedHashCode = hash;
       return hash;
     }
 
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         java.nio.ByteBuffer data)
         throws com.google.protobuf.InvalidProtocolBufferException {
       return PARSER.parseFrom(data);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         java.nio.ByteBuffer data,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws com.google.protobuf.InvalidProtocolBufferException {
       return PARSER.parseFrom(data, extensionRegistry);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         com.google.protobuf.ByteString data)
         throws com.google.protobuf.InvalidProtocolBufferException {
       return PARSER.parseFrom(data);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         com.google.protobuf.ByteString data,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws com.google.protobuf.InvalidProtocolBufferException {
       return PARSER.parseFrom(data, extensionRegistry);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(byte[] data)
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(byte[] data)
         throws com.google.protobuf.InvalidProtocolBufferException {
       return PARSER.parseFrom(data);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         byte[] data,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws com.google.protobuf.InvalidProtocolBufferException {
       return PARSER.parseFrom(data, extensionRegistry);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(java.io.InputStream input)
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(java.io.InputStream input)
         throws java.io.IOException {
       return com.google.protobuf.GeneratedMessageV3
           .parseWithIOException(PARSER, input);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         java.io.InputStream input,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws java.io.IOException {
       return com.google.protobuf.GeneratedMessageV3
           .parseWithIOException(PARSER, input, extensionRegistry);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseDelimitedFrom(java.io.InputStream input)
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseDelimitedFrom(java.io.InputStream input)
         throws java.io.IOException {
       return com.google.protobuf.GeneratedMessageV3
           .parseDelimitedWithIOException(PARSER, input);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseDelimitedFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseDelimitedFrom(
         java.io.InputStream input,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws java.io.IOException {
       return com.google.protobuf.GeneratedMessageV3
           .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         com.google.protobuf.CodedInputStream input)
         throws java.io.IOException {
       return com.google.protobuf.GeneratedMessageV3
           .parseWithIOException(PARSER, input);
     }
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parseFrom(
         com.google.protobuf.CodedInputStream input,
         com.google.protobuf.ExtensionRegistryLite extensionRegistry)
         throws java.io.IOException {
@@ -4804,7 +5625,7 @@ public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parseFrom(
     public static Builder newBuilder() {
       return DEFAULT_INSTANCE.toBuilder();
     }
-    public static Builder newBuilder(ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 prototype) {
+    public static Builder newBuilder(ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM prototype) {
       return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
     }
     @java.lang.Override
@@ -4821,29 +5642,29 @@ protected Builder newBuilderForType(
     }
     /**
      * <pre>
-     * IdentityEd25519 holds a Ed25519 public key (Point)
+     * IdentityTSM holds a secp256k1 key (array of bytes)
      * </pre>
      *
-     * Protobuf type {@code darc.IdentityEd25519}
+     * Protobuf type {@code darc.IdentityTSM}
      */
     public static final class Builder extends
         com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
-        // @@protoc_insertion_point(builder_implements:darc.IdentityEd25519)
-        ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519OrBuilder {
+        // @@protoc_insertion_point(builder_implements:darc.IdentityTSM)
+        ch.epfl.dedis.lib.proto.DarcProto.IdentityTSMOrBuilder {
       public static final com.google.protobuf.Descriptors.Descriptor
           getDescriptor() {
-        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_descriptor;
+        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityTSM_descriptor;
       }
 
       @java.lang.Override
       protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
           internalGetFieldAccessorTable() {
-        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_fieldAccessorTable
+        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityTSM_fieldAccessorTable
             .ensureFieldAccessorsInitialized(
-                ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.class, ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.Builder.class);
+                ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.class, ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.Builder.class);
       }
 
-      // Construct using ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.newBuilder()
+      // Construct using ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.newBuilder()
       private Builder() {
         maybeForceBuilderInitialization();
       }
@@ -4861,7 +5682,7 @@ private void maybeForceBuilderInitialization() {
       @java.lang.Override
       public Builder clear() {
         super.clear();
-        point_ = com.google.protobuf.ByteString.EMPTY;
+        publickey_ = com.google.protobuf.ByteString.EMPTY;
         bitField0_ = (bitField0_ & ~0x00000001);
         return this;
       }
@@ -4869,17 +5690,17 @@ public Builder clear() {
       @java.lang.Override
       public com.google.protobuf.Descriptors.Descriptor
           getDescriptorForType() {
-        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityEd25519_descriptor;
+        return ch.epfl.dedis.lib.proto.DarcProto.internal_static_darc_IdentityTSM_descriptor;
       }
 
       @java.lang.Override
-      public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 getDefaultInstanceForType() {
-        return ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.getDefaultInstance();
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM getDefaultInstanceForType() {
+        return ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance();
       }
 
       @java.lang.Override
-      public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 build() {
-        ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 result = buildPartial();
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM build() {
+        ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM result = buildPartial();
         if (!result.isInitialized()) {
           throw newUninitializedMessageException(result);
         }
@@ -4887,14 +5708,14 @@ public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 build() {
       }
 
       @java.lang.Override
-      public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 buildPartial() {
-        ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 result = new ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519(this);
+      public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM buildPartial() {
+        ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM result = new ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM(this);
         int from_bitField0_ = bitField0_;
         int to_bitField0_ = 0;
         if (((from_bitField0_ & 0x00000001) != 0)) {
           to_bitField0_ |= 0x00000001;
         }
-        result.point_ = point_;
+        result.publickey_ = publickey_;
         result.bitField0_ = to_bitField0_;
         onBuilt();
         return result;
@@ -4934,18 +5755,18 @@ public Builder addRepeatedField(
       }
       @java.lang.Override
       public Builder mergeFrom(com.google.protobuf.Message other) {
-        if (other instanceof ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519) {
-          return mergeFrom((ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519)other);
+        if (other instanceof ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM) {
+          return mergeFrom((ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM)other);
         } else {
           super.mergeFrom(other);
           return this;
         }
       }
 
-      public Builder mergeFrom(ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 other) {
-        if (other == ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519.getDefaultInstance()) return this;
-        if (other.hasPoint()) {
-          setPoint(other.getPoint());
+      public Builder mergeFrom(ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM other) {
+        if (other == ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM.getDefaultInstance()) return this;
+        if (other.hasPublickey()) {
+          setPublickey(other.getPublickey());
         }
         this.mergeUnknownFields(other.unknownFields);
         onChanged();
@@ -4954,7 +5775,7 @@ public Builder mergeFrom(ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 other
 
       @java.lang.Override
       public final boolean isInitialized() {
-        if (!hasPoint()) {
+        if (!hasPublickey()) {
           return false;
         }
         return true;
@@ -4965,11 +5786,11 @@ public Builder mergeFrom(
           com.google.protobuf.CodedInputStream input,
           com.google.protobuf.ExtensionRegistryLite extensionRegistry)
           throws java.io.IOException {
-        ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 parsedMessage = null;
+        ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM parsedMessage = null;
         try {
           parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
         } catch (com.google.protobuf.InvalidProtocolBufferException e) {
-          parsedMessage = (ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519) e.getUnfinishedMessage();
+          parsedMessage = (ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM) e.getUnfinishedMessage();
           throw e.unwrapIOException();
         } finally {
           if (parsedMessage != null) {
@@ -4980,44 +5801,44 @@ public Builder mergeFrom(
       }
       private int bitField0_;
 
-      private com.google.protobuf.ByteString point_ = com.google.protobuf.ByteString.EMPTY;
+      private com.google.protobuf.ByteString publickey_ = com.google.protobuf.ByteString.EMPTY;
       /**
-       * <code>required bytes point = 1;</code>
-       * @return Whether the point field is set.
+       * <code>required bytes publickey = 1;</code>
+       * @return Whether the publickey field is set.
        */
       @java.lang.Override
-      public boolean hasPoint() {
+      public boolean hasPublickey() {
         return ((bitField0_ & 0x00000001) != 0);
       }
       /**
-       * <code>required bytes point = 1;</code>
-       * @return The point.
+       * <code>required bytes publickey = 1;</code>
+       * @return The publickey.
        */
       @java.lang.Override
-      public com.google.protobuf.ByteString getPoint() {
-        return point_;
+      public com.google.protobuf.ByteString getPublickey() {
+        return publickey_;
       }
       /**
-       * <code>required bytes point = 1;</code>
-       * @param value The point to set.
+       * <code>required bytes publickey = 1;</code>
+       * @param value The publickey to set.
        * @return This builder for chaining.
        */
-      public Builder setPoint(com.google.protobuf.ByteString value) {
+      public Builder setPublickey(com.google.protobuf.ByteString value) {
         if (value == null) {
     throw new NullPointerException();
   }
   bitField0_ |= 0x00000001;
-        point_ = value;
+        publickey_ = value;
         onChanged();
         return this;
       }
       /**
-       * <code>required bytes point = 1;</code>
+       * <code>required bytes publickey = 1;</code>
        * @return This builder for chaining.
        */
-      public Builder clearPoint() {
+      public Builder clearPublickey() {
         bitField0_ = (bitField0_ & ~0x00000001);
-        point_ = getDefaultInstance().getPoint();
+        publickey_ = getDefaultInstance().getPublickey();
         onChanged();
         return this;
       }
@@ -5034,41 +5855,41 @@ public final Builder mergeUnknownFields(
       }
 
 
-      // @@protoc_insertion_point(builder_scope:darc.IdentityEd25519)
+      // @@protoc_insertion_point(builder_scope:darc.IdentityTSM)
     }
 
-    // @@protoc_insertion_point(class_scope:darc.IdentityEd25519)
-    private static final ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 DEFAULT_INSTANCE;
+    // @@protoc_insertion_point(class_scope:darc.IdentityTSM)
+    private static final ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM DEFAULT_INSTANCE;
     static {
-      DEFAULT_INSTANCE = new ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519();
+      DEFAULT_INSTANCE = new ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM();
     }
 
-    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 getDefaultInstance() {
+    public static ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM getDefaultInstance() {
       return DEFAULT_INSTANCE;
     }
 
-    @java.lang.Deprecated public static final com.google.protobuf.Parser<IdentityEd25519>
-        PARSER = new com.google.protobuf.AbstractParser<IdentityEd25519>() {
+    @java.lang.Deprecated public static final com.google.protobuf.Parser<IdentityTSM>
+        PARSER = new com.google.protobuf.AbstractParser<IdentityTSM>() {
       @java.lang.Override
-      public IdentityEd25519 parsePartialFrom(
+      public IdentityTSM parsePartialFrom(
           com.google.protobuf.CodedInputStream input,
           com.google.protobuf.ExtensionRegistryLite extensionRegistry)
           throws com.google.protobuf.InvalidProtocolBufferException {
-        return new IdentityEd25519(input, extensionRegistry);
+        return new IdentityTSM(input, extensionRegistry);
       }
     };
 
-    public static com.google.protobuf.Parser<IdentityEd25519> parser() {
+    public static com.google.protobuf.Parser<IdentityTSM> parser() {
       return PARSER;
     }
 
     @java.lang.Override
-    public com.google.protobuf.Parser<IdentityEd25519> getParserForType() {
+    public com.google.protobuf.Parser<IdentityTSM> getParserForType() {
       return PARSER;
     }
 
     @java.lang.Override
-    public ch.epfl.dedis.lib.proto.DarcProto.IdentityEd25519 getDefaultInstanceForType() {
+    public ch.epfl.dedis.lib.proto.DarcProto.IdentityTSM getDefaultInstanceForType() {
       return DEFAULT_INSTANCE;
     }
 
@@ -22505,6 +23326,11 @@ public ch.epfl.dedis.lib.proto.DarcProto.Rule getDefaultInstanceForType() {
   private static final
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_darc_IdentityEd25519_fieldAccessorTable;
+  private static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_darc_IdentityTSM_descriptor;
+  private static final
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_darc_IdentityTSM_fieldAccessorTable;
   private static final com.google.protobuf.Descriptors.Descriptor
     internal_static_darc_IdentityX509EC_descriptor;
   private static final
@@ -22614,47 +23440,49 @@ public ch.epfl.dedis.lib.proto.DarcProto.Rule getDefaultInstanceForType() {
       "\014\022\016\n\006previd\030\004 \002(\014\022\032\n\005rules\030\005 \002(\0132\013.darc." +
       "Rules\022#\n\nsignatures\030\006 \003(\0132\017.darc.Signatu" +
       "re\022%\n\021verificationdarcs\030\007 \003(\0132\n.darc.Dar" +
-      "c\"\356\001\n\010Identity\022 \n\004darc\030\001 \001(\0132\022.darc.Iden" +
+      "c\"\216\002\n\010Identity\022 \n\004darc\030\001 \001(\0132\022.darc.Iden" +
       "tityDarc\022&\n\007ed25519\030\002 \001(\0132\025.darc.Identit" +
       "yEd25519\022$\n\006x509ec\030\003 \001(\0132\024.darc.Identity" +
       "X509EC\022\"\n\005proxy\030\004 \001(\0132\023.darc.IdentityPro" +
       "xy\022.\n\013evmcontract\030\005 \001(\0132\031.darc.IdentityE" +
       "vmContract\022\036\n\003did\030\006 \001(\0132\021.darc.IdentityD" +
-      "ID\" \n\017IdentityEd25519\022\r\n\005point\030\001 \002(\014\" \n\016" +
-      "IdentityX509EC\022\016\n\006public\030\001 \002(\014\"-\n\rIdenti" +
-      "tyProxy\022\014\n\004data\030\001 \002(\t\022\016\n\006public\030\002 \002(\014\"\032\n" +
-      "\014IdentityDarc\022\n\n\002id\030\001 \002(\014\"&\n\023IdentityEvm" +
-      "Contract\022\017\n\007address\030\001 \002(\014\"H\n\013IdentityDID" +
-      "\022\013\n\003did\030\001 \002(\t\022\034\n\006diddoc\030\002 \001(\0132\014.darc.DID" +
-      "Doc\022\016\n\006method\030\003 \002(\t\"\236\001\n\006DIDDoc\022\017\n\007contex" +
-      "t\030\001 \003(\t\022\n\n\002id\030\002 \002(\t\022\"\n\tpublickey\030\003 \003(\0132\017" +
-      ".darc.PublicKey\022!\n\007service\030\004 \003(\0132\020.darc." +
-      "DIDService\0220\n\016authentication\030\005 \003(\0132\030.dar" +
-      "c.VerificationMethod\"H\n\tPublicKey\022\n\n\002id\030" +
-      "\001 \002(\t\022\014\n\004type\030\002 \002(\t\022\022\n\ncontroller\030\003 \002(\t\022" +
-      "\r\n\005value\030\004 \002(\014\"}\n\nDIDService\022\n\n\002id\030\001 \002(\t" +
-      "\022\014\n\004type\030\002 \002(\t\022\020\n\010priority\030\003 \002(\021\022\025\n\rreci" +
-      "pientkeys\030\004 \003(\t\022\023\n\013routingkeys\030\005 \003(\t\022\027\n\017" +
-      "serviceendpoint\030\006 \002(\t\"8\n\022VerificationMet" +
-      "hod\022\"\n\tpublickey\030\001 \002(\0132\017.darc.PublicKey\"" +
-      ">\n\tSignature\022\021\n\tsignature\030\001 \002(\014\022\036\n\006signe" +
-      "r\030\002 \002(\0132\016.darc.Identity\"\300\001\n\006Signer\022$\n\007ed" +
-      "25519\030\001 \001(\0132\023.darc.SignerEd25519\022\"\n\006x509" +
-      "ec\030\002 \001(\0132\022.darc.SignerX509EC\022 \n\005proxy\030\003 " +
-      "\001(\0132\021.darc.SignerProxy\022,\n\013evmcontract\030\004 " +
-      "\001(\0132\027.darc.SignerEvmContract\022\034\n\003did\030\005 \001(" +
-      "\0132\017.darc.SignerDID\".\n\rSignerEd25519\022\r\n\005p" +
-      "oint\030\001 \002(\014\022\016\n\006secret\030\002 \002(\014\"\035\n\014SignerX509" +
-      "EC\022\r\n\005point\030\001 \002(\014\"+\n\013SignerProxy\022\014\n\004data" +
-      "\030\001 \002(\t\022\016\n\006public\030\002 \002(\014\"$\n\021SignerEvmContr" +
-      "act\022\017\n\007address\030\001 \002(\014\"8\n\tSignerDID\022\016\n\006pub" +
-      "lic\030\001 \002(\014\022\016\n\006secret\030\002 \002(\014\022\013\n\003did\030\003 \002(\t\"n" +
-      "\n\007Request\022\016\n\006baseid\030\001 \002(\014\022\016\n\006action\030\002 \002(" +
-      "\t\022\013\n\003msg\030\003 \002(\014\022\"\n\nidentities\030\004 \003(\0132\016.dar" +
-      "c.Identity\022\022\n\nsignatures\030\005 \003(\014\"!\n\005Rules\022" +
-      "\030\n\004list\030\001 \003(\0132\n.darc.Rule\"$\n\004Rule\022\016\n\006act" +
-      "ion\030\001 \002(\t\022\014\n\004expr\030\002 \002(\014B$\n\027ch.epfl.dedis" +
-      ".lib.protoB\tDarcProto"
+      "ID\022\036\n\003tsm\030\007 \001(\0132\021.darc.IdentityTSM\" \n\017Id" +
+      "entityEd25519\022\r\n\005point\030\001 \002(\014\" \n\013Identity" +
+      "TSM\022\021\n\tpublickey\030\001 \002(\014\" \n\016IdentityX509EC" +
+      "\022\016\n\006public\030\001 \002(\014\"-\n\rIdentityProxy\022\014\n\004dat" +
+      "a\030\001 \002(\t\022\016\n\006public\030\002 \002(\014\"\032\n\014IdentityDarc\022" +
+      "\n\n\002id\030\001 \002(\014\"&\n\023IdentityEvmContract\022\017\n\007ad" +
+      "dress\030\001 \002(\014\"H\n\013IdentityDID\022\013\n\003did\030\001 \002(\t\022" +
+      "\034\n\006diddoc\030\002 \001(\0132\014.darc.DIDDoc\022\016\n\006method\030" +
+      "\003 \002(\t\"\236\001\n\006DIDDoc\022\017\n\007context\030\001 \003(\t\022\n\n\002id\030" +
+      "\002 \002(\t\022\"\n\tpublickey\030\003 \003(\0132\017.darc.PublicKe" +
+      "y\022!\n\007service\030\004 \003(\0132\020.darc.DIDService\0220\n\016" +
+      "authentication\030\005 \003(\0132\030.darc.Verification" +
+      "Method\"H\n\tPublicKey\022\n\n\002id\030\001 \002(\t\022\014\n\004type\030" +
+      "\002 \002(\t\022\022\n\ncontroller\030\003 \002(\t\022\r\n\005value\030\004 \002(\014" +
+      "\"}\n\nDIDService\022\n\n\002id\030\001 \002(\t\022\014\n\004type\030\002 \002(\t" +
+      "\022\020\n\010priority\030\003 \002(\021\022\025\n\rrecipientkeys\030\004 \003(" +
+      "\t\022\023\n\013routingkeys\030\005 \003(\t\022\027\n\017serviceendpoin" +
+      "t\030\006 \002(\t\"8\n\022VerificationMethod\022\"\n\tpublick" +
+      "ey\030\001 \002(\0132\017.darc.PublicKey\">\n\tSignature\022\021" +
+      "\n\tsignature\030\001 \002(\014\022\036\n\006signer\030\002 \002(\0132\016.darc" +
+      ".Identity\"\300\001\n\006Signer\022$\n\007ed25519\030\001 \001(\0132\023." +
+      "darc.SignerEd25519\022\"\n\006x509ec\030\002 \001(\0132\022.dar" +
+      "c.SignerX509EC\022 \n\005proxy\030\003 \001(\0132\021.darc.Sig" +
+      "nerProxy\022,\n\013evmcontract\030\004 \001(\0132\027.darc.Sig" +
+      "nerEvmContract\022\034\n\003did\030\005 \001(\0132\017.darc.Signe" +
+      "rDID\".\n\rSignerEd25519\022\r\n\005point\030\001 \002(\014\022\016\n\006" +
+      "secret\030\002 \002(\014\"\035\n\014SignerX509EC\022\r\n\005point\030\001 " +
+      "\002(\014\"+\n\013SignerProxy\022\014\n\004data\030\001 \002(\t\022\016\n\006publ" +
+      "ic\030\002 \002(\014\"$\n\021SignerEvmContract\022\017\n\007address" +
+      "\030\001 \002(\014\"8\n\tSignerDID\022\016\n\006public\030\001 \002(\014\022\016\n\006s" +
+      "ecret\030\002 \002(\014\022\013\n\003did\030\003 \002(\t\"n\n\007Request\022\016\n\006b" +
+      "aseid\030\001 \002(\014\022\016\n\006action\030\002 \002(\t\022\013\n\003msg\030\003 \002(\014" +
+      "\022\"\n\nidentities\030\004 \003(\0132\016.darc.Identity\022\022\n\n" +
+      "signatures\030\005 \003(\014\"!\n\005Rules\022\030\n\004list\030\001 \003(\0132" +
+      "\n.darc.Rule\"$\n\004Rule\022\016\n\006action\030\001 \002(\t\022\014\n\004e" +
+      "xpr\030\002 \002(\014B$\n\027ch.epfl.dedis.lib.protoB\tDa" +
+      "rcProto"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -22671,123 +23499,129 @@ public ch.epfl.dedis.lib.proto.DarcProto.Rule getDefaultInstanceForType() {
     internal_static_darc_Identity_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_Identity_descriptor,
-        new java.lang.String[] { "Darc", "Ed25519", "X509Ec", "Proxy", "Evmcontract", "Did", });
+        new java.lang.String[] { "Darc", "Ed25519", "X509Ec", "Proxy", "Evmcontract", "Did", "Tsm", });
     internal_static_darc_IdentityEd25519_descriptor =
       getDescriptor().getMessageTypes().get(2);
     internal_static_darc_IdentityEd25519_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_IdentityEd25519_descriptor,
         new java.lang.String[] { "Point", });
-    internal_static_darc_IdentityX509EC_descriptor =
+    internal_static_darc_IdentityTSM_descriptor =
       getDescriptor().getMessageTypes().get(3);
+    internal_static_darc_IdentityTSM_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_darc_IdentityTSM_descriptor,
+        new java.lang.String[] { "Publickey", });
+    internal_static_darc_IdentityX509EC_descriptor =
+      getDescriptor().getMessageTypes().get(4);
     internal_static_darc_IdentityX509EC_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_IdentityX509EC_descriptor,
         new java.lang.String[] { "Public", });
     internal_static_darc_IdentityProxy_descriptor =
-      getDescriptor().getMessageTypes().get(4);
+      getDescriptor().getMessageTypes().get(5);
     internal_static_darc_IdentityProxy_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_IdentityProxy_descriptor,
         new java.lang.String[] { "Data", "Public", });
     internal_static_darc_IdentityDarc_descriptor =
-      getDescriptor().getMessageTypes().get(5);
+      getDescriptor().getMessageTypes().get(6);
     internal_static_darc_IdentityDarc_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_IdentityDarc_descriptor,
         new java.lang.String[] { "Id", });
     internal_static_darc_IdentityEvmContract_descriptor =
-      getDescriptor().getMessageTypes().get(6);
+      getDescriptor().getMessageTypes().get(7);
     internal_static_darc_IdentityEvmContract_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_IdentityEvmContract_descriptor,
         new java.lang.String[] { "Address", });
     internal_static_darc_IdentityDID_descriptor =
-      getDescriptor().getMessageTypes().get(7);
+      getDescriptor().getMessageTypes().get(8);
     internal_static_darc_IdentityDID_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_IdentityDID_descriptor,
         new java.lang.String[] { "Did", "Diddoc", "Method", });
     internal_static_darc_DIDDoc_descriptor =
-      getDescriptor().getMessageTypes().get(8);
+      getDescriptor().getMessageTypes().get(9);
     internal_static_darc_DIDDoc_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_DIDDoc_descriptor,
         new java.lang.String[] { "Context", "Id", "Publickey", "Service", "Authentication", });
     internal_static_darc_PublicKey_descriptor =
-      getDescriptor().getMessageTypes().get(9);
+      getDescriptor().getMessageTypes().get(10);
     internal_static_darc_PublicKey_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_PublicKey_descriptor,
         new java.lang.String[] { "Id", "Type", "Controller", "Value", });
     internal_static_darc_DIDService_descriptor =
-      getDescriptor().getMessageTypes().get(10);
+      getDescriptor().getMessageTypes().get(11);
     internal_static_darc_DIDService_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_DIDService_descriptor,
         new java.lang.String[] { "Id", "Type", "Priority", "Recipientkeys", "Routingkeys", "Serviceendpoint", });
     internal_static_darc_VerificationMethod_descriptor =
-      getDescriptor().getMessageTypes().get(11);
+      getDescriptor().getMessageTypes().get(12);
     internal_static_darc_VerificationMethod_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_VerificationMethod_descriptor,
         new java.lang.String[] { "Publickey", });
     internal_static_darc_Signature_descriptor =
-      getDescriptor().getMessageTypes().get(12);
+      getDescriptor().getMessageTypes().get(13);
     internal_static_darc_Signature_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_Signature_descriptor,
         new java.lang.String[] { "Signature", "Signer", });
     internal_static_darc_Signer_descriptor =
-      getDescriptor().getMessageTypes().get(13);
+      getDescriptor().getMessageTypes().get(14);
     internal_static_darc_Signer_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_Signer_descriptor,
         new java.lang.String[] { "Ed25519", "X509Ec", "Proxy", "Evmcontract", "Did", });
     internal_static_darc_SignerEd25519_descriptor =
-      getDescriptor().getMessageTypes().get(14);
+      getDescriptor().getMessageTypes().get(15);
     internal_static_darc_SignerEd25519_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_SignerEd25519_descriptor,
         new java.lang.String[] { "Point", "Secret", });
     internal_static_darc_SignerX509EC_descriptor =
-      getDescriptor().getMessageTypes().get(15);
+      getDescriptor().getMessageTypes().get(16);
     internal_static_darc_SignerX509EC_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_SignerX509EC_descriptor,
         new java.lang.String[] { "Point", });
     internal_static_darc_SignerProxy_descriptor =
-      getDescriptor().getMessageTypes().get(16);
+      getDescriptor().getMessageTypes().get(17);
     internal_static_darc_SignerProxy_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_SignerProxy_descriptor,
         new java.lang.String[] { "Data", "Public", });
     internal_static_darc_SignerEvmContract_descriptor =
-      getDescriptor().getMessageTypes().get(17);
+      getDescriptor().getMessageTypes().get(18);
     internal_static_darc_SignerEvmContract_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_SignerEvmContract_descriptor,
         new java.lang.String[] { "Address", });
     internal_static_darc_SignerDID_descriptor =
-      getDescriptor().getMessageTypes().get(18);
+      getDescriptor().getMessageTypes().get(19);
     internal_static_darc_SignerDID_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_SignerDID_descriptor,
         new java.lang.String[] { "Public", "Secret", "Did", });
     internal_static_darc_Request_descriptor =
-      getDescriptor().getMessageTypes().get(19);
+      getDescriptor().getMessageTypes().get(20);
     internal_static_darc_Request_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_Request_descriptor,
         new java.lang.String[] { "Baseid", "Action", "Msg", "Identities", "Signatures", });
     internal_static_darc_Rules_descriptor =
-      getDescriptor().getMessageTypes().get(20);
+      getDescriptor().getMessageTypes().get(21);
     internal_static_darc_Rules_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_Rules_descriptor,
         new java.lang.String[] { "List", });
     internal_static_darc_Rule_descriptor =
-      getDescriptor().getMessageTypes().get(21);
+      getDescriptor().getMessageTypes().get(22);
     internal_static_darc_Rule_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_darc_Rule_descriptor,
diff --git a/external/js/cothority/src/protobuf/models.json b/external/js/cothority/src/protobuf/models.json
index 8048d0f5d1..8ded5cc2f2 100644
--- a/external/js/cothority/src/protobuf/models.json
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diff --git a/external/proto/darc.proto b/external/proto/darc.proto
index b07c98801d..149fd2b093 100644
--- a/external/proto/darc.proto
+++ b/external/proto/darc.proto
@@ -50,6 +50,8 @@ message Identity {
   optional IdentityEvmContract evmcontract = 5;
   // A claim signed by one of the keys in a DID Doc
   optional IdentityDID did = 6;
+  // Public-key identity from an ECDSA key
+  optional IdentityTSM tsm = 7;
 }
 
 // IdentityEd25519 holds a Ed25519 public key (Point)
@@ -57,6 +59,11 @@ message IdentityEd25519 {
   required bytes point = 1;
 }
 
+// IdentityTSM holds a secp256k1 key (array of bytes)
+message IdentityTSM {
+  required bytes publickey = 1;
+}
+
 // IdentityX509EC holds a public key from a X509EC
 message IdentityX509EC {
   required bytes public = 1;

From b5e6d1b5c39a3fa65206bcf18e1764f5d8aed2e6 Mon Sep 17 00:00:00 2001
From: Linus Gasser <linus.gasser@epfl.ch>
Date: Fri, 11 Feb 2022 14:47:01 +0100
Subject: [PATCH 2/3] Updating go-version to use in tests and deploy

---
 .github/workflows/full_test.yaml       | 2 +-
 .github/workflows/lint_build_test.yaml | 4 ++--
 .github/workflows/release.yaml         | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/full_test.yaml b/.github/workflows/full_test.yaml
index 2f1780dc99..7d3dc07ad8 100644
--- a/.github/workflows/full_test.yaml
+++ b/.github/workflows/full_test.yaml
@@ -5,7 +5,7 @@ on:
     - cron: "12 6 * * 1-5"
 
 env:
-  GO_VERSION: 1.15
+  GO_VERSION: 1.17
 
 jobs:
   go:
diff --git a/.github/workflows/lint_build_test.yaml b/.github/workflows/lint_build_test.yaml
index 36320cf5c9..601f2f1b85 100644
--- a/.github/workflows/lint_build_test.yaml
+++ b/.github/workflows/lint_build_test.yaml
@@ -5,7 +5,7 @@ on:
 
 env:
   NODE_VERSION: 10
-  GO_VERSION: 1.15
+  GO_VERSION: 1.16
   JAVA_VERSION: 9
 
 jobs:
@@ -39,7 +39,7 @@ jobs:
 
     strategy:
       matrix:
-        golang-version: [1.14, 1.15] # Cannot use env. here :(
+        golang-version: [1.16, 1.17] # Cannot use env. here :(
 
     steps:
       - uses: actions/checkout@main
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 50e64448e8..890dbd0775 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -6,7 +6,7 @@ on:
       - 'v*'
 
 env:
-  GO_VERSION: 1.15
+  GO_VERSION: 1.17
 
 jobs:
   go:

From 581c742b28d74682a0278723f442288102cc95e5 Mon Sep 17 00:00:00 2001
From: Linus Gasser <linus.gasser@epfl.ch>
Date: Sun, 13 Feb 2022 16:35:17 +0100
Subject: [PATCH 3/3] @tharvik's comments

---
 darc/darc.go | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/darc/darc.go b/darc/darc.go
index 30c6814157..2b53038b34 100644
--- a/darc/darc.go
+++ b/darc/darc.go
@@ -929,10 +929,7 @@ func (id Identity) String() string {
 	case 5:
 		return fmt.Sprintf("%s:%s", id.TypeString(), id.DID.DID)
 	case 6:
-		buf, err := id.TSM.MarshalBinary()
-		if err != nil {
-			panic("couldn't marshal TSM key: " + err.Error())
-		}
+		buf, _ := id.TSM.MarshalBinary()
 		return fmt.Sprintf("%s:%x", id.TypeString(), buf)
 	default:
 		return "No identity"
@@ -983,8 +980,7 @@ func (id Identity) GetPublicBytes() []byte {
 	case 4:
 		return id.EvmContract.Address[:]
 	case 6:
-		buf := id.TSM.PublicKey
-		return buf
+		return id.TSM.PublicKey
 	default:
 		return nil
 	}