diff --git a/draft-bradleylundberg-cfrg-arkg.md b/draft-bradleylundberg-cfrg-arkg.md
index 81520e7..e77511e 100644
--- a/draft-bradleylundberg-cfrg-arkg.md
+++ b/draft-bradleylundberg-cfrg-arkg.md
@@ -939,7 +939,8 @@ An ARKG public seed is represented as a COSE_Key structure [RFC9052]
 with `kty` value TBD (placeholder value -65537).
 This key type defines key type parameters -1 and -2 for the `BL` and `KEM` public key, respectively.
 
-The `alg` parameter defines the `alg` parameter of ARKG derived public keys derived from this ARKG public seed.
+The `alg` parameter, when present,
+defines the `alg` parameter of ARKG derived public keys derived from this ARKG public seed.
 
 The following CDDL [RFC8610] example represents an `ARKG-P256ADD-ECDH` public seed
 restricted to generating derived public keys for use with the ESP256 [fully-spec-algs] signature algorithm:
@@ -975,18 +976,20 @@ restricted to generating derived public keys for use with the ESP256 [fully-spec
 The following is the same example encoded as CBOR:
 
 ~~~
-h'a50139fbb402582060b6dfddd31659598ae5de49acb220d8704949e84d484b68
-  344340e2565337d2032820a40102200121582069380fc1c3b09652134feefba6
-  1776f97af875ce46ca20252c4165102966ebc52258208b515831462ccb0bd55c
-  ba04bfd50da63faf18bd845433622daf97c06a10d0f121a4010220012158205c
-  099bec31faa581d14e208250d3ffda9ec7f543043008bc84967a8d875b5d7822
-  5820539d57429fcb1c138da29010a155dca14566a8f55ac2f1780810c49d4ed7
-  2d58'
+h'a5013a0001000002582060b6dfddd31659598ae5de49acb220d8704949e84d48
+  4b68344340e2565337d2032820a40102200121582069380fc1c3b09652134fee
+  fba61776f97af875ce46ca20252c4165102966ebc52258208b515831462ccb0b
+  d55cba04bfd50da63faf18bd845433622daf97c06a10d0f121a4010220012158
+  205c099bec31faa581d14e208250d3ffda9ec7f543043008bc84967a8d875b5d
+  78225820539d57429fcb1c138da29010a155dca14566a8f55ac2f1780810c49d
+  4ed72d588'
 ~~~
 
 
 ## COSE key reference types {#cose-key-refs}
 
+TODO: This should eventually move to a separate "algoritm IDs for two-party signing" spec, see: [](https://mailarchive.ietf.org/arch/msg/cose/BjIO9qDNbuVinxAph7F-Z88GpFY/)
+
 While keys used by many other algorithms can usually be referenced by a single atomic identifier,
 such as that used in the `kid` parameter in a COSE_Key object or in the unprotected header of a COSE_Recipient,
 users of the function `ARKG-Derive-Secret-Key` need to represent
@@ -1013,7 +1016,7 @@ and restricted for use with the ESP256 [fully-spec-algs] signature algorithm:
                ; kid: Opaque identifier of ARKG-pub
   2: h'60b6dfddd31659598ae5de49acb220d8
        704949e84d484b68344340e2565337d2',
-  3: -9,       ; alg: ESP256
+  3: -65539,   ; alg: ESP256-ARKG
 
                ; ARKG-P256ADD-ECDH key handle
                ; (HMAC-SHA-256-128 followed by
@@ -1032,10 +1035,11 @@ and restricted for use with the ESP256 [fully-spec-algs] signature algorithm:
 The following is the same example encoded as CBOR:
 
 ~~~
-h'a40139fbb502582060b6dfddd31659598ae5de49acb220d8704949e84d484b68
-  344340e2565337d20328205851ae079e9c52212860678a7cee25b6a6d4048219
-  d973768f8e1adb8eb84b220b0ee3a2532828b9aa65254fe3717a29499e9baee7
-  0cea75b5c8a2ec2eb737834f7467e37b3254776f65f4cfc81e2bc4747a84'
+h'a5013a0001000102582060b6dfddd31659598ae5de49acb220d8704949e84d48
+  4b68344340e2565337d2033a00010002205851ae079e9c52212860678a7cee25
+  b6a6d4048219d973768f8e1adb8eb84b220b0ee3a2532828b9aa65254fe3717a
+  29499e9baee70cea75b5c8a2ec2eb737834f7467e37b3254776f65f4cfc81e2b
+  c4747a842158184578616d706c65206170706c69636174696f6e20696e666f'
 ~~~
 
 
@@ -1090,6 +1094,8 @@ $COSE_kty_ref /= -2       ; Value TBD
 
 ## COSE Key Type Parameters Registrations
 
+TODO: These should eventually move to a separate "algoritm IDs for two-party signing" spec, see: [](https://mailarchive.ietf.org/arch/msg/cose/BjIO9qDNbuVinxAph7F-Z88GpFY/)
+
 This section registers the following values in the IANA "COSE Key Type Parameters" registry [IANA.COSE].
 
 - Key Type: TBD (ARKG-pub, placeholder -65537)
@@ -1121,6 +1127,61 @@ This section registers the following values in the IANA "COSE Key Type Parameter
   - Reference: {{cose-key-refs}} of this document
 
 
+## COSE Algorithms Registrations
+
+TODO: These should eventually move to a separate "algoritm IDs for two-party signing" spec, see: [](https://mailarchive.ietf.org/arch/msg/cose/BjIO9qDNbuVinxAph7F-Z88GpFY/)
+
+This section registers the following values in the IANA "COSE Algorithms" registry [IANA.COSE].
+
+- Name: ESP256-ARKG
+  - Value: TBD (Placeholder -65539)
+  - Description: ESP256 with key derived by ARKG-P256ADD-ECDH
+  - Capabilities: \[kty\]
+  - Change Controller: TBD
+  - Reference: [fully-spec-algs], {{ARKG-P256ADD-ECDH}} of this document
+  - Recommended: Yes
+
+- Name: ESP384-ARKG
+  - Value: TBD (Placeholder -65540)
+  - Description: ESP384 with key derived by ARKG-P384ADD-ECDH
+  - Capabilities: \[kty\]
+  - Change Controller: TBD
+  - Reference: [fully-spec-algs], {{ARKG-P384ADD-ECDH}} of this document
+  - Recommended: Yes
+
+- Name: ESP512-ARKG
+  - Value: TBD (Placeholder -65541)
+  - Description: ESP512 with key derived by ARKG-P521ADD-ECDH
+  - Capabilities: \[kty\]
+  - Change Controller: TBD
+  - Reference: [fully-spec-algs], {{ARKG-P521ADD-ECDH}} of this document
+  - Recommended: Yes
+
+- Name: ES256K-ARKG
+  - Value: TBD (Placeholder -65542)
+  - Description: ES256K with key derived by ARKG-P256kADD-ECDH
+  - Capabilities: \[kty\]
+  - Change Controller: TBD
+  - Reference: [RFC8812], {{ARKG-P256kADD-ECDH}} of this document
+  - Recommended: Yes
+
+- Name: Ed25519-ARKG
+  - Value: TBD (Placeholder -65543)
+  - Description: Ed25519 with key derived by ARKG-edwards25519ADD-X25519
+  - Capabilities: \[kty\]
+  - Change Controller: TBD
+  - Reference: [fully-spec-algs], {{ARKG-edwards25519ADD-X25519}} of this document
+  - Recommended: Yes
+
+- Name: Ed448-ARKG
+  - Value: TBD (Placeholder -65544)
+  - Description: Ed448 with key derived by ARKG-edwards448ADD-X448
+  - Capabilities: \[kty\]
+  - Change Controller: TBD
+  - Reference: [fully-spec-algs], {{ARKG-edwards448ADD-X448}} of this document
+  - Recommended: Yes
+
+
 # Design rationale
 
 ## Using a MAC {#design-rationale-mac}
@@ -1206,7 +1267,6 @@ TODO
   - Renamed section "Using HMAC to adapt a KEM without {integrity protection => ciphertext integrity}".
   - Fixed info argument to HMAC in section "Using HMAC to adapt a KEM without ciphertext integrity".
   - Added reference to Shoup for definition of key encapsulation mechanism.
-  - Added CDDL definition of COSE_Key_Ref.
+  - Added CDDL definition of COSE_Key_Ref
   - Editorial fixes to references.
   - Renamed proposed COSE Key Types.
-  - Removed proposed COSE Algorithms registrations.