diff --git a/ChangeLog.md b/ChangeLog.md
index eaff456c..bcf02a56 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -2,6 +2,7 @@
   * Added support for the blowfish-ctr algorithm from [RFC 4344](https://datatracker.ietf.org/doc/html/rfc4344)
   * Fix bug where ext-info-c was incorrectly advertised during rekeying
     * According to [RFC 8308 section 2.1](https://datatracker.ietf.org/doc/html/rfc8308#section-2.1), ext-info-c should only advertised during the first key exchange
+  * Address [#77](https://github.com/mwiede/jsch/issues/77) by attempting to add compatibility with older [Bouncy Castle](https://www.bouncycastle.org/) releases
 * [0.1.66](https://github.com/mwiede/jsch/releases/tag/jsch-0.1.66)
   * Added support for [RFC 8308](https://datatracker.ietf.org/doc/html/rfc8308) extension negotiation and server-sig-algs extension
     * This support is enabled by default, but can be controlled via the enable_server_sig_algs config option (or `jsch.enable_server_sig_algs` system property)
diff --git a/src/main/java/com/jcraft/jsch/bc/ChaCha20Poly1305.java b/src/main/java/com/jcraft/jsch/bc/ChaCha20Poly1305.java
index 8ab84dc9..dc548a7e 100644
--- a/src/main/java/com/jcraft/jsch/bc/ChaCha20Poly1305.java
+++ b/src/main/java/com/jcraft/jsch/bc/ChaCha20Poly1305.java
@@ -68,8 +68,8 @@ public void init(int mode, byte[] key, byte[] iv) throws Exception{
     System.arraycopy(key, 0, K_2, 0, bsize/2);
     this.mode=mode;
     try{
-      K_1_spec=new KeyParameter(K_1);
-      K_2_spec=new KeyParameter(K_2);
+      K_1_spec=new KeyParameter(K_1, 0, K_1.length);
+      K_2_spec=new KeyParameter(K_2, 0, K_2.length);
       header_cipher=new ChaChaEngine();
       main_cipher=new ChaChaEngine();
     }
@@ -85,8 +85,8 @@ public void init(int mode, byte[] key, byte[] iv) throws Exception{
   public void update(int foo) throws Exception{
     ByteBuffer nonce=ByteBuffer.allocate(8);
     nonce.putLong(0, foo);
-    header_cipher.init(this.mode==ENCRYPT_MODE, new ParametersWithIV(K_1_spec, nonce.array()));
-    main_cipher.init(this.mode==ENCRYPT_MODE, new ParametersWithIV(K_2_spec, nonce.array()));
+    header_cipher.init(this.mode==ENCRYPT_MODE, new ParametersWithIV(K_1_spec, nonce.array(), 0, nonce.array().length));
+    main_cipher.init(this.mode==ENCRYPT_MODE, new ParametersWithIV(K_2_spec, nonce.array(), 0, nonce.array().length));
     // Trying to reinit the cipher again with same nonce results in InvalidKeyException
     // So just read entire first 64-byte block, which should increment global counter from 0->1
     byte[] poly_key = new byte[32];
diff --git a/src/main/java/com/jcraft/jsch/bc/SignatureEdDSA.java b/src/main/java/com/jcraft/jsch/bc/SignatureEdDSA.java
index a0ae6ff6..872c26d9 100644
--- a/src/main/java/com/jcraft/jsch/bc/SignatureEdDSA.java
+++ b/src/main/java/com/jcraft/jsch/bc/SignatureEdDSA.java
@@ -63,11 +63,11 @@ public void init() throws Exception{
   public void setPubKey(byte[] y_arr) throws Exception{
     try {
       if(getAlgo().equals("Ed25519")){
-        Ed25519PublicKeyParameters pubKey = new Ed25519PublicKeyParameters(y_arr);
+        Ed25519PublicKeyParameters pubKey = new Ed25519PublicKeyParameters(y_arr, 0);
         signature.init(false, pubKey);
       }
       else{
-        Ed448PublicKeyParameters pubKey = new Ed448PublicKeyParameters(y_arr);
+        Ed448PublicKeyParameters pubKey = new Ed448PublicKeyParameters(y_arr, 0);
         signature.init(false, pubKey);
       }
     }
@@ -80,11 +80,11 @@ public void setPubKey(byte[] y_arr) throws Exception{
   public void setPrvKey(byte[] bytes) throws Exception{
     try {
       if(getAlgo().equals("Ed25519")){
-        Ed25519PrivateKeyParameters prvKey = new Ed25519PrivateKeyParameters(bytes);
+        Ed25519PrivateKeyParameters prvKey = new Ed25519PrivateKeyParameters(bytes, 0);
         signature.init(true, prvKey);
       }
       else{
-        Ed448PrivateKeyParameters prvKey = new Ed448PrivateKeyParameters(bytes);
+        Ed448PrivateKeyParameters prvKey = new Ed448PrivateKeyParameters(bytes, 0);
         signature.init(true, prvKey);
       }
     }
diff --git a/src/main/java/com/jcraft/jsch/bc/XDH.java b/src/main/java/com/jcraft/jsch/bc/XDH.java
index da06b158..e6e306b3 100644
--- a/src/main/java/com/jcraft/jsch/bc/XDH.java
+++ b/src/main/java/com/jcraft/jsch/bc/XDH.java
@@ -69,7 +69,7 @@ public byte[] getSecret(byte[] Q) throws Exception{
     if(name.equals("X25519")){
       X25519PublicKeyParameters publicKey = null;
       try{
-        publicKey = new X25519PublicKeyParameters(Q);
+        publicKey = new X25519PublicKeyParameters(Q, 0);
       }
       catch(Exception e){
         throw new InvalidKeyException(e);
@@ -86,7 +86,7 @@ public byte[] getSecret(byte[] Q) throws Exception{
     else{
       X448PublicKeyParameters publicKey = null;
       try{
-        publicKey = new X448PublicKeyParameters(Q);
+        publicKey = new X448PublicKeyParameters(Q, 0);
       }
       catch(Exception e){
         throw new InvalidKeyException(e);