diff --git a/pkg/node/identity.go b/pkg/node/identity.go
index 67683b8..5417958 100644
--- a/pkg/node/identity.go
+++ b/pkg/node/identity.go
@@ -166,8 +166,8 @@ func (n *NodeManager) GenerateIdentity(name string, role NodeRole) error {
 	return nil
 }
 
-// DeriveSharedSecret derives a shared secret with a peer using X25519 ECDH.
-// The result is hashed with SHA-256 for use as a symmetric key.
+// secret, err := nm.DeriveSharedSecret(peer.PublicKey)
+// smsg.Encrypt(msg, base64.StdEncoding.EncodeToString(secret))
 func (n *NodeManager) DeriveSharedSecret(peerPubKeyBase64 string) ([]byte, error) {
 	n.mu.RLock()
 	defer n.mu.RUnlock()