diff --git a/shared/protos/identity.proto b/shared/protos/identity.proto
--- a/shared/protos/identity.proto
+++ b/shared/protos/identity.proto
@@ -32,6 +32,7 @@
   string deviceID = 2;
   // Message sent to initiate PAKE login (step 1)
   bytes pakeCredentialRequest = 3;
+  string userPublicKey = 4;
 }
 
 message PakeLoginRequest {