Over the course of several months, I've been working on the implementation of SecureSessionV1 to adopt new protocol and message frame definitions. As to the original connection protocol and frames, I preserved it as a backwards compatible Vintage implementation. This change simplified a fair bit of code and will allow for some further modifications. I apologize for my habit in using the code and unit tests to document the system, an old habit to try for a self-describing domain language of secure sessions. Please look in SecureSession-Tests for examples in using both the Vintage and V1 protocols. The key classes for the Vintage version remain SecureSessionServer and SecureSessionTerminal, while the V1 version use SecureSessionV1Server and SecureSessionV1Terminal. Here are some helpful links.. The V1 Frame Design is http://jmp.sh/1Uo0dr7, though I should note there are changes to the DataHeader, which holds the mac and the plaintextLength. The code is found in http://www.squeaksource.com/Cryptography and the SecureSession package requires the Cryptography package and for a notable speed improvements the Cryptography plugins build for your VM. - Robert