Please load the SecureSession.47 and drive it about a bit. I am missing crypto plugins on Pharo, so avoid the performance test, tto stay responsive. Here are some of the changes: - frame-based pipeline - header per msg so no mutable session state - header is written with message in Asn1Der encoding. - most header fields currently optional - adding per-connection msgId to header - timeSent set also - reworked TransportEndpoint to be better scoped. Looking forward: - extend frames into the strategy utilities - events Any issues or questions, please reach out. Thanks, robert