Don't forget Whisper Systems protocol used by TextSecure[1] which is based on Google's protobuf[2] and JSON in a REST api. [1] https://github.com/WhisperSystem

Don't forget Whisper Systems protocol used by TextSecure[1] which is based on Google's protobuf[2] and JSON in a REST api. [1] https://github.com/WhisperSystems/TextSecure-Server/wiki/API-Protocol#user-content-sending-messages https://github.com/WhisperSystems/TextSecure-Server/wiki/API... [2] https://developers.google.com/protocol-buffers/ https://developers.google.com/protocol-buffers/