Synchronizing that info accross your devices is exactly something you'd need a protocol for. If you want to preserve the forward-secrecy that OTR offers, then y

Synchronizing that info accross your devices is exactly something you'd need a protocol for. If you want to preserve the forward-secrecy that OTR offers, then you can't just "encrypt, upload" on one client and "download, decrypt" on another. You somehow need to do a key exchange between your own devices.