Shouldn't they inspire the end to end encryption from openSSH. As far as I know it's used by many worldwide and it seems fairly secure. Maybe I am missing something though.
This describes how to communicate in such a way where the client 1 and 2 can communicate with the server in the data path and The server being unable to see the contents of the message.
The hard part is key management between clients in a secure way.
In the demos, you can see that the parameter is a # parameter and not a query parameter.
2. OpenSSH doesn't stop sessions for a user whose authorization info had changed, which is what Jitsy tries to change to prevent.