The Os/2 versions of Rsync and ssh don't work together !
Are you sure? Have you tried?
If that's true, that's stupid and should be fixed.
And even if they did data wouldn't be encrypted at the end point ?
Oh. Well sorry, I thought you trust the remote server, but don't trust the data channel. It's partly hard to understand what you say for me.
If you don't trust the remote, you can indeed use an AEFS container or a passworded RAR archive.
But you will have to transfer the whole container/archive even if you change one byte in it (at least that's how good encryption should work), as it changes fully. Therefore I don't get where are you going to apply rsync in this case.
Or are you going to encrypt each file separately?