Re: Builtin encryption support in rsync (was Re: I also am getting hang/timeout using rsync 2.4.6 -e ssh)

[Mark W. Eichin]

Instead of making up some hashing key-generation method, please look
at RFC2104 "HMAC" (and the six or seven followup rfc's on specific
instantiations.)

Also, for rsync, I don't see why you'd particularly want a stream
cipher (it isn't interactive, you have "large" packets to work with)
and I might suggest you look at Rijndael, the newly-standardized US
AES...