nisse@lysator.liu.se (Niels Möller) writes:
Currently, arcfour is the only supported stream cipher (they seem to be out of fashion, are thare any other stream ciphers in use? A5 maybe?)
There are newer stream ciphers, mostly due to eSTREAM:
http://www.ecrypt.eu.org/stream/
I don't understand the rationale for stream ciphers today though. The traditional argument for stream ciphers was speed but you get 10GBps+ with nice modes like AES-GCM. Further, you can build a secure key stream generator from any secure block cipher (see for example [1]).
Maybe the argument today is cost of hardware, but for that to be effective in the long run you have to beat Moore's law.
/Simon
[1] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/kfb/kfb-s...