I noticed that "no cipher" is not an option in recent open-ssh. I wish there was an option. I'd like to use ssh as a replacement for rsh in rsh machine1 "tar -f - " | rsh machine2 "tar -f - " But for massive file copies, I really don't want to go through encryption. Still, I would like the strong authentication offered by ssh. So I think "cipher none" would be a good choice here.