Introduction
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RSA is currently considered the standard.
Determine version of RSA installed.
Tin-Phams-iMac:~ tinpham$ ssh -V OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009 Tin-Phams-iMac:~ tinpham$ sshd -v sshd: illegal option -- v OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009 usage: sshd [-46DdeiqTt] [-b bits] [-C connection_spec] [-f config_file] [-g login_grace_time] [-h host_key_file] [-k key_gen_time] [-o option] [-p port] [-u len] Tin-Phams-iMac:~ tinpham$
Resources
http://www.ibm.com/developerworks/library/l-keyc.html - pretty good article, I think I can improve it, shorter, clearly show when running on client or server.