SSH

SSH simply is a point to point encrypted connection that acts much like rsh or telnet. It was originally written by Tatu Ylönen (who later started "SSH Communication Security"). This version is referred to as SSH v1 protocol. A later modification to the protocol to improve security is referred to as v1.5. Later Tatu turned over the next version of the protocol to the IETF which is referred to as v2 protocol.

In any respects, all three versions use public key in order to ensure encryption.

[.. Discuss v1, v1.5 and v2 differences in how SSH keys are used ..]

[.. Discuss the difference between RSA1, RSA and DSA keys ..]

[.. Discuss how to use user public keys for v1.x and v2.x ..]

[.. List different SSH versions ..]