Secure Shell (SSH) is a cryptographic network protocol for secure data communication, remote command-line login, remote command execution, and other secure network services between two networked computers. It connects, via a secure channel over an insecure network, a server and a client running SSH server and SSH client programs, respectively.
The protocol specification distinguishes between two major versions that are referred to as SSH-1 and SSH-2.
SSH applications created by Codinn are all support SSH-2 protocol.