Like many other modern authentication systems, the next generation of SSH authorization solutions seems to be evolving around the use of certificates. Of these approaches, SSH keys are the most universally accepted and used. Keys, passwords, and certificates may all be used for SSH authentication. Today, Telnet, one of the Internet’s first remote login protocols and in use since the 1960’s, has largely been supplanted by SSH, owing to the latter protocol’s enhanced security features.

Transferring files from computer to computer.Logging into remote computers/servers for support and maintenance.The technology is typically used by administrators for several functions including: SSH technology is based on the client-server model and provides an ideal way to access remote devices over unsecured networks, like the Internet. The Secure Shell, and the public-key cryptography (an encryption schema using two keys: one public, one private) SSH keys use, is designed to provide strong, encrypted verification and communication between the user and a remote computer. Overview of SSH Key Security Authentication