SSH protocol is a secure communication method between computers, using SSH-key-pairs for data privacy and integrity. The SSH key pair consists of two related key files:

• A public key installed on the system that grants access (the server)
• A private key installed on the system requests access (the client)

A client administrator creates the keys, installs and secures the private key on the client system, and sends the public key to the server administrator for installation on the server system.