Safety Housing Protocol (SSH) is a protocol that provides secure remote login and other secure network services on an unsafe network. SSH has three components:
Transportation Protocol [SSH-TRANS] provides server authentication, confidentiality and integrity. In addition, it sometimes provides compression. SSH-TRANS is typically running on TCP / IP connections or on other reliable data streams. SSH-TRANS provides powerful encryption technology, password host authentication and integrity protection. The certification in this agreement is based on the host, and the protocol does not perform user authentication. A higher-level user authentication protocol can be designed to be above this agreement.
User Certification Protocol [SSH-userage] is used to provide client user authentication functions to the server. It runs on the transport layer protocol SSH-TRANS. When SSH-Userage begins, it receives a session identifier (exchange hash h from the first key exchange) from the low-level protocol. The session identifier uniquely identifies this session and applies to marks to prove ownership of the private key.
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