关键词: SSH, 安全通信, RSA/DSA, 密钥

Abstract:

In order to improve the security of remote access based on SSH（Secure Shell），and to give consideration to the  efficiency of access. Based on the principle of RSA/DSA（Rivest Shamir Adlemen /Digital Signature Algorithm） password-free certification, three kinds of executive plan about telecommunication security of the parallel computing system based on MPICH（Message-Passing Interface Chameleon） are put forward，which aim at the telecommunication security of the parallel computing system based on MPICH. This research can offer the plans of security and efficiency for the construction of the parallel computing system and the remote access based on SSH.

Key words: secure shell（SSH）, security telecommunication, rivest shamir adlemen/digital signature algorithm（RSA/DSA）, key