摘要： ：首先介绍了SSH协议的特点及研究意义，接着对SSH协议的传输、认证、连接3层模型结构以及SSH协议相关的基本概念进行了研究和分析，并指出实现SSH协议时的注意事项；然后介绍了SSH协议的发展和应用，以及SSH提供的主要安全服务；最后归纳总结了SSH协议本身存在的若干缺陷和不足，以备实际操作过程中参考和注意。

关键词: SSH, 网络安全, 发展, 协议

Abstract: SSH is a protocol for secure remote login and other secure network services over an insecure network. It consists of three major components: transport layer protocol,user authentication protocol and connection protocol. SSH provides many powerful security services such as authentication both for server and client, traffic confidentiality protection and data integrity verification etc.This dissertation explains the three layers and extension of SSH protocol in detail,and introduces basic conceptions and points out many weaknesses of SSH. More important, many valuable suggestions are proposed.

中图分类号: 

• TP393.04