Ubuntu主机中双因素认证的安全研究与试验

文中首先简要介绍了信息网络安全的五个主要组成部分；接着介绍了目前在系统登录时主要采用的安全方案，然后扼要地解释了双因素认证技术在系统登录时运行的基本原理；最后，详细介绍了在实验环境下，双因素认证技术在Ubuntu系统的应用及实验结果。

Double Factors the Authentication was Researched and Applied in Ubuntu OS

At present, administrator or user who is often log in the operation system just use simple static password on. Double factors the authentication is a protection measures for administrator and user＇ s password. This technology provides two parts password, part of password is static password which administrator need to remember, the other part of password is dynamic password that dynamic password code generates. The dynamic password changes a once after regular interval of time, Administrator or user need to input two parts password, including static password and dynamic password. Although this technology, host security has a great improved.