一种新的双向认证的一次性口令系统TAOTP

一次性口令系统是目前网上流行的简单用户认证方案，能够有效解决用户密码在网上明文传送的不安全性。分析了现有的几种一次性口令系统，指出服务端的不安全性、对S/KEY的小数攻击等问题，在此基础上提出并实现了双向认证一次性口令协议TAOTP（Twoway Authenticate One Time Password），采用单向函数，通过客户端和服务端实现的双向认证，解决了服务端存储用户口令的不安全性和小数攻击等问题。

A Type of New Two-way Authenticate One-time Password System

One-time password systems are popular simple user-authentication schemes in Internet. It can effectively resolve the un-secure way of password transfer in plan-text in Internet. This paper discussed some one-time password system, point out the defects such as un-secure server, small integer attack on S/KEY system, and so on. Also in this paper, by using hash function and implementation of client and server's two-way authentication, a framework of two-way authenticate one-time password system was carried out. It can resolve problems such as un-secure server and small integer attack.