简要介绍基于时间、基于事件同步、非同步认证原理，分析了动态认证技术安全性。

This paper first introduces principles of synchronous and asynchronous identification based on time and events, and then gives a through analysis of security in dynamic identification techniques.

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装备系统的动态行为特征使其安全性分析工作复杂而困难。

Dynamic behaviors of equipment systems make the job of safety analysis very complex and hard.

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最后提出一种基于公钥密码和中国剩余定理的动态口令验证方案，进行方案安全性及性能的分析。

A dynamic password authentication which is based on the Chinese remainder theorem and RSA public-key cryptography are represented. Finally analysis is made on the scheme security and feasibility.

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