摘要： 讲述了分布式系统认证中报文重播的问题，对目前广泛使用的3种抵御重播机制逐一进行了论述，指出它们的优缺点，最后提出了一种新的可行机制。

关键词: 认证, 时间戳, 分布式系统, 重播

Abstract: This paper addresses the problem of message replay in distributed authenticahon. It discusses the merits and defeats of threemost widely acceptod approaches to the replay attack. At last. it describes a practical implementation of a new approach.

中图分类号: 

• TP309