Using formal method to analyze security protocol is a valid method to the analysis of security protocols. In recent years, a lot of formal methods appeared.
采用形式化方法分析安全协议是协议分析的有效手段，近年来，出现了众多的研究方法。
This paper proposes a new simple trace semantics that can be used to specify security properties, this technique supports a protocol designer to provide formal analysis of the security properties.
本文提出了一种新的简单的迹语义，用于刻画协议部分安全性质，即只针对协议规约的单个主体，此技术支持协议设计者对安全性质进行形式化规约。
Used BAN logic, the objective and the security of this protocol are proved by formal analysis process.
采用BAN逻辑对该协议进行形式化分析表明：协议达到了认证和密钥分配的目标，具有较强的安全性。
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