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多态密码机制的改进及其严格雪崩特性分析

Keywords: 密码,单向函数,密钥,严格雪崩准则

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Abstract:

C.B.Roellgen多态密码机制(PMC)广泛应用于磁盘文件的加密,具有强安全性和高速性等优点,但不适用于复杂的网络应用环境.针对该问题对PMC进行了改进,提出了满足严格雪崩准则(SAC)的强单向函数和构造S盒的新方法,使构造满足SAC函数的方法更加方便快捷.最后从满足SAC方面分析和验证了该方法的安全性.实验结果表明,改进后的PMC能快速而大量地产生符合密码学特性的长周期序列,并形成网络环境中通信双方会话的对称密钥.

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