Abstract: Symmetric encryption scheme is proposed based on two symmetric-keys. By mean of a very sensitive function with a private key and a changeable “public key”, the proposed scheme has a function similar to one-time pad scheme. Using a Lorenz system with mode function illustrates how to realize such encryption scheme. Theoretical analysis and experimental results demonstrate that the new scheme can increase the security of traditional encryption scheme and be easy to be realized.

Key words: two symmetric-keys, chaos, symmetric encryption, sensitive function

摘要： 在对混沌加密和传统加密特性进行分析的基础上，该文提出一个基于双密钥的对称加密方案，该方案通过一个对密钥极其敏感的函数及一个公开的动态密钥，可以实现类似于“一次一密”的加密目标。给出一个基于Lorenz混沌系统的实现方案，理论分析和实验结果表明，该方案可以提高传统加密方案的安全性能，并且实现简单。

关键词: 双密钥, 混沌, 对称加密, 敏感函数

CLC Number: 

• TP309