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混沌序列具有对初值和系统参数敏感等特点,因此非常适合应用于信息加密。本文在详细分析Henon映射的混沌和密码学特性的基础上,提出一种基于Feistel结构和Henon映射混沌分组密码算法,该算法最大的优点加密的轮次和子密钥的构造是基于混沌系统动态更新的,通过子密钥的动态生成,密码系统的随机性、复杂性得到了极大的提高。同时理论和实验表明,该算法具有较高的安全性,能够抵抗差分和线性密码分析。
Chaotic sequences are sensitive to initial values and system parameters, so they are very suitable for information encryption. Based on the analysis of chaotic and cryptographic properties of Henon mapping in detail, this paper proposes a chaos-based block cipher algorithm based on Feistel structure and Henon mapping. The advantage of this algorithm is that rounds and sub-keys are constructed dynamically based on chaotic system dynamic update Through the dynamic generation of sub-keys, the randomness and complexity of the cryptographic system have been greatly improved. At the same time, the theory and experiment show that the algorithm has high security and can resist differential and linear cryptanalysis.