数字签名技术中混沌哈希函数的构造与分析

Spatiotemporal chaotic Hash function construction and analysis in digital signature

为了解决现有的基于混沌的Hash函数构造方法中存在的问题,提高Hash函数的性能,提出了一种用于数字签名技术的时空混沌Hash函数构造方法。该方法将交叉耦合映象格子和扩展帐篷映射相结合的混沌系统作为主模块,并利用logistic映射构造密钥生成器。实验表明,该方案很好地达到了Hash函数的各项性能要求,安全性能良好,执行效率高,并具有可扩展性,具有成为一种安全实用的单向Hash函数的潜力。

In order to solve the problems in Hash function construction based on chaotic system and improve the performance of Hash function,this paper presents a spatiotemporal chaotic Hash function construction for digital signature.The crossing coupled map lattice is combined with expanded tent map as a main module,and the logistic map is used as a key generator.Experimental results show that the proposed algorithm satisfies all the performance requirements of Hash function and the algorithm is an implemented Hash function with high security and extensibility.