基于时空混沌系统构造Hash函数

Construction of Hash Function Based on Spatiotemporal Chaotic Systems

提出一种基于时空混沌系统的单向H ash函数构造方法.该方法通过使用单向耦合映射格子和基于迭代Log istic映射的初始状态生成函数实现明文和密钥信息的混淆和扩散,并基于密码块连接方式产生任意长度明文的128位H ash值.理论分析和实验表明,提出的H ash函数满足H ash函数所要求的单向性、初值以及密钥敏感性和抗碰撞性等安全性能要求.

A one-way Hash function is constructed based on spatiotemporal chaotic systems. The one-way coupled map lattices（OCMLs） and initial condition generation function based on iterative Logistic map are used to realized the data confusion and diffusion between plain-text and key information. And the cipher block chaining mode is used to generate the 128-bit Hash value for plaint-text with arbitrary length. Theoretical analysis and experimental results indicate that the proposed algorithm can satisfy the required security performance, such as one-way, initial value and key sensitivity and collision resistance.