一种改进的基于时空混沌系统的Hash函数构造方法  

Modified Algorithm for Hash Function Based on the Spatiotemporal Chaotic System

作　　者：张向华[1] 

机构地区：[1]重庆教育学院,重庆400067

出　　处：《计算机科学》2009年第7期252-255,共4页Computer Science

基　　金：重庆市教委资助项目(KJ071504)资助

摘　　要：首先介绍了一种以时空混沌为基础的构造Hash函数的典型方案,并分析了它的不足和安全性问题。在此基础上提出了一种改进的Hash函数构造方法。理论和仿真实验分析表明,该算法具有更好的统计特性和更高的效率,有效地弥补了原算法中存在的碰撞漏洞。A class scheme of hash function was introduced and the flaws and security holes were pointed out. Then,a modified algorithm for one-way Hash function construction based on the spatiotemporal chaotic system was proposed. Analysis shows that the proposed algorithm has better statistics performance and efficiency, and remedies the security holes of the original algorithm.

关 键 词：HASH函数 时空混沌系统 耦合映象格子 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]