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提出了一种基于切延迟椭圆反射腔映射系统(TD-ERCS)的单向Hash函数算法.该算法只需将明文信息线性变换为系统的参数序列,然后让TD-ERCS依次迭代,再依照一定的规则提取Hash值,勿需要增加任何冗余计算.该算法的密钥在[264,2160]内任意取值,输出Hash值长160bit.基础的安全性测试表明,这种Hash函数具有很好的单向性、弱碰撞性、初值敏感性,较其他混沌系统构造的Hash函数具有更强的安全性,且实现简单,运行速度快,是传统Hash函数的一种理想的替代算法.还导出了评估碰撞性的一个客观标准.
A one-way Hash function algorithm based on TD-ERCS is proposed, which only needs to transform the plaintext information into the system parameter sequence linearly, then let TD-ERCS iterate one by one, Of the rules to extract Hash value, do not need to add any redundancy calculation.The key of the algorithm is arbitrary in [264,2160], the output Hash value is 160bit.The basic security test shows that this Hash function has very good Unidirectional, weak collision and initial sensitivity are more secure than Hash functions constructed by other chaotic systems, and they are easy to implement and run fast and are an ideal alternative to traditional Hash functions. An objective criterion for assessing crashworthiness has been derived.