Abstract: Combining the advantages of chaotic coupled system and conventional one-way hash algorithm, a new keyed one-way hash function was presented. In the proposed approach, chaotic coupled system was made by Tent map and Logistic chaotic map, which produced chaotic data as dynamic parameters that replaced the fixed parameters of conventional hash function. The experimental results show that this method has large key space, strong one-way property, and sensitivity to the initial conditions and keys.

Key words: chaotic, hash algorithm, dynamic parameter, one-way property, sensitivity

摘要： 结合双混沌系统以及传统散列函数的优点，提出一种新的带密钥单向散列函数的构造方法。该方法将帐篷映射和Logistic混沌映射结合组成双混沌系统生成混沌序列，作为动态参数代替传统散列算法中的固定参数参与轮函数的运算并生成散列摘要。结果表明，所提方法具有较大的密钥空间，很好的单向性，初值和密钥敏感性。

关键词: 混沌, 散列算法, 动态参数, 单向性, 敏感性