The collision problem of one kind of methods for constructing one-way Hash function based on chaotic map
一类基于混沌映射构造Hash函数方法的碰撞缺陷

Chaos would happen within certain ranges of parameters of chaotic system. The chaos sequence has good pseud random character. Now some papers have provided some methods to construct one-way hash function based on chaotic map. Through analyzing these methods, the appearance of collision is proved. So some key problems are pointed out which should be taken care of while constructing one-way function based on chaotic map.