Method to identify the random-like property of chaotic sequences
混沌序列类随机性的一种判定方法

A method of identifying the strength of random-like property of chaotic sequence was proposed with the rate of exhaustive history in sequence production. The step number of exhaustive history in producing process of a sequence was calculated first, and then the rate of exhaustive history was gotten according to the length of the sequence. The method does not need phase space construction, and is adapted to discrete chaotic system and continual chaotic system. It is more significant in digital chaos secret communication. Simulation result shows that the method is valid to identify the strength of random-hke property of different chaotic sequences.