One way Hash function construction based on the extended chaotic maps switch

How to design an efficient one-way Hash function is always the hot point in modem cryptography researches. In this paper, a Hash function construction method based on extended chaotic maps switch is proposed. The extended chaotic model is first built to generate various kinds of chaotic signals at different parts of the original signals according to the switching schemes, and then chaotic parameters of one-way Hash function is modulated by the linear-transformed signals. The advantages of irreversibility, resistance to imitations and sensitivity to initial values, etc., are also discussed. Simulation results show that this chaotic Hash function based on extended chaotic maps switch has good one-way,weak collision property, better security than the chaotic Hash function based on single chaotic map, and it can be realized easily.