Novel Hash Function Based on Coupled Chaotic Map Lattices

Hash function has been widely used in cryptographic field. This paper proposes a Hash function based on complexly Coupled chaotic map latices (CCML). It is equipped with new features of parallel and flexible processing. Parallelism indicates that the algorithm can reach high level of efficiency and speed. Flexibility means the length of Hash function and message block processed each time can be easily changed to adapt to practical demand. Experimental results show that the Hash function is one-way, with high plaintext sensitivity, as well as its strong capability for confusion and diffusion, and collision resistance. In comparison with MD5 and another Hash function based on chaos, the proposed Hash function shows good performance.