An Extensible Hash Function Construction Based on Embedded Chaos Maps

Based on chaotic Tent map, this paper proposed a new 5×L (L≥32) bits extensible Hash function with symmetric keys. The structure only performed Boolean algorithm and shift operation. In order to generate fast diffusion, confusion and avalanche effect, Chaos series were embedded in the whole algorithm. The security against statistical attack, birthday attack were analyzed in detail. Many simulations were shown that the Hash value was highly sensitive to initial condition and parameter, and also to a message bit. Performance comparisons with MD5 showed that this scheme was a feasible scheme, and can be applied in e-commerce.