A Novel Hash Function Based on Hyperchaotic Lorenz System

This paper presented a novel iterated hash function based on a four-dimensional (4D) hyperchaotic Lorenz system by introducing a simple state feedback controller. Besides, a double-pipe structure was employed to design hash function in order to obtain the better cryptographic properties. This function encodes a message of arbitrary length into a hash value with a fixed 128-bit length. Theoretical analysis and computer simulation indicate that the proposed hash function possesses the advantages of irreversibility, weak collision and flexibility. Some of performance analysis such as one-way property analysis and attacks resistance analysis are conducted and the results show that the proposed has function hash desirable security properties.