A Hash Function based on Sponge Structure with Chaotic Map for Spinal Codes

A hash function based on sponge structure with chaotic mapping (SSCM) algorithm is designed for spinal codes to degrade high time complexity. The internal permutation function of the designed hash function mainly uses the chaotic mapping including two-dimensional Logistic mapping and two-dimensional Chebyshev mapping. The plaintext messages are transformed into 64-bit hash values with pseudo-randomness through chaotic mapping. The simulation results show that the spinal code with the designed hash function has the lower time complexity compared with the spinal codes using One at a time and Hash-one functions. Moreover, the bit-error-rate (BER) of the designed spinal codes is improved.