Image Encryption Algorithm Based on Chaotic Mapping and DNA Coding
Liang Ta · Jisuanji gongcheng · 2014
Aiming at the problem of Logistic chaotic mapping that its iteration points are more concentrated and it has poorer ergodicity when used in image encryption,this paper puts forward an improved image encryption algorithm based on Skew Tent chaotic mapping and Deoxyribonucleic Acid(DNA) theory.It uses Skew Tent chaotic mapping to produce two groups of chaotic sequences to scramble the locations of the pixels,then codes the initial scrambled image with DNA theory to make it a DNA sequence,then uses Skew Tent chaotic mapping to produce one sequence to scramble the DNA one,and with DNA inverse transform gets the final encryption image.It simulates and analyzes the proposed algorithm from two aspects including security and scrambling degree,and compared with traditional scrambling methods such as Arnold transformation and Hilbert curve,and the algorithm based on Logistic mapping and DNA theory,the result shows that the algorithm has better encryption features.