期刊
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
卷 30, 期 4, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218127420500601
关键词
Chaos; image encryption; random walk; hyperchaos; block image
资金
- National Natural Science Foundation of China [61971185]
- Open Fund Project of Key Laboratory in Hunan Universities [18K010]
In this paper, we propose an image encryption algorithm based on random walk and two hyperchaotic systems. The random walk method is adopted to scramble the position of pixels within a block. Furthermore, the permutation operation between blocks is presented to enhance the scramble effect. Thus, high correlation among pixels of original image is broken by permutation. Moreover, the chosen plaintext attack is used to test the anti-attack ability of the proposed algorithm. By analyzing experimental results arid comparing with other image encryption algorithms, we show that the proposed algorithm has better performance and higher security.
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