Journal
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
Volume 30, Issue 4, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218127420500601
Keywords
Chaos; image encryption; random walk; hyperchaos; block image
Funding
- National Natural Science Foundation of China [61971185]
- Open Fund Project of Key Laboratory in Hunan Universities [18K010]
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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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