Journal
CHINESE PHYSICS B
Volume 25, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/25/10/100503
Keywords
genetic recombination; memristive hyperchaotic system; color image encryption; confusion; diffusion
Categories
Funding
- National Natural Science Foundation of China [61203094, 61305042]
- Natural Science Foundation of the United States [CNS-1253424, ECCS-1202225]
- Science and Technology Foundation of Henan Province, China [152102210048]
- Foundation and Frontier Project of Henan Province, China [162300410196]
- Natural Science Foundation of Educational Committee of Henan Province, China [14A413015]
- Research Foundation of Henan University, China [xxjc20140006]
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Recently, many image encryption algorithms based on chaos have been proposed. Most of the previous algorithms encrypt components R, G, and B of color images independently and neglect the high correlation between them. In the paper, a novel color image encryption algorithm is introduced. The 24 bit planes of components R, G, and B of the color plain image are obtained and recombined into 4 compound bit planes, and this can make the three components affect each other. A four-dimensional (4D) memristive hyperchaotic system generates the pseudorandom key streams and its initial values come from the SHA 256 hash value of the color plain image. The compound bit planes and key streams are confused according to the principles of genetic recombination, then confusion and diffusion as a union are applied to the bit planes, and the color cipher image is obtained. Experimental results and security analyses demonstrate that the proposed algorithm is secure and effective so that it may be adopted for secure communication.
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