Journal
CHINESE PHYSICS B
Volume 23, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/23/3/030503
Keywords
image encryption; shuffle and diffuse simultaneously; block cipher; logistic map
Categories
Funding
- National Natural Science Foundation of China [61370145, 61173183, 60973152]
- Doctoral Program Foundation of Institution of Higher Education of China [20070141014]
- Program for Liaoning Excellent Talents in University, China [LR2012003]
- National Natural Science Foundation of Liaoning Province, China [20082165]
- Fundamental Research Funds for the Central Universities, China [DUT12JB06]
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In this paper, a fast image encryption algorithm is proposed, in which the shuffling and diffusion is performed simultaneously. The cipher- text image is divided into blocks and each block has k Chi k pixels, while the pixels of the plain- text are scanned one by one. Four logistic maps are used to generate the encryption key stream and the new place in the cipher image of plain image pixels, including the row and column of the block which the pixel belongs to and the place where the pixel would be placed in the block. After encrypting each pixel, the initial conditions of logistic maps would be changed according to the encrypted pixel's value; after encrypting each row of plain image, the initial condition would also be changed by the skew tent map. At last, it is illustrated that this algorithm has a faster speed, big key space, and better properties in withstanding differential attacks, statistical analysis, known plaintext, and chosen plaintext attacks.
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