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Chin. Phys. B, 2014, Vol. 23(3): 030503    DOI: 10.1088/1674-1056/23/3/030503
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A fast image encryption algorithm based on only blocks in cipher text

Wang Xing-Yuan, Wang Qian
Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Abstract  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×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.
Keywords:  image encryption      shuffle and diffuse simultaneously      block cipher      logistic map     
Received:  12 July 2013      Published:  15 March 2014
PACS:  05.45.Gg (Control of chaos, applications of chaos)  
  05.45.-a (Nonlinear dynamics and chaos)  
  05.45.Vx (Communication using chaos)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61370145, 61173183, and 60973152), the Doctoral Program Foundation of Institution of Higher Education of China (Grant No. 20070141014), the Program for Liaoning Excellent Talents in University, China (Grant No. LR2012003), the National Natural Science Foundation of Liaoning Province, China (Grant No. 20082165), and the Fundamental Research Funds for the Central Universities, China (Grant No. DUT12JB06).
Corresponding Authors:  Wang Xing-Yuan     E-mail:  wangxy@dlut.edu.cn;wq605053@163.com

Cite this article: 

Wang Xing-Yuan, Wang Qian A fast image encryption algorithm based on only blocks in cipher text 2014 Chin. Phys. B 23 030503

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