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Chin. Phys. B, 2012, Vol. 21(6): 060502    DOI: 10.1088/1674-1056/21/6/060502
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Cryptanalysis on an image block encryption algorithm based on spatiotemporal chaos

Wang Xing-Yuan, He Guo-Xiang
Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China
Abstract  An image block encryption scheme based on spatiotemporal chaos has been proposed recently. In this paper, we analyse the security weakness of the proposal. The main problem of the original scheme is that the generated keystream remains unchanged for encrypting every image. Based on the flaws, we demonstrate a chosen plaintext attack for revealing the equivalent keys with only 6 pairs of plaintext/ciphertext used. Finally, experimental results show the validity of our attack.
Keywords:  encryption      spatiotemporal chaos      chosen plaintext attack      equivalent keys     
Received:  09 August 2011      Published:  01 May 2012
PACS:  05.45.-a (Nonlinear dynamics and chaos)  
  05.45.Ac (Low-dimensional chaos)  
  05.45.Vx (Communication using chaos)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61173183, 60973152, and 60573172), the Doctoral Program Foundation of Institution of Higher Education of China (Grant No. 20070141014), and the Natural Science Foundation of Liaoning Province, China (Grant No. 20082165).
Corresponding Authors:  Wang Xing-Yuan, He Guo-Xiang     E-mail:  wangxy@dlut.edu.cn; hegxabc@126.com

Cite this article: 

Wang Xing-Yuan, He Guo-Xiang Cryptanalysis on an image block encryption algorithm based on spatiotemporal chaos 2012 Chin. Phys. B 21 060502

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