Cryptanalysis on an image block encryption algorithm based on spatiotemporal chaos

doi:10.1088/1674-1056/21/6/060502

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
Revised: 11 December 2011
Accepted manuscript online:

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

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Wang Xing-Yuan(王兴元) and He Guo-Xiang(何国祥) Cryptanalysis on an image block encryption algorithm based on spatiotemporal chaos 2012 Chin. Phys. B 21 060502

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Cryptanalysis on an image block encryption algorithm based on spatiotemporal chaos

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