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Cryptanalysis of an image encryption scheme

[+] Author Affiliations
Shujun Li

The Hong Kong Polytechnic University, Department of Electronic and Information Engineering, Hung Hom, Kowloon, Hong Kong, China

Chengqing Li

City University of Hong Kong, Department of Electronic Engineering, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China

Kwok-Tung Lo

The Hong Kong Polytechnic University, Department of Electronic and Information Engineering, Hung Hom, Kowloon, Hong Kong, China

Guanrong Chen

City University of Hong Kong, Department of Electronic Engineering, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China

J. Electron. Imaging. 15(4), 043012 (November 14, 2006). doi:10.1117/1.2360697
History: Received December 01, 2005; Revised July 09, 2006; Accepted July 12, 2006; Published November 14, 2006
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We present cryptanalysis of an image encryption scheme, which is based on the base-switching (BS) lossless compression algorithm. The following conclusions are reached: 1. the size of the key space, i.e., the security against brute-force attacks, was greatly overestimated by the designers; and 2. the scheme is not secure against known/chosen-plaintext/ciphertext attacks. A real example is given to show the feasibility of a proposed chosen-plaintext attack. In addition, some other minor problems of the joint compression-encryption scheme are also pointed out.

© 2006 SPIE and IS&T

Citation

Shujun Li ; Chengqing Li ; Kwok-Tung Lo and Guanrong Chen
"Cryptanalysis of an image encryption scheme", J. Electron. Imaging. 15(4), 043012 (November 14, 2006). ; http://dx.doi.org/10.1117/1.2360697


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