Journal
IMAGE AND VISION COMPUTING
Volume 27, Issue 8, Pages 1035-1039Publisher
ELSEVIER
DOI: 10.1016/j.imavis.2008.09.004
Keywords
Cryptanalysis; Image encryption; Chaos; Differential chosen-plaintext attack; Randomness test
Categories
Funding
- City University of Hong Kong [7002134]
- Alexander von Humboldt Foundation of Germany
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Recently, an image encryption scheme based on a compound chaotic sequence was proposed. In this paper, the security of the scheme is studied and the following problems are found: (I) a differential chosen-plaintext attack can break the scheme with only three chosen plain-images; (2) there is a number of weak keys and some equivalent keys for encryption; (3) the scheme is not sensitive to the changes of plain-images; and (4) the compound chaotic sequence does not work as a good random number source. (C) 2008 Elsevier B.V. All rights reserved.
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