Cryptanalysis of an Image Encryption Scheme Based on a Compound Chaotic Sequence
arXiv:0712.3964 · doi:10.1016/j.imavis.2008.09.004
Abstract
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: (1) 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 resource.
11 pages, 2 figures