Breaking a Chaotic Cryptographic Scheme Based on Composition Maps
arXiv:0907.3177 · doi:10.1142/S0218127410027192
Abstract
Recently, a chaotic cryptographic scheme based on composition maps was proposed. This paper studies the security of the scheme and reports the following findings: 1) the scheme can be broken by a differential attack with chosen-plaintext, where is the size of plaintext and is the number of different elements in plain-text; 2) the scheme is not sensitive to the changes of plaintext; 3) the two composition maps do not work well as a secure and efficient random number source.
9 pages, 7 figures
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