Published January 1, 2004
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On the security of a class of discrete-time chaotic cryptosystems
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In this Letter we analyze the security of some recently proposed chaotic cryptosystems and give methods to break the cipher to reveal the encrypted information. The method exploits the dependencies between the parameters and the output sequence of a dynamical system to reveal the secretly shared system parameters. For each encryption scheme a known plaintext attack and a ciphertext only attack are given. (C) 2003 Elsevier B.V. All rights reserved.
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