Cryptanalysis of a cryptosystem based on discretized two-dimensional chaotic maps |
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Authors: | Ercan Solak,Cahit Ç okal |
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Affiliation: | Department of Computer Engineering, Isik University, Istanbul, Turkey |
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Abstract: | Recently, an encryption algorithm based on two-dimensional discretized chaotic maps was proposed [Xiang et al., Phys. Lett. A 364 (2007) 252]. In this Letter, we analyze the security weaknesses of the proposal. Using the algebraic dependencies among system parameters, we show that its effective key space can be shrunk. We demonstrate a chosen-ciphertext attack that reveals a portion of the key. |
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Keywords: | 05.45.Vx |
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