Cryptanalysis of a cryptosystem based on discretized two-dimensional chaotic maps
MetadataShow full item record
CitationSolak, E., & Çokal, C. (2008). Comment on "encryption and decryption of images with chaotic map lattices" [ chaos 16 , 033118 ( 2006 ) ]. Chaos: An Interdisciplinary Journal of Nonlinear Science, 18(3), 038101-038101-3. doi:10.1063/1.2966114
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.