Discretization of Coupled Map Lattices for a Stream Cipher |
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Authors: | YIN Ruming YUAN Jian YANG Qiuhua SHAN Xiuming WANG Xiqin |
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Institution: | YIN Ruming,YUAN Jian,YANG Qiuhua,SHAN Xiuming,WANG Xiqin Department of Electronic Engineering,Tsinghua University,Beijing 100084,China |
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Abstract: | Coupled map lattices (CML) have been recently used to construct ciphers. However, the complicated operations on real numbers make these CML-based ciphers difficult to analyze. This paper presents a new stream cipher with the discretized CML which operates on binary numbers. When discretizing the CML, the effective network structure is explicitly preserved to improve the confusion and diffusion. The proposed cipher can be easily analyzed using proper cryptographic techniques and has good security. The cipher... |
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Keywords: | stream cipher coupled map lattices confusion and diffusion discretization statistical test |
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