DESIGN OF CHAOTIC PSEUDO-RANDOM BIT GENERATOR AND ITS APPLICATIONS IN STREAM-CIPHER CRYPTOGRAPHY

Xing-Yuan Wang () and Xiao-Juan Wang ()
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Xing-Yuan Wang: School of Electronic and Information Engineering, Dalian University of Technology, Dalian, 116024, China
Xiao-Juan Wang: School of Electronic and Information Engineering, Dalian University of Technology, Dalian, 116024, China

International Journal of Modern Physics C (IJMPC), 2008, vol. 19, issue 05, 813-820

Abstract: Because of the sensitivity of chaotic systems on initial conditions/control parameters, when chaotic systems are realized in a discrete space with finite states, the dynamical properties will be far different from the ones described by the continuous chaos theory, and some degradation will arise. This problem will cause the chaotic trajectory eventually periodic. In order to solve the problem, a new binary stream-cipher algorithm based on one-dimensional piecewise linear chaotic map is proposed in this paper. In the process of encryption and decryption, we employ a secret variant to perturb the chaotic trajectory and the control parameter to lengthen the cycle-length of chaotic trajectory. In addition, we design a nonlinear principle to generate a pseudo-random chaotic bit sequence as key stream. Cryptanalysis shows that the cryptosystem is of high security.

Keywords: Chaos; encryption; stream-cipher; 0545 (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (2)

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DOI: 10.1142/S0129183108012479

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