Journal
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
Volume 14, Issue 2, Pages 574-581Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2007.10.011
Keywords
Chaos; Multiple chaotic systems; Dynamic sequences; Block encryption
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Funding
- Chinese National Natural Science Foundation [60573172]
- Superior University Science Technology [20040081]
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A block encryption algorithm using dynamic sequences generated by multiple chaotic systems is proposed in this paper. In this algorithm, several one-dimension chaotic maps generate pseudo-random sequences, which are independent and approximately uniform. After a series of transformations, the sequences constitute a new pseudo-random sequence uniformly distributing in the value space, which covers the plaintext by executing Exclusive-OR and shifting operations some rounds to form the cipher. This algorithm makes the pseudo-random sequence possess more concealment and noise like characteristic, and overcomes the periodic malpractice caused by the computer precision and single chaotic system. Simulation results show that the algorithm is efficient and useable for the security of communication system. (c) 2007 Elsevier B.V. All rights reserved.
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