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JI Wei, LIN Zi, QU Ren hui, XU Chunning, DING Yuwen, LI Dongqi
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Abstract: A parametervarying chaotic encryption scheme based on spatiotemporal twodimensional chaos sequence is proposed in this paper. Oneway coupled mapping lattice model was first used to generate spatiotemporal chaos binary sequence and each performance of the sequence was analyzed, which proves that the chaos sequence has a good pseudorandomicity. On the basis of this, a new parametervarying chaotic encryption algorithm was adopted, with the generated spatiotemporal chaos binary sequence as the original encryption key, to realize the parametervarying chaotic encryption through randomly changing the original parameter, iteration times and system parameter of the chaotic encryption system. Experimental results prove that the random varying of parameters in the chaotic encryption system can increase the complexity and long periodicity of the chaos sequence, so that it has the advantage of fastspeed encryption and high security.
Key words: spatiotemporal chaos, binary sequence, pseudorandomicity, secret key
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JI Wei, LIN Zi, QU Ren hui, XU Chunning, DING Yuwen, LI Dongqi. Parametervarying Chaotic Encryption Algorithm Based onSpatiotemporal Twodimensional Chaos Sequence[J].J4, 2008, 46(02): 320-326.
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http://xuebao.jlu.edu.cn/lxb/EN/Y2008/V46/I02/320
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