| Theoretical design for a class of chaotic stream cipher based on nonlinear coupled feedback |
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| 作者姓名： | Hu Guojie Wang Lin & Feng Zhengjin . Mobile Division ZTE corporation Shanghai P. R. China . |
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| 作者单位： | Hu Guojie 1，Wang Lin 2 & Feng Zhengjin 21. Mobile Division，ZTE corporation，Shanghai 201203，P. R. China;2. Department of Mechanical Engineering，Shanghai Jiaotong University，Shanghai 200030，P. R. China |
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| 摘 要： | 1.INTRODUCTION Inordertoimprovethesecurityofchaosencryption system,wecaniteratethechaossystem.Themore chaossystemiterates,themorecomplexitbecomes, andthemoresecurethecorrespondingchaosencryp tionsystembecomes.Zhouetal1]proposedaclassof chaoticsequencegeneratorinwhichthelinearseg mentnumberincreasedwiththeiterationnumberex ponentially.Withtheincreaseoftheiterationnum ber,thesecurityofthesystemincreaseswhilethe rateofencoding/decodingdecreases.Inaddition,the phase spacegraphhassomedefe…
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Theoretical design for a class of chaotic stream cipher based on nonlinear coupled feedback |
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| Hu Guojie ,Wang Lin & Feng Zhengjin . Mobile Division,ZTE corporation,Shanghai ,P. R. China,..Theoretical design for a class of chaotic stream cipher based on nonlinear coupled feedback[J].Journal of Systems Engineering and Electronics,2005,16(1). |
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| Authors: | Hu Guojie Wang Lin Feng Zhengjin |
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| Institution: | 1. Mobile Division, ZTECorporation, Shanghai 201203, P. R. China
2. Department of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, P. R. China |
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| Abstract: | A class of chaotic map called piecewise-quadratic-equation map to design feedback stream cipher is proposed.Such map can generate chaotic signals that have uniform distribution function, δ-like autocorrelation function. Compared with the piecewise-linear map, this map provides enhanced security in that they can maintain the original perfect statistical properties, as well as overcome the defect of piecewise-linearity and expand the key space. This paper presents a scheme to improve the local complexity of the chaotic stream cipher based on the piecewise-quadratic-equationmap.Both the theoretic analysis and the results of simulation show that this scheme improves the microstructure of the phasespace graph on condition that the good properties of the original scheme are remained. |
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| Keywords: | chaos stream cipher nonlinear-coupled feedback phase-space graph |
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