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《Acta Electronica Sinica》 2009-01
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Research on Entropy Preservability of S-Box

LIU Fu-yun,XIAO Hong,XIAO Guo-zhen (State Key Laboratory of Integrated Services Network,Xidian University,Xi'an,Shaanxi 710071,China)  
In this paper the entropy preservability of S-Box is discussed and the definitions of condition entropy and entropy preservability of nonlinear S-Box and combining function are presented.Then the sufficient and necessary conditions for judging combining function or S-Box between condition entropy and correlation immunity and the ideal entropy preservability condition of combining function and S-Box are given.Finally,the applied entropy preservability conditions of combining function and S-Box are obtained through analyzing the inherent relation between entropy and Walsh spectrum.
【Fund】: 国家自然科学基金(No.60603010);; 陕西省自然科学基金(No.2006F19);; 信息安全国家重点实验室开放课题(No.03-06)
【CateGory Index】: TN918.1
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Chinese Journal Full-text Database 9 Hits
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5 YUAN Hao,HE Bo,LI Min Laboratory of Electronic Commerce and Modern Logistics,Chongqing University of Post and Telecommunication,Chongqing 400065,China;Method for generating S-box based on spatiotemporal chaos[J];Computer Engineering and Applications;2010-07
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