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电子学报  2014 

基于多因子CSE算法的AESS-盒电路优化设计

DOI: 10.3969/j.issn.0372-2112.2014.06.032, PP. 1238-1243

Keywords: AES,S-盒,多因子CSE算法

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Abstract:

针对高级加密标准(AES)S-盒优化,提出了一种新的多因子公共项消除(CSE)优化算法.多因子CSE算法通过对组合逻辑表达式中所含因子最多的公共项优先消除,以简化逻辑表达式,从而有效地减少S-盒电路结构中的GF(2^4)域乘法逆电路和映射矩阵电路的面积和时延.结果表明,多因子CSE算法具有计算速度快,优化效率高的特点.优化后的S-盒组合逻辑电路采用0.18μmCMOS工艺,设计出的S-盒面积-延时积比目前最小面积和最短延时的S-盒组合逻辑电路分别减少了10.32%和19.64%.

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