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时间:2019-05-31
《基于Frobenius映射的快速标量乘算法》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据计算机研究与发展ISSN1000—12391CN1l一1777/TPJournalofComputerResearchandDevelopment45(9):1561~1566。2008基于Frobenius映射的快速标量乘算法殷新春h2侯红祥1谢立21(扬州大学信息工程学院江苏扬州225009)2(南京大学计算机软件新技术国家重点实验室南京210093)(xeyin@yzu.edu.cn)FastScalarMultiplicationAlgorithmBasedonFrobeniusMappin
2、gYinXinchunl~,HouHongxian91,andXieLi21(SchoolofInformationandEngineering,YangzhouUniversity,Yangzhou,Jiangsu225009)1(StateKeyLaboratoryforNovelSoftwareTechnology,NanjingUniversity,Nanjing210093)AbstractEllipticcurvecryptosystem(ECC)isanovelpublickeycryptos
3、ystem,whichwillbetheprimarystandardforapplicationinthefuture.ThecapabilityofECCdependsontheefficiencyofscalarmultiplication.Furthermore,fastscalarmultiplicationalgorithmonKoblitzcurveisthetopdemandingtaskintheresearchofscalarmultiplication.Afterthereductio
4、nofTNAF(k),asuperoperationalgorithmbasedonFrobeniusmappingisproposed,whichisCombalgorithm.Atpre-computestage,inordertoestablishapre-computetable,thealgorithmcalculatesthecoordinateofsomepointsonellipticcurvecorrespondingtoanysequenceatafixedlengthof,.witht
5、hehelpofFrobeniusmapping.Ontheotherhand,atevaluationstage,thealgorithmemploysthereductionofTNAF(k)aswellasthepre—computetabletoimprovetheefficiencyofthewholeCombalgorithm.BecauseofhighperformanceofFrobeniusmapping,Combalgorithmdoesn’trelatetopointdoubling.
6、AndafterarrangingofCombmatrix,thequantityofpointadditionneededbythealgorithminthispaperis1/5~1/4timesofthatneededbytraditionalalgorithms.Inaddition,theefficiencyofthealgorithmisfasteratleastabout67%thanthetraditionalCombalgorithmwitharbitrarylengthofrowina
7、nycoordinate.Keywordsellipticcurvecryptosystem(ECC);scalarmultiplication;Koblitzcurve;Frobeniusmapping;Combalgorithm摘要标量乘法的效率决定着椭圆曲线密码体制的性能,而Koblitz曲线上的快速标量乘算法是标量乘法研究的重要课题,在标量k的TNAF约简基础上,给出了一种基于Frobenius映射的上层运算:Comb算法.在预计算阶段,该算法利用Frobenius映射对宽度为r的序列计算其对应椭圆
8、曲线上的点,从而建立预计算表,在累加赋值阶段结合约简后的TNAF(k)和预计算表来提高效率.Comb算法基于高效的FrobeniUS映射无须进行倍点运算,经过Comb矩阵的组合,其所需点加量是传统算法的115~1/4,"-3行数,.任意时,其效率在任意坐标下比传统Comb算法提高至少67%.关键词椭圆曲线密码体制;标量乘法;Koblitz曲线;Frobenius映射;Comb算法中图法分类号TP301.6收稿日期
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