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1、SECURITYANDCOMMUNICATIONNETWORKSSecurityComm.Networks(2010)PublishedonlineinWileyInterScience(www.interscience.wiley.com).DOI:10.1002/sec.176SPECIALISSUEPAPEREnhancedcorrelationpoweranalysisattackagainsttrustedsystemsHuiyunLi∗,KekeWuandFengqiYuDepart
2、mentofIntegratedElectronics,ShenzhenInstituteofAdvancedTechnology,TheChineseUniversityofHongKong,ChineseAcademyofSciences,ChinaABSTRACTPoweranalysisattacksposeaseriousthreattothesecurityofmanytrustedsystems.Theprincipleofpoweranalysisattacksisbasedon
3、theassumptionthatthepowerconsumptionofanelectronicdeviceisproportionaltotheHammingweight(HW)ofthedatabeingprocessed.However,thispowermodelisdefectiveasitisdeviatedfromtheCMOScircuitpowerconsumptiontheorywherepowerconsumptionislargelydependentontheswi
4、tchingability,i.e.,theHammingdistance(HD)ofthedatabeingprocessed.ThispaperpresentsanHDpoweranalysismodelwhichemulatesHammingdistancebasedonprobabilitydistributionofHW,thusconjointlyachievingbetterfeasibilityandaccuracy.TheexperimentofCPAanalysisonsma
5、rtcardchipsrunningDES(DataEncryptionStandard)andAES(AdvancedEncryptionStandard)encryptiondemonstratesthattheproposedmodelcanachieve10%∼18%betterresultscomparedtotheexistingHWmodel,whichsuggestshighersuccessrateofdiscerningthesecretkeyfromthetrustedsy
6、stems.Copyright©2010JohnWiley&Sons,Ltd.KEYWORDSside-channelattacks;powermodel;probabilitydistribution*CorrespondenceHuiyunLi,DepartmentofIntegratedElectronics,ShenzhenInstituteofAdvancedTechnology,TheChineseUniversityofHongKong,ChineseAcademyofScienc
7、es,China.E-mail:hy.li@siat.ac.cn1.INTRODUCTIONhypotheticsecretkeyisfalse,thedifferentialtraceisclosetozero.Ifthehypotheticsecretkeyistrue,thedifferentialAsystemistrustedifitprovidesapredictableandreliabletraceexhibitspeaks,indicatingthepointswherethe
8、keybehaviorbymeansofasecureimplementation.Trustedbitsweremanipulated.systemssuchastrustedplatformmodules(TPM)areDPAwaslaterextendedtocorrelationpoweranalysiswidelydeployedinencryption-enabledapplicationssuch(CPA),analyzingcorrelationcoefficientbetween
