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1、外文翻译系别信息工程系专业网络工程班级B841111学号B84111117姓名任贺指导教师孟桂英负责教师沈阳航空航天大学北方科技学院2012年6月沈阳航空航天大学北方科技学院毕业设计(外文翻译)TheDesignandRealizationofDigitalSignatureBasedonRSARSAalgorithmsisintroducedRSApublickeycryptography.So-calledpublickeycryptographysystemistousedifferentencryptionanddecryptionkeykeys,isa"knownencrypt
2、ionkeyisdeducedbydeclassifiedincalculationsiskeytobedone"passwordsystem.Inapublic-keycryptosystem,encryptionkey(i.e.publickey)PKisthepublicinformation,anddecryptionkey(namely,theprivatekey)SKisneededtoremainconfidential.EncryptionalgorithmEanddecryptionalgorithmDalsoareintheopen.Althoughthesecret
3、keySKisbypublickeyPKdecision,butcannotPKcalculatedaccordingtoSK.Itisbasedonthistheory,appearedin1978thefamousRSAalgorithms,itisusuallyintoapairofMrRSAkeys,oneofwhichiskeptsecretkey,savebyusers;Anotherforpublickey,canbemadepublic,andevencanberegisteredinthenetworkserver.Inordertoimprovethesecrecyi
4、ntensity,RSAkeysatleast500bitslong,generallyrecommendusing1024bits.Thismakesthecalculationamountofencryptionisverylarge.Toreducethecomputationalcomplexity,sendingtheinformation,oftenUSEStraditionalencryptionmethodsandpublickeyencryptionmethodunifiesmeans,thatinformationwiththeimprovedDESorIDEAdia
5、loguekeyencryption,andusetheRSAencryptionkeysandinformationthedialogue.Eachotherafterreceivinginformation,withdifferentkeysdecryptionandcanchecktheinformation.RSAalgorithmsisthefirstnotonlycanbeusedforencryptionbutalsocanbeusedfordigitalsignaturealgorithm,anditisalsoeasytounderstandandoperation.R
6、SAismostwidelystudiedpublickeyalgorithm,andputforwardtothenowfrommorethan30years,experiencedthetestofallkindsofattacks,forthepeopletoacceptgradually,generally,isnowoneofthemostoutstandingpublickeysolutions.ThesafetyoftheRSARSAsecuritydependsonthelargerdecomposition,butwhetherornotequaltotarsusdec
7、ompositiontheoryhasbeenfailedtogetthecertificate,andfornoproofthatbreakRSAwillneedtobelargerdecomposition.Assumingtherearealargewithoutdecompositionalgorithm,itmustbelargerdecompositionalgorithmcanbemodified.Atpresent,
