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Introduction Digitalsignatureistheelectronicversionof handwrittensignaturefordigitaldocuments.A digitalsignatureschemeallowsasignertotrans-formanarbitrarymessageintoasignedmessage,suchthatanyonecancheckthevalidityofthe signedmessageusingthesigner'spublickey,but onlythesignerisabletoproducesignedmessages.RSAdigitalsignature[1]isaverypopulardigi-talsignaturescheme,whosesecurityisbasedon theRSAassumption:“foragiveny∈Z*n,itis hardtocomputethemodulare-throotxofysuch thatxe=ymodn”.However,howt… 相似文献