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基于身份多接收者签密方案的安全性分析(英文).docx

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基于身份多接收者签密方案的安全性分析(英文) Introduction: Inrecentyears,withtherapiddevelopmentofmoderncommunicationtechnology,thesecurityofinformationtransmissionhasbecomeincreasinglyimportant.Inparticular,thesafetyoftransmissionandstorageofsensitivedatahasbecomeamajorconcernforbusinessesandgovernmentsaroundtheworld.Toaddressthisissue,variousencryptionschemeshavebeendevelopedtoensurethatinformationistransmittedsecurelyandcanonlybeaccessedbyauthorizedusers. Onesuchencryptionschemeistheidentity-basedmulti-receiversigncryptionscheme.Asigncryptionschemeisanencryptionschemethatcombinesdigitalsignatureandencryptionfunctionsintoasingleoperation.Thisschemeisdesignedtoallowasendertosignandencryptamessageandthensendittomultiplerecipientswhohavedifferentidentities.Inthispaper,wewilldiscussthesecurityanalysisoftheidentity-basedmulti-receiversigncryptionschemeanditsstrengthsandweaknesses. SecurityAnalysis: Thesecurityoftheidentity-basedmulti-receiversigncryptionschemeisbasedonthreemainfunctions:signcryption,keygeneration,anddecryption.Thesigncryptionfunctioncombinesthefunctionsofdigitalsignatureandencryptionintoasingleoperation.Thekeygenerationfunctiongeneratesauniquekeyforeachuserbasedontheiridentity,andthedecryptionfunctionusestheprivatekeytodecryptthemessage. Oneofthemainadvantagesofthisschemeisthatitprovidesbothconfidentialityandauthenticitywhileminimizingthecomputationaloverhead.Theschemeachievesthisbycombiningtheoperationsofsignatureandencryptionintoasingleoperation.Thisreducesthecomputationaloverheadcomparedtoperformingsignatureandencryptionseparately. Anotheradvantageoftheschemeisthatitallowsasendertosendamessagetomultiplerecipientssecurely.Thisisachievedbygeneratingauniquekeyforeachrecipientbasedontheiridentity.Thesenderthenencryptsthemessageusingthesekeys,andeachrecipientcanthendecryptthemessageusingtheiruniquekey.Thisensuresthatthemessageisonlyvisibletotheintendedrecipients. However,theidentity-basedmulti-receiversigncryptionschemeisnotwithoutitsweaknesses.Oneweaknessisthatitisvulnerable