廣播加密方案研究.pdf

1、西安理工大學碩士學位論文廣播加密方案研究姓名：解康樂申請學位級別：碩士專業(yè)：應用數(shù)學指導教師：王尚平20080301AbStractTitle：RESARRCHONBROADCASTENCRYTIONSCHEMESMajor=AppliedMathematicsName=KangleXieSupervisor=ProfShangpingWangAbstractSignature：魚竺生竺sjgnature：叢镩脅Withthedevel

2、opmentoftechnologyandsocietymodemtechnologyofcommunicationalsogainedtherapiddevelopmentUsualcomputercommunicationisbasedonpointtopointopcratemodewhichdiffersfrombroadcastencryptionthatiSbasedononepointtomultiplepointsope

3、ratemodeSotheefficiencyofbroadcastencryptionwhichiSanimportanttoolsinthefiledofinformation，iSmorehighthanusualcommunicationmethod，whichisamainpointfortherecentlyresearchformodemencryptiontheoryonbroadcastencryptionInl993

4、Fiatfirstlyadvancedthecone印tofbroadcastencryptionandshowedthetheoryaboutitAfterwardsmanyscholarsstudyonthisfiledandmanygoodmethodsforbroadcastencryptionareproposedAndtherearealsosomespecialbroadcastencryptionmethodsBroad

5、castencryptioniSanewsearchfieldintheencryptionanddecryptionfieldBroadcastencryptioncouldbeusedintheapplicationofmanyfiledssuchasdigitalcopyright，chargedtelevision，CD，DVD，mediaprotection，fileprotection，secureemail，etcHowe

6、vermanybroadcastencryptionmethodseitherhavepotentialsecurityhazardorhavelOWemciencyIIlthisPapertheauthorspendsometimeonthesearchofsecure，e伍cientbroadcastencryptionschemesandgainedsomeusefulprogressThefollowingarethemainr

7、esearch：1ResearchonbroadcastencryptionschemesbasedonpolynomialinterpolationThroughthecompareofShamir’SschemeandHuang’SHLCscheme，wepointedthedifferenceofthemandtheadvantageanddisadvantange2Basedonthepropertyofpolynomialin

8、terpolationandChineseremaindertheoremweconstructanewbroadcastencryptionschemewhichhassmalllengthofciphertextandsmallspaceforUSerS3westudiedtheVJPCschemeandfoundabigproblemSoweproposedanewbroadcastencryptionschemeandmodif

9、ythisproblemTheschemehassmallciphertextlengthandissecureundertheDBDHassumptionKeywords：Broadcastencryption；Securebroadcast；Thresholdbroadcast；DigitalcopyrightSupportedby：NationalNaturalScienceFoundation，China(No60273089)