群簽名方案的設(shè)計(jì)與分析.pdf

1、中南大學(xué)碩士學(xué)位論文群簽名方案的設(shè)計(jì)與分析姓名：周玉申請學(xué)位級別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：施榮華20070528碩學(xué)位論文ABSTRACTWiththefastdevelopmentofInteract，digitalsignatureshaveplayedanimportantroleintheaspectsofinformationsecurityidentityauthenticationdataintegritynon

2、repudiationanonymityandSOonGroupsignaturesareasortofspecialdigitalsignatures，thesalientfeaturesofgroupsignaturesmakethemmoreapplicableintheactivitiesofelectronicpoliticsandelectroniccommercesuchaselectronicvoting，electro

3、nicbidding，anduntraceableelectroniccashandSOonItisveryimportanttoanalyzeandimprovetheschemesproposed，anddesignsecure，efficientandflexiblegroupsignatureschemesSomefamousgroupsignatureschemesandsomeonesnewlyproposedareanal

4、yzedandimprovedinthedissertationAndadynamicsubgroupsignatureschemewithforwardsecurityarealsoproposedThemaincontributionsareillsfollows：l，ThesecurityofsomeimprovedschemesofCS97andthesecondschemeofCS97areanalyzedandcoaliti

5、onattackisimplementedonthoseschemes，thenallimprovedschemewhichiscoalitonresistantisproposed2，Thesecurityofthreegroupsignatureschemesofthesameclassisanalyzedandcoalitionattackonthoseschemesisimplemented，thenallimprovedsch

6、emewhichiscoalitonresistantisproposed3，Thesecurityofaclassicgroupsignatureschemeisanalyzedandcoalitionattackontheschemeisimplemented，thenanimprovedschemewhichiscoalitonresistantisproposed4，Thesecurityofanewlyproposedgrou

7、psignatureschemeisanalyzedandcoalitionattackontheschemeisimplemented，thescheme’Srevocationprotocolisalsoprovednotsecure，groupuserscouldcheatwhentheysign，SOthattheirsignaturewouldalsobevalidwhentheyarerevocatedTheschemeis

8、alsoprovednotsatisfyingtheunlinkability5，Asubgroupsignaturescheme謝thforwardsecurityisproposedTheforwardsecuritycompositionalintegrityunlinkabilityofsub—groupsignatureandsomeothersafetypropertiesareachievedatthesametimeTh