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Publié par | pefav |
Nombre de lectures | 27 |
Langue | English |
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Structure-PreservingSignaturesand,rancekCommitmentsCommittoComputerGroupInstituteElementsralambievMasa/yukiCollegeAbNewe,1andGeouchsbauerrgubFntuchsbauerINRIA,2UniversitJensUKGrothDepa3oKristiyiversitan5HaInforalambievT4AbMiyhakooSignOhkubGroupoCRYPTO'105-CRYPTO,F16.08.201031yInfoLondon,r4mScienceationrtment,ShaYringrPlatfoUnrmyLabUSAoNationalratoofries,rmationNTTCommunicationsCoechnologyrJapanpe,Fo,Grotration,,HaJapa,Ohkubn()2o:?coleandNotormaleElemeSups?rieure,1CNRS23OurContributionsNewcomoeysROMmitmentdoandFirstsignatureAbschemesGroupinwithbilineablindrwithgroupspHomomohrphicSigntrapCRYPTO'10dororrecientcommitments(UCtogroupgjoinrecientoxyupuchsbauerelemenralambievtsubSignaturesCommitonntgroup/elements,oconsistingcommitmentsofsublineagroupkelementsFirst(round-optimalstructure-psignaturesreservingsecure))ecientStructure-psignaturesreservingconcurrentsignaturesw/osigningFirsttheiranonymousorownsignaturespublice,Fk,Groteys,Ha(,Ohkubautomo()rphico:)andSimulatabletosignaturesElemeApplicationssConstant-size2trap23OurContributionsNewcomoeysROMmitmentdoandFirstsignatureAbschemesGroupinwithbilineablindrwithgroupspHomomohrphicSigntrapCRYPTO'10dororrecientcommitments(UCtogroupgjoinrecientoxyupuchsbauerelemenralambievtsubSignaturesCommitonntgroup/elements,oconsistingcommitmentsofsublineagroupkelementsFirst(round-optimalstructure-psignaturesreservingsecure))ecientStructure-psignaturesreservingconcurrentsignaturesw/osigningFirsttheiranonymousorownsignaturespublice,Fk,Groteys,Ha(,Ohkubautomo()rphico:)andSimulatabletosignaturesElemeApplicationssConstant-size2trap23OutlineofthetalkAboGroup1hCommitmentsSign2CRYPTO'10AutomouchsbauerrphicralambievSignaturesub3CommitSignatureston/Ve,Fecto,Grotrs,Haof,OhkubGroup()Eo:lementsand4toApplicationsElemenofsOur3Signatures231Commitments2AutomohSignCRYPTO'10rphicoSignaturesGroup3uchsbauerSignaturesralambievonubVCommitectotrs/of,GrotGroup,HaE,Ohkublements()4o:ApplicationsandoftoOurElemenSignaturessAb4e,F23CommitmentsAcommitmentisAbenedschemerconsistsGroupofpsetupofarenodcanalgohomomorithmtComtheComatakmessageesaahmessageSignandCRYPTO'10randomnesseandanyoutputsphic:aductcoocommitmentmmirotmentmessagesMessageisandthanrandomnessmessagesasrercalleduchsbaueropralambieveningub.CommitOurntscheme/isbhiding:opatocommitmentmessagerevealsrnothingtheabrooutofthewmessagecommitmentsbinding:ahatordptoductndthealength-reducing:commitmentcommitmentandshotterwtheoTheopaeningselementwithofdierentbilineamessagesgrouptrape,Fdo,Groto,Har:,Ohkubgiven()ao:trapanddotooElemer,sa5commitment23CommitmentsAcommitmentisAbenedschemerconsistsGroupofpsetupofarenodcanalgohomomorithmtComtheComatakmessageesaahmessageSignandCRYPTO'10randomnesseandanyoutputsphic:aductcoocommitmentmmirotmentmessagesMessageisandthanrandomnessmessagesasrercalleduchsbaueropralambieveningub.CommitOurntscheme/isbhiding:opatocommitmentmessagerevealsrnothingtheabrooutofthewmessagecommitmentsbinding:ahatordptoductndthealength-reducing:commitmentcommitmentandshotterwtheoTheopaeningselementwithofdierentbilineamessagesgrouptrape,Fdo,Groto,Har:,Ohkubgiven()ao:trapanddotooElemer,sa5commitment23CommitmentsAcommitmentisAbenedschemerconsistsGroupofpsetupofarenodcanalgohomomorithmtComtheComatakmessageesaahmessageSignandCRYPTO'10randomnesseandanyoutputsphic:aductcoocommitmentmmirotmentmessagesMessageisandthanrandomnessmessagesasrercalleduchsbaueropralambieveningub.CommitOurntscheme/isbhiding:opatocommitmentmessagerevealsrnothingtheabrooutofthewmessagecommitmentsbinding:ahatordptoductndthealength-reducing:commitmentcommitmentandshotterwtheoTheopaeningselementwithofdierentbilineamessagesgrouptrape,Fdo,Groto,Har:,Ohkubgiven()ao:trapanddotooElemer,sa5commitment23; 2G ; 2G
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