持续性肾脏替代治疗crrt英文精品课件- crrt

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1、PollingWithPhysicalEnvelopesARigorousAnalysisofaHuman–CentricProtocolTalMoranJointworkwithMoniNaorCryptographicRandomizedResponse“RandomizedResponseTechnique”[War65]MethodforpollingstigmatizingquestionsIdea:Liewithknownprobability.SpecificanswersaredeniableAggregateresultsarestill

2、validProblem:respondersmayhaveincentivetocheatE.g.,Pre-electionpollsCRRT[AJL04]:UsecryptographictechniquestopreventcheatingUsesZK,OTorquantumcryptographyRequireseithercomputersorquantumequipmentCRRTandAnthropoCryptographyResponder’strustiscriticalwhenpollingsensitivequestionsWecan’

3、tassumerespondershaveknowledgeofcomputersorcryptographyOurprotocolsmusttakeintoaccounthumanabilitiesandlimitations:PreviousWorkVisualCryptography[NS94]PrivatecomputationusingaPezdispenser[BCIK03]“AppliedKidCryptography”[NNR]BasingCryptographicProtocolsonTamper-EvidentSeals[MN05]Ou

4、rResultsProtocolsforCRRTusingscratch-offcardsandenvelopesSimpleenoughtobepracticalOurprotocolsaresecureinCanetti’sUCmodelAllowssecureblack-boxcompositionLowerboundsonImplementationsof“Strong”CRRT.Scratch-OffCardsandEnvelopesContaina“sealed”messageCan’treadthemessagewithoutbreakingt

5、hesealItisevidentwhenthesealisbrokenNextTime!p-CRRT:WhatwewouldlikeAssumetheanswertothepolliseither0or1,pisfixed:½

6、hepollstergetsnoadditionalinformationaboutthestrategychosenbeyondtheresultitself.p-CRRT:WhatwecangetAssumetheanswertothepolliseither0or1,pisfixed:½

7、eoutputbeyondchoosingthestrategy;Pollstercanlearnthestrategy,butrisksgettingcaught.“Responder-Immune”Thepollstergetsnoadditionalinformationaboutthestrategychosenbeyondtheresultitself;Respondercaninfluenceoutput,butrisksgettingcaught“Pollster-Immune”Pollster-Immune¾-CRRT(withScratc

8、h-OffCards)Alicepreparesac