《资管所硕二》课件.ppt

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1、AsecuremulticastprotocolwithcopyrightprotectionHao-huaChu,LintianQiao,KlaraNahrstedtACMSIGCOMMComputerCommunicationsReviewVolume32,Number2:April2002資管所碩二R90725020郭至鈞資管所碩二R90725038黃克行資管所碩一R91725007施翔騰2021/8/181TheoreticalFoundationsofCryptographyOutlineIntroductionRelatedwo

2、rkKeydistributionalgorithmMulticastwatermarkprotocolImplementationandexperimentConclusion2021/8/182TheoreticalFoundationsofCryptographyIntroductionWepresentasimple,efficient,andsecuremulticastprotocolwithcopyrightprotectioninanopenandinsecurenetworkenvironmentThereisawider

3、angeofmultimediaapplicationsthatcanbenefitfromusingoursecuremulticastprotocol,e.g.thecommercialpay-per-viewvideomulticast,orhighlysecuremilitaryintelligencevideoconference2021/8/183TheoreticalFoundationsofCryptographyExpectedgoalsSecurityinopennetworkenvironmentoursecuremu

4、lticastprotocolmustnotdependonanyoftheintermediatenetworkcomponentsforsecuritysupportMulticastarchitectureindependenceencryptingordecryptingdataontheendpointhostsbeforesendingittoorafterreceivingitfromtheunderlyingmulticastprotocolRobustdynamicmembershipsupportthekeydistri

5、butionprotocolmustdealgracefullywithlossyorlongdelayunreliablemulticastchannels2021/8/184TheoreticalFoundationsofCryptography(cont’d)Real-timeencryptiontheencryptionalgorithmshouldaimtowardsefficientandreal-timeprocessingsothattheycanbecomeanintegralpartofthedeliveryproces

6、sandatthesametimepreservethehighestsecuritylevelandcompressionratioCopyrightprotectionweapplythewatermarktechniquetoencodetheownershipinformationintothevideodataLeakersidentificationitenablesthecontentprovidersandthegroupleadertoidentifytheleaker(s)aftertheleakeddataisdisc

7、overedandanalyzed2021/8/185TheoreticalFoundationsofCryptographyContributionsWemadethefirstattempttointegratetheproblemofmulticastkeydistribution,real-timevideoencryption,copyrightprotection,leakersidentificationinourworkWemodifythesecuremulticastprotocolbyusingsymmetrickey

8、cryptosysteminsteadofasymmetrickeycryptosystemWeapplyandenhancethecollusion-securealgorit