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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2021/8/211TheoreticalFoundationsofCryptographyOutlineIntroductionRelatedw

2、orkKeydistributionalgorithmMulticastwatermarkprotocolImplementationandexperimentConclusion2021/8/212TheoreticalFoundationsofCryptographyIntroductionWepresentasimple,efficient,andsecuremulticastprotocolwithcopyrightprotectioninanopenandinsecurenetworkenvironmentThereisawid

3、erangeofmultimediaapplicationsthatcanbenefitfromusingoursecuremulticastprotocol,e.g.thecommercialpay-per-viewvideomulticast,orhighlysecuremilitaryintelligencevideoconference2021/8/213TheoreticalFoundationsofCryptographyExpectedgoalsSecurityinopennetworkenvironmentoursecur

4、emulticastprotocolmustnotdependonanyoftheintermediatenetworkcomponentsforsecuritysupportMulticastarchitectureindependenceencryptingordecryptingdataontheendpointhostsbeforesendingittoorafterreceivingitfromtheunderlyingmulticastprotocolRobustdynamicmembershipsupportthekeydi

5、stributionprotocolmustdealgracefullywithlossyorlongdelayunreliablemulticastchannels2021/8/214TheoreticalFoundationsofCryptography(cont’d)Real-timeencryptiontheencryptionalgorithmshouldaimtowardsefficientandreal-timeprocessingsothattheycanbecomeanintegralpartofthedeliveryp

6、rocessandatthesametimepreservethehighestsecuritylevelandcompressionratioCopyrightprotectionweapplythewatermarktechniquetoencodetheownershipinformationintothevideodataLeakersidentificationitenablesthecontentprovidersandthegroupleadertoidentifytheleaker(s)aftertheleakeddata

7、isdiscoveredandanalyzed2021/8/215TheoreticalFoundationsofCryptographyContributionsWemadethefirstattempttointegratetheproblemofmulticastkeydistribution,real-timevideoencryption,copyrightprotection,leakersidentificationinourworkWemodifythesecuremulticastprotocolbyusingsymme

8、trickeycryptosysteminsteadofasymmetrickeycryptosystemWeapplyandenhancethecollusion-securealgorit