支持DRM的數(shù)字產(chǎn)品發(fā)行相關技術的研究與實踐.pdf

1、Y“／71302學校代碼：10246學號：0220211J0後旦大學碩士學位論文支持DRM的數(shù)字產(chǎn)品發(fā)行相關技術的研究與實踐院專系：信息科學與工程學院業(yè)：通信與信息系統(tǒng)姓名：程巍指導老師：高傳善教授完成日期：2005年4月26日AbstractThenetworktechnologyisdevelopingrapidlywiththepopularizationofBroadbandnetwork，allkindsofculturepr

2、oductsaredistributedasdigitalcontentontheintemetBecausedigitalcontentc矗nbeeasilycopied，distributed，andstored，bydistributingcultureproductsasdigitalcontentdistributorscansavealotofcostofproducingtransporting，andstoringHow

3、everprivatescanalsousethischaracteristicandtherebyitwouldviolatetheinterestsoftheauthorsorownersandpubliccompaniesTherefore。fthereisnotsufficientsafeguarantee，thepublishers’confidenceofnetdistributionwillbeaffected，andth

4、efurtherdevelopmentofthedistributionofdigitalcontentwillalsobeblocked。Theadvanceofdigitalrightsmanagement(DRM)providessolutionforthehealthyandfastdevelopmentofdigitalproductsDRMisacompletesetofsystemofdefining，implementi

5、ngandmanagingthedistributionanduseofdigitalproducts。Itcanalsoofferalotofpossibleblueprints，whichenablestheownersanddistributorstocontrolclientswhen嘲茍7a∞usingthedigitalproducts，suchaslimitingthecopiesofproducts，theperioda

6、ndtimesoftheUSeofproducts，ereCryptologyplaysanimportantroleIntheDRMItnotonlyappliesintheencryptinganddecrymingthedigitatcontent，butisalsoused_【othemaofautheraicationandcodeprotection，etcThisarticlefirstlyintroducesthebas

7、icknowledgeofcryptologyinvolvedInthefollowingchaptetthearticleemphasizesondiscussinghowtochooseSymmetricCryptographicAlgorithminencryptingdigitalcontentsTheauthorhasdoneanexperimenttocomparesomepopularsymmetriccryptograp

8、htcalgorithmsBymeasuringtheCPUclockcyclewithaclasspackagingtheRDTSCinstructionwhichiscreatedbytheauthorhimselKtheauthorhasmeasuredandcomparedthemosttrunnionusedsymmetriccryptographicalgorithmandtheencryptingmode，Becausee

9、ncryptionkeymustbeincludedinthelicenseinDRMsupportedsystems，relyingonlyontheeryptologycannotensurethesecurityofproductsSotheclientsoRwarcandlicensemustbeprotectedtooThIsarticleintroducesthetechnologiesabOUtcopyprotection

10、oflicenseandcodeprotection。Codeuniquenessisoneofthetechnologyofcodeprotection，whichhasmanymeritsbuthardtoimplementHence，theauthorputsforwardtheschemenamedpartialcodeuniquenessthatismucheasiertoimplement，whichisbasedonthe

11、methodofembeddingthekeyconversionalgorithmintothelicenseBasedontheanalysisofthecorrelativetechnologyofDRMsupportingdigitalproducts，theanthorbringsforwardaschemeinwhichproductscanbesold強agents，Inthisscheme，thepublishernee

12、dsnottocreateownelectronicbusinessplatformorownsalesnetworkandCallrelyonthenetworkcompanieswhoalreadyhasreliableebusinessplatformandlargesalesnetworkThelicensecentercancollectthecreditablesalesdatawhengeneratingthelicens

13、eSothetoughproblem壕at幻ensuretherealsalesdataissolvedlnthisscheme，lnthelastofthisthesistheauthorgivedaconclusionandpointedoutwhattodointhenextstudyandpracticeKeyWords：DRMDistributionofdigitalcontanm。networksecurityTP39308