The development of an efficient and secure product entitlement system forPay-TV in modern attack scenarios

[摘要] ENGLISH ABSTRACT: A secure product entitlement system allows one party, such as a pay-TV operator, tobroadcast the same collection of information to several receiving parties while only allowinga certain subset of the receiving parties to access the information. This system muststill be secure in the scenario where all receiving parties who are not allowed access to theinformation, pool their resources in an attempt to gain access to the information. Such aproduct entitlement system must also be bandwidth e cient since it can be deployed innetworks where bandwidth is at a premium.The foundations of modern encryption techniques is reviewed and a survey of existingtechniques, used to secure content in broadcast environments, is studied. From thiscollection of techniques two were identi ed as bandwidth e cient and are discussed inmore detail before being implemented.An attempt is then made to design a new secure bandwidth e cient encryption schemefor protecting content in a broadcast environment. Several iterations of the design is detailed,including the securityaw which makes each design insecure. Thenal design wasimplemented and compared in several metrics to the two previously selected bandwidthe cient schemes. A framework to test the correctness of the schemes over a network isalso designed and implemented.Possible future avenues of research are identi ed with regards to creating a securebroadcast encryption scheme and improving the software solution in which to use such ascheme.

[发布机构] Stellenbosch University