One of the promising multimedia services is the mobile pay-TV service. Due to its wireless nature, mobile pay-TV is vulnerable to attacks especially during hand-off. In 2011, an efficient anonymous authentication prot...One of the promising multimedia services is the mobile pay-TV service. Due to its wireless nature, mobile pay-TV is vulnerable to attacks especially during hand-off. In 2011, an efficient anonymous authentication protocol for mobile pay-TV is proposed. The authors claim that their scheme provides an anonymous authentication to users by preventing intruders from obtaining users’ IDs during the mutual authentication between mobile subscribers and head end systems. However, after analysis, it was found that the scheme does not provide anonymous authentication and users can be easily tracked while using their anonymous identity. The scheme is also subject to denial of service attack. In this paper the deficiencies of the original scheme are demonstrated, and then a proposed improved scheme that eliminates these deficiencies is presented.展开更多
In this paper,we introduce a novel way to solve thetradeoff problem about communication,storage,computation overhead of broadcast encryptionscheme.We construct a new scheme based on SubsetDifference(SD)scheme,use the ...In this paper,we introduce a novel way to solve thetradeoff problem about communication,storage,computation overhead of broadcast encryptionscheme.We construct a new scheme based on SubsetDifference(SD)scheme,use the concept of RSAaccumulator and the idea of separating the user-sidedevice into different function parts,take advantageof the public device’s functionality,minimize thestorage and computation overhead of the privatedevice,and make the broadcast encryption schememore implementation-oriented.展开更多
文摘One of the promising multimedia services is the mobile pay-TV service. Due to its wireless nature, mobile pay-TV is vulnerable to attacks especially during hand-off. In 2011, an efficient anonymous authentication protocol for mobile pay-TV is proposed. The authors claim that their scheme provides an anonymous authentication to users by preventing intruders from obtaining users’ IDs during the mutual authentication between mobile subscribers and head end systems. However, after analysis, it was found that the scheme does not provide anonymous authentication and users can be easily tracked while using their anonymous identity. The scheme is also subject to denial of service attack. In this paper the deficiencies of the original scheme are demonstrated, and then a proposed improved scheme that eliminates these deficiencies is presented.
基金support from Asia Media Research Center Foundation (AM0551)Foundation of the State Administration of Radio Film and Television (SARFT) (NO.2005-02-1 and NO.2005-02-2).
文摘In this paper,we introduce a novel way to solve thetradeoff problem about communication,storage,computation overhead of broadcast encryptionscheme.We construct a new scheme based on SubsetDifference(SD)scheme,use the concept of RSAaccumulator and the idea of separating the user-sidedevice into different function parts,take advantageof the public device’s functionality,minimize thestorage and computation overhead of the privatedevice,and make the broadcast encryption schememore implementation-oriented.
