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http://dx.doi.org/10.13089/JKIISC.2004.14.3.49

An Anonymous asymmetric public key traitor tracing scheme  

최은영 (고려대학교)
이동훈 (고려대학)
홍도원 (한국전자통신연구원)
Abstract
In broadcast encryption schemes, traceability is a useful property to trace authorized subscribers, called traitors, who collude for manufacturing a pirate decoder. Unfortunately, this is usually achieved with a sacrifice of a privacy. Most traitor tracing schemes in the literature have been developed without considering a subscriber's anonymity, which is one of important requirements for electronic marketplaces to offer similar privacy as current marketplace. It would be unsatisfactory for the subscriber to reveal his/her identity to purchase multimedia contents. In this paper we propose an anonymous broadcast encryption scheme, where a user can subscribe anonymously and one purchases multimedia contents without giving a lot of information about his lifestyle, habits, and etc, but anonymity control is provided, i.e., a data supplier can date traitors.
Keywords
Public key traitor tracing; Anonymous; Asymmetric;
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