Authentic Attributes with Fine-Grained Anonymity Protection
NAVAL RESEARCH LAB WASHINGTON DC CENTER FOR HIGH ASSURANCE COMPUTING SYSTEMS (CHACS)
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Collecting accurate profile information and protecting an individuals privacy are ordinarily viewed as being at odds. This paper presents mechanisms that protect individual privacy while presenting accurateindeed authenticated-profile information to servers and merchants. In particular, we give a pseudonym registration scheme and system that enforces unique user registration while separating trust required of registrars, issuers, and validators. This scheme enables the issuance of global unique pseudonyms GUPs and attributes enabling practical applications such as authentication of accurate attributes and enforcement of one-to-a- customer properties. We also present a scheme resilient to even pseudonymous profiling yet preserving the ability of merchants to authenticate the accuracy of information. It is the first mechanism of which the authors are aware to guarantee recent validity for group signatures, and more generally multi- group signatures, thus effectively enabling revocation of all or some of the multi-group certificates held by a principal.
- Computer Systems Management and Standards