Authentic Attributes with Fine-Grained Anonymity Protection

摘要: Collecting accurate profile information and protecting an individual's privacy are ordinarily viewed as being at odds. This paper presents mechanisms that protect individual while presenting accurate--indeed authenticated--profile to servers merchants. In particular, we give a pseudonym registration scheme system enforces unique user separating trust required of registrars, issuers, validators. enables the issuance global pseudonyms (GUPs) attributes enabling practical applications such authentication enforcement "one-to-a-customer" properties.We also present resilient even pseudonymous profiling yet preserving ability merchants authenticate accuracy information. It is first mechanism which authors aware guarantee recent validity for group signatures, more generally multigroup thus effectively revocation all or some multi-group certificates held by principal.