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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Group Signatures with Separate and Distributed Authorities
verfasst von : Jun Furukawa, Shoko Yonezawa
Erschienen in: Security in Communication Networks
Verlag: Springer Berlin Heidelberg
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We propose a new group signature scheme that simultaneously provides the following two properties : (1) the membership authority is able to add a user but not to identify an actual signer, while the tracing authority is able to identify the actual signer but not to add a user, (2) for further decentralization, these two authorities are respectively distributed among multiple entities in a manner efficient enough for practical applications. Previous group signature schemes have only offered one or the other of these two properties. Further, we formalize the security properties.