2004 | OriginalPaper | Buchkapitel
Signature Schemes and Anonymous Credentials from Bilinear Maps
verfasst von : Jan Camenisch, Anna Lysyanskaya
Erschienen in: Advances in Cryptology – CRYPTO 2004
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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We propose a new and efficient signature scheme that is provably secure in the plain model. The security of our scheme is based on a discrete-logarithm-based assumption put forth by Lysyanskaya, Rivest, Sahai, and Wolf (LRSW) who also showed that it holds for generic groups and is independent of the decisional Diffie-Hellman assumption. We prove security of our scheme under the LRSW assumption for groups with bilinear maps. We then show how our scheme can be used to construct efficient anonymous credential systems as well as group signature and identity escrow schemes. To this end, we provide efficient protocols that allow one to prove in zero-knowledge the knowledge of a signature on a committed (or encrypted) message and to obtain a signature on a committed message.