How to prove yourself: practical solutions to identification and signature problems
Proceedings on Advances in cryptology---CRYPTO '86
Demonstrating possession of a discrete logarithm without revealing it
Proceedings on Advances in cryptology---CRYPTO '86
Divertible zero knowledge interactive proofs and commutative random self-reducibility
EUROCRYPT '89 Proceedings of the workshop on the theory and application of cryptographic techniques on Advances in cryptology
On blind signatures and perfect crimes
Computers and Security
Digital Payment Systems with Passive Anonymity-Revoking Trustees
ESORICS '96 Proceedings of the 4th European Symposium on Research in Computer Security: Computer Security
CRYPTO '89 Proceedings of the 9th Annual International Cryptology Conference on Advances in Cryptology
Provably Secure and Practical Identification Schemes and Corresponding Signature Schemes
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
Wallet Databases with Observers
CRYPTO '92 Proceedings of the 12th Annual International Cryptology Conference on Advances in Cryptology
"Indirect Discourse Proof": Achieving Efficient Fair Off-Line E-cash
ASIACRYPT '96 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Anonymity Control in E-Cash Systems
FC '97 Proceedings of the First International Conference on Financial Cryptography
An Efficient Off-line Electronic Cash System Based On The Representation Problem.
An Efficient Off-line Electronic Cash System Based On The Representation Problem.
Binding ElGamal: a fraud-detectable alternative to key-escrow proposals
EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
Distributed "magic ink" signatures
EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
Securing traceability of ciphertexts: towards a secure software key escrow system
EUROCRYPT'95 Proceedings of the 14th annual international conference on Theory and application of cryptographic techniques
EUROCRYPT'95 Proceedings of the 14th annual international conference on Theory and application of cryptographic techniques
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The magic ink signature recently proposed in [11] is a blind signature which allows "unblinding" of a signature by authorities to establish what is known as audit trail and anonymity revocation in case of criminal activities. In [11] as well as in all the previous fair blind signature schemes (e. g., [2] and [10]), trustees need to search a database maintained by signers to obtain a transcript of the corresponding signing protocol instance in order to trace the signature receiver. In other words, to establish anonymity revocation, the trustees need to know some information which was produced in the signing stage and kept by the signers. This is clearly not convenient for the anonymity revocation in certain applications. In this paper, we propose a new type of magic ink signature scheme. The novel feature of the new scheme is that anonymity revocation is made transcript irrelevant. That is, the trustee can revoke a receiver's anonymity based solely on the information embedded in a signature, not on any additional information; therefore, it is possible that the trustee revoke the anonymity without the help from the signer, therefore, without the signer knowing who is being traced.