Threshold Ring Signatures and Applications to Ad-hoc Groups
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
1-out-of-n Signatures from a Variety of Keys
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Universal designated verifier ring signature (proof) without random oracles
EUC'06 Proceedings of the 2006 international conference on Emerging Directions in Embedded and Ubiquitous Computing
Efficient identity based ring signature
ACNS'05 Proceedings of the Third international conference on Applied Cryptography and Network Security
A ring signature scheme using bilinear pairings
WISA'04 Proceedings of the 5th international conference on Information Security Applications
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Proxy ring signatures allows proxy signer to sign messages on behalf of the original signer while providing anonymity. In this paper, we give the first formal security definitions and notions of proxy ring signatures. Subsequently, we propose a short proxy ring signature scheme, with rigorous security proofs. It is more efficient than the existing proxy ring signature schemes. Finally, we propose a new kind of proxy ring signatures. Existing proxy ring signatures in the literature provide anonymity for proxy signer only. We extend the notion to support anonymity for original signer as well. We give an efficient and secure instantiation of it.