Proxy signatures for delegating signing operation
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
Optimistic protocols for fair exchange
Proceedings of the 4th ACM conference on Computer and communications security
Communications of the ACM
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
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CRYPTO '91 Proceedings of the 11th Annual International Cryptology Conference on Advances in Cryptology
Short Signatures from the Weil Pairing
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
The Gap-Problems: A New Class of Problems for the Security of Cryptographic Schemes
PKC '01 Proceedings of the 4th International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
An Identity-Based Signature from Gap Diffie-Hellman Groups
PKC '03 Proceedings of the 6th International Workshop on Theory and Practice in Public Key Cryptography: Public Key Cryptography
A One Round Protocol for Tripartite Diffie-Hellman
ANTS-IV Proceedings of the 4th International Symposium on Algorithmic Number Theory
Threshold Proxy Signature Schemes
ISW '97 Proceedings of the First International Workshop on Information Security
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EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
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EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
Efficient ID-based blind signature and proxy signature from bilinear pairings
ACISP'03 Proceedings of the 8th Australasian conference on Information security and privacy
Optimistic fair exchange of digital signatures
IEEE Journal on Selected Areas in Communications
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This paper describes a proxy signature scheme where a signer can delegate a partial signing right to a party who can then sign on behalf of the original signer to generate a partial proxy signature. A partial proxy signature can be converted into a full signature with the aid of the original signer. Our proxy signature scheme has the feature of deniability, i.e., only the designated receiver can verify the partial proxy signature and the full signature associated to him, while they are not transferable. This paper also describes an application of our scheme in a deniable optimistic fair exchange.