Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Optimistic protocols for fair exchange
Proceedings of the 4th ACM conference on Computer and communications security
Abuse-Free Optimistic Contract Signing
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Off-Line Fair Payment Protocols Using Convertible Signatures
ASIACRYPT '98 Proceedings of the International Conference on the Theory and Applications of Cryptology and Information Security: Advances in Cryptology
Simple and fast optimistic protocols for fair electronic exchange
Proceedings of the twenty-second annual symposium on Principles of distributed computing
Constructing fair-exchange protocols for E-commerce via distributed computation of RSA signatures
Proceedings of the twenty-second annual symposium on Principles of distributed computing
Breaking and repairing optimistic fair exchange from PODC 2003
Proceedings of the 3rd ACM workshop on Digital rights management
Designated verifier proofs and their applications
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
Optimistic fair exchange in a multi-user setting
PKC'07 Proceedings of the 10th international conference on Practice and theory in public-key cryptography
Multi-party stand-alone and setup-free verifiably committed signatures
PKC'07 Proceedings of the 10th international conference on Practice and theory in public-key cryptography
Aggregate and verifiably encrypted signatures from bilinear maps
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Fully anonymous group signatures without random oracles
ASIACRYPT'07 Proceedings of the Advances in Crypotology 13th international conference on Theory and application of cryptology and information security
Efficient non-interactive proof systems for bilinear groups
EUROCRYPT'08 Proceedings of the theory and applications of cryptographic techniques 27th annual international conference on Advances in cryptology
CT-RSA'08 Proceedings of the 2008 The Cryptopgraphers' Track at the RSA conference on Topics in cryptology
Online-untransferable signatures
PKC'08 Proceedings of the Practice and theory in public key cryptography, 11th international conference on Public key cryptography
Generic transformation from weakly to strongly unforgeable signatures
Journal of Computer Science and Technology
Stand-Alone and setup-free verifiably committed signatures
CT-RSA'06 Proceedings of the 2006 The Cryptographers' Track at the RSA conference on Topics in Cryptology
Ring signatures: stronger definitions, and constructions without random oracles
TCC'06 Proceedings of the Third conference on Theory of Cryptography
Chosen-Ciphertext security from tag-based encryption
TCC'06 Proceedings of the Third conference on Theory of Cryptography
Optimistic fair exchange of digital signatures
IEEE Journal on Selected Areas in Communications
Verifiably Encrypted Signatures from RSA without NIZKs
INDOCRYPT '09 Proceedings of the 10th International Conference on Cryptology in India: Progress in Cryptology
A new construction of designated confirmer signature and its application to optimistic fair exchange
Pairing'10 Proceedings of the 4th international conference on Pairing-based cryptography
One-time trapdoor one-way functions
ISC'10 Proceedings of the 13th international conference on Information security
Group-oriented fair exchange of signatures
Information Sciences: an International Journal
Fair and abuse-free contract signing protocol from Boneh-Boyen signature
EuroPKI'10 Proceedings of the 7th European conference on Public key infrastructures, services and applications
Concurrent signatures with fully negotiable binding control
ProvSec'11 Proceedings of the 5th international conference on Provable security
Further observations on optimistic fair exchange protocols in the multi-user setting
PKC'10 Proceedings of the 13th international conference on Practice and Theory in Public Key Cryptography
PKC'10 Proceedings of the 13th international conference on Practice and Theory in Public Key Cryptography
PKC'12 Proceedings of the 15th international conference on Practice and Theory in Public Key Cryptography
Perfect ambiguous optimistic fair exchange
ICICS'12 Proceedings of the 14th international conference on Information and Communications Security
Information Sciences: an International Journal
Hi-index | 0.00 |
Optimistic fair exchange (OFE) is a protocol for solving the problem of exchanging items or services in a fair manner between two parties, a signer and a verifier, with the help of an arbitrator which is called in only when a dispute happens between the two parties. In almost all the previous work on OFE, after obtaining a partial signature from the signer, the verifier can present it to others and show that the signer has indeed committed itself to something corresponding to the partial signature even prior to the completion of the transaction. In some scenarios, this capability given to the verifier may be harmful to the signer. In this paper, we propose the notion of ambiguous optimistic fair exchange (A-OFE), which is an OFE but also requires that the verifier cannot convince anybody about the authorship of a partial signature generated by the signer. We present a formal security model for A-OFE in the multi-user setting and chosen-key model. We also propose an efficient construction with security proven without relying on the random oracle assumption.