Practical and provably secure release of a secret and exchange of signatures
EUROCRYPT '93 Workshop on the theory and application of cryptographic techniques on Advances in cryptology
Fair exchange with a semi-trusted third party (extended abstract)
Proceedings of the 4th ACM conference on Computer and communications security
Optimistic protocols for fair exchange
Proceedings of the 4th ACM conference on Computer and communications security
A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
A Multi-party Optimistic Non-repudiation Protocol
ICISC '00 Proceedings of the Third International Conference on Information Security and Cryptology
Predicting the Performance of Transactional Electronic Commerce Protocols
Proceedings of the IFIP TC11 WG11.1/WG11.2 Seventh Annual Working Conference on Information Security Management & Small Systems Security
Exploring Fair Exchange Protocols Using Specification Animation
ISW '00 Proceedings of the Third International Workshop on Information Security
An Efficient Protocol for Certified Electronic Mail
ISW '00 Proceedings of the Third International Workshop on Information Security
Efficient Optimistic N-Party Contract Signing Protocol
ISC '01 Proceedings of the 4th International Conference on Information Security
Some Remarks on a Fair Exchange Protocol
PKC '00 Proceedings of the Third International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
An Efficient Non-repudiation Protocol
CSFW '97 Proceedings of the 10th IEEE workshop on Computer Security Foundations
A fair non-repudiation protocol
SP '96 Proceedings of the 1996 IEEE Symposium on Security and Privacy
ASIACCS '06 Proceedings of the 2006 ACM Symposium on Information, computer and communications security
Multiparty nonrepudiation: A survey
ACM Computing Surveys (CSUR)
On the quest for impartiality: design and analysis of a fair non-repudiation protocol
ICICS'05 Proceedings of the 7th international conference on Information and Communications Security
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In some cases, users need to notify the same information to multiple recipients, with the requirement that these recipients have to send an acknowledgement of receipt. In this paper we present an optimistic protocol for multi-party certified electronic mail. A Trusted Third Party (TTP) can take part in a protocol run, but only in case of exception. Fairness is guaranteed for all parties being involved in a transaction. At the end of a protocol run, every party possesses enough evidence to prove the final state of the exchange. Parties can contact the TTP when they want (without temporal constraints). The presented protocol is the best one in terms of efficiency: only three steps have to be followed in the exchange sub-protocol.