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
Non-repudiation with mandatory proof of receipt
ACM SIGCOMM Computer Communication Review
Security in computing
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
Handbook of Applied Cryptography
Handbook of Applied Cryptography
ESORICS '96 Proceedings of the 4th European Symposium on Research in Computer Security: Computer Security
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
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
NetBill security and transaction protocol
WOEC'95 Proceedings of the 1st conference on USENIX Workshop on Electronic Commerce - Volume 1
Efficient Optimistic N-Party Contract Signing Protocol
ISC '01 Proceedings of the 4th International Conference on Information Security
A Realistic Protocol for Multi-party Certified Electronic Mail
ISC '02 Proceedings of the 5th International Conference on Information Security
An Attack on a Protocol for Certified Delivery
ISC '02 Proceedings of the 5th International Conference on Information Security
On the security of a certified e-mail scheme with temporal authentication
ICCSA'05 Proceedings of the 2005 international conference on Computational Science and Its Applications - Volume Part III
On the security of a certified e-mail scheme
INDOCRYPT'04 Proceedings of the 5th international conference on Cryptology in India
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Certified electronic mail is a kind of fair exchange of values: a message for a receipt. An exchange is fair if at the end of the exchange, either each party receives the item it expects or neither party receives any useful information about the other's item. Fairness can be achieved through the involvement of a trusted third party (TTP). It is very interesting (and practical) the optimistic approach of involving a third party only in the case of exceptions: one party cannot obtain the expected item from the other party. Previous solutions using this approach implicitly assumed that players had reliable communication channels to the third party [2]. In this paper, we present an efficient (only three steps, the minimum), optimistic and fair protocol for certified electronic mail.