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
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
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
NetBill security and transaction protocol
WOEC'95 Proceedings of the 1st conference on USENIX Workshop on Electronic Commerce - Volume 1
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Electronic contracting is an essential service to develop electronic commerce. But this service is not very used because merchants and consumers do not trust in contracting by electronic means. For time we already have technical solutions that should allow to give trust to the actors implied in this new scenario. But the lack of international standards and of an appropriate juridical mark, suppose a serious restraint to the contracting by electronic means. Well then, in recent years we can observe some legislative initiatives in the European Union to give full juridical effect to electronic contracting. With these two elements already in course, we believe that a last step will be necessary: to assess the adaptation of the technical solutions regarding the enacted legislation. In this paper, juridical and technical analysis of contract signing protocols is carried out. Besides, we present a modified version of a previous optimistic fair protocol for contract signing.