A randomized protocol for signing contracts
Communications of the ACM
How to simultaneously exchange secrets by general assumptions
CCS '94 Proceedings of the 2nd ACM Conference on Computer and communications security
Efficient verifiable encryption (and fair exchange) of digital signatures
CCS '99 Proceedings of the 6th ACM conference on Computer and communications security
Universally Composable Notions of Key Exchange and Secure Channels
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
PKC '03 Proceedings of the 6th International Workshop on Theory and Practice in Public Key Cryptography: Public Key Cryptography
An Efficient Non-repudiation Protocol
CSFW '97 Proceedings of the 10th IEEE workshop on Computer Security Foundations
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
Universally Composable Security: A New Paradigm for Cryptographic Protocols
FOCS '01 Proceedings of the 42nd IEEE symposium on Foundations of Computer Science
A fair non-repudiation protocol
SP '96 Proceedings of the 1996 IEEE Symposium on Security and Privacy
Breaking and repairing optimistic fair exchange from PODC 2003
Proceedings of the 3rd ACM workshop on Digital rights management
Universally Composable Signature, Certification, and Authentication
CSFW '04 Proceedings of the 17th IEEE workshop on Computer Security Foundations
Aggregate and verifiably encrypted signatures from bilinear maps
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Optimistic fair exchange of digital signatures
IEEE Journal on Selected Areas in Communications
Timeliness optimistic fair exchange protocol based on key-exposure-free chameleon hashing scheme
ICACT'10 Proceedings of the 12th international conference on Advanced communication technology
Optimistic fair priced oblivious transfer
AFRICACRYPT'10 Proceedings of the Third international conference on Cryptology in Africa
Efficient autonomous signature exchange on ubiquitous networks
Journal of Network and Computer Applications
A Practical Approach of Fairness in E-Procurement
International Journal of Information Security and Privacy
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Fair exchange protocols allow both or neither of two parties to obtain the other's items, and this property is essential in e-commerce. In this paper, we construct an optimistic fair exchange protocol that is applicable to any digital signature by prescribing three forms of signatures, namely presignature, post-signature and notarised signature. We set an expiration date for presignature, and thus realise the timely termination of the protocol. Next, we define an ideal functionality of fair exchange protocols in the universal composability framework. Then, we construct an optimistic fair exchange protocol based on the above protocol, and prove its security in the universal composability framework.