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
Fair exchange with a semi-trusted third party (extended abstract)
Proceedings of the 4th ACM conference on Computer and communications security
ACM Transactions on Computer Systems (TOCS)
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
Publicly verifiable secret sharing
EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
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
Receipt management- transaction history based trust establishment
Proceedings of the 2007 ACM workshop on Digital identity management
Fair exchange protocol of signatures based on aggregate signatures
Computer Communications
Double verifiably encrypted signature-based contract signing protocol
ICICA'10 Proceedings of the First international conference on Information computing and applications
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Contract signing conducted over the Internet arouses concerns of fairness. Two signing parties exchange their signatures in a fair manner, so that no party can gain an advantage over the other. This paper will discuss the security issues of signers' privacy and reliability of the system for the contract signing protocol. The trusted third party (TTP), responsible for maintaining the fairness in the protocol, cannot get useful information about the exchanged signatures by solving the dispute between two parties. The concept of semi-trusted third party (STTP) adopted from Franklin and Reiter's paper (in 1997) can be used to reach our goal. However, Franklin and Reiter's protocol uses an on-line third party and is inapplicable to the exchange of signatures. Hence, we propose an efficient contract signing protocol with off-line STTP using the aggregate signature proposed by Boneh and Gentry. Furthermore, the use of aggregate signature and bilinear pairings will effectually promote system reliability.