Analysis and Improvement of Micali’s Fair Contract Signing Protocol

Bao, Feng; Wang, Guilin; Zhou, Jianying; Zhu, Huafei

doi:10.1007/978-3-540-27800-9_16

Cited by 42 publications

(40 citation statements)

References 16 publications

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“…Obviously, this property is truly meaningful for a practical system. The compatibility is met naturally, since our basic goal is to define each party's commitment to a contract as his/her standard signature on the contract, instead of a signature satisfying some special structures [3,33,7]. As we have mentioned in Introduction, this is also an appealing property since the contract signing protocol can be conveniently integrated into existing softwares for electronic transactions.…”

Section: Security Discussionmentioning

confidence: 99%

“…Actually, fair exchange includes the following different but related issues: contract signing protocols [20,12,16,6,2,4,23,33,7], certified e-mail systems [39,30,5,28,1], non-repudiation protocols [38,31,27], and epayment schemes in electronic commerce [15,34]. For more references and discussions on the relationships between those conceptions, please refer to [3,31].…”

Section: Related Workmentioning

confidence: 99%

“…However, Bao et al [7] pointed his contract signing protocol is actually unfair because there is an intrinsic flaw in the dispute resolution protocol, which is the policy exploited by the TTP to settle potential disputes between the two parties involved in a contract signing.…”

Section: Related Workmentioning

confidence: 99%

“…Consequently, this is an important security requirement for contract signing protocols, especially in the situations where partial commitments to a contract may be beneficial to a dishonest party or an outsider. However, except the discrete logarithm based scheme of Garay et al [23], all other optimistic contract signing protocols [2,3,4,6,7,33,34] are not abuse-free.…”

Section: Related Workmentioning

confidence: 99%

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An Abuse-Free Fair Contract-Signing Protocol Based on the RSA Signature

Wang¹

2010

IEEE Trans.Inform.Forensic Secur.

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A fair contract signing protocol allows two potentially mistrusted parities to exchange their commitments (i.e., digital signatures) to an agreed contract over the Internet in a fair way, so that either each of them obtains the other's signature, or neither party does. Based on the RSA signature scheme, a new digital contract signing protocol is proposed in this paper. Like the existing RSA-based solutions for the same problem, our protocol is not only fair, but also optimistic, since the third trusted party is involved only in the situations where one party is cheating or the communication channel is interrupted. Furthermore, the proposed protocol satisfies a new property, i.e., it is abuse-free. That is, if the protocol is executed unsuccessfully, none of the two parties can show the validity of intermediate results to others. Technical details are provided to analyze the security and performance of the proposed protocol. In summary, we present the first abuse-free fair contract signing protocol based on the RSA signature, and show that it is both secure and efficient.

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Section: Security Discussionmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

See 2 more Smart Citations

An Abuse-Free Fair Contract-Signing Protocol Based on the RSA Signature

Wang¹

2010

IEEE Trans.Inform.Forensic Secur.

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“…Fair exchange protocols can be classified into different groups based on the type of content exchanged: (i) fair document exchange protocols [4][5][6][7][8][9][10]; (ii) optimistic fair exchange protocols of digital signature [11][12][13][14][15]; (iii) electronic contract signing protocols [16][17][18][19][20][21][22]; and (iv) certified e-mail/e-goods delivery protocols [23][24][25][26][27][28][29][30]. Optimistic fair exchange protocols of digital signature and contract signing protocols exchange digital signatures fairly.…”

Section: Introductionmentioning

confidence: 99%

Provable Fair Document Exchange Protocol with Transaction Privacy for E-Commerce

Hwang

Lai

2015

Symmetry

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Abstract:Transaction privacy has attracted a lot of attention in the e-commerce. This study proposes an efficient and provable fair document exchange protocol with transaction privacy. Using the proposed protocol, any untrusted parties can fairly exchange documents without the assistance of online, trusted third parties. Moreover, a notary only notarizes each document once. The authorized document owner can exchange a notarized document with different parties repeatedly without disclosing the origin of the document or the identities of transaction participants. Security and performance analyses indicate that the proposed protocol not only provides strong fairness, non-repudiation of origin, non-repudiation of receipt, and message confidentiality, but also enhances forward secrecy, transaction privacy, and authorized exchange. The proposed protocol is more efficient than other works.

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