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Abuse-Free Optimistic Contract Signing [chapter]

Juan A. Garay, Markus Jakobsson, Philip MacKenzie
1999 Lecture Notes in Computer Science  
Most existing optimistic contract signing schemes are not abuse-free.  ...  We show that straightforward extensions to n > 2 party contracts do not work, and then show how to construct a three-party abuse-free optimistic contract-signing protocol.  ...  We say an optimistic contract signing protocol is secure if it is fair, complete, and abuse-free.  ... 
doi:10.1007/3-540-48405-1_29 fatcat:zxggkdbpxzd6jp6eae72ezzdoa

Three-Round Abuse-Free Optimistic Contract Signing with Everlasting Secrecy [chapter]

Xiaofeng Chen, Fangguo Zhang, Haibo Tian, Qianhong Wu, Yi Mu, Jangseong Kim, Kwangjo Kim
2010 Lecture Notes in Computer Science  
We introduce the novel notion of Verifiable Encryption of Chameleon Signatures (VECS), and then use it to design a three-round abuse-free optimistic contract signing protocol.  ...  We then use the notion to design a secret abuse-free optimistic contract signing protocol, which is only three-pass in the normal situation.  ...  Our abuse-free contract signing protocol has three sub-protocols: Exchange, Abort, and Resolve.  ... 
doi:10.1007/978-3-642-14577-3_23 fatcat:ahkqc3cfcnedlg7gwfm3zu3d5q

http://www.mecs-press.org/ijitcs/ijitcs-v9-n5/v9n5-1.html

Santosh Bharadwaj Rangavajjula, Tristan Claverie
2017 International Journal of Information Technology and Computer Science  
Therefore, those protocols are not appropriate to a real-world application and therefore proposed our algorithm that is abuse-free, optimistic, can have many signers and uses the industry standard which  ...  We identify the major advances in MPCS, highlight a few gaps with the current protocols and propose an algorithm for contract signing to be abusefree, optimistic for many signers in industrial standards  ...  Wang proposed an abuse-free, optimistic two-party contract signing in [5] using RSA and trapdoor commitment schemes [6] .  ... 
doi:10.5815/ijitcs.2017.05.02 fatcat:jiz5chx5avazhdwtkqc4w2yfhq

Contract Signing, Optimism, and Advantage [chapter]

Rohit Chadha, John C. Mitchell, Andre Scedrov, Vitaly Shmatikov
2003 Lecture Notes in Computer Science  
Optimistic contract signing protocols enable the signers to do so without invoking a trusted third party.  ...  We analyze optimistic contract signing protocols using a game-theoretic approach and prove a fundamental impossibility result: in any fair, optimistic, timely protocol, an optimistic player yields an advantage  ...  Malkhi for pointing out the vulnerability of optimistic players in fair exchange. We also thank I. Cervesato, S. Even, D. Gollmann, S. Kremer, J.F. Raskin, C. Meadows, and J.  ... 
doi:10.1007/978-3-540-45187-7_24 fatcat:f3evyv5ewvd3vfukdo3j7s32i4

Contract signing, optimism, and advantage

Rohit Chadha, John C. Mitchell, Andre Scedrov, Vitaly Shmatikov
2005 The Journal of Logic and Algebraic Programming  
Optimistic contract signing protocols enable the signers to do so without invoking a trusted third party.  ...  We analyze optimistic contract signing protocols using a game-theoretic approach and prove a fundamental impossibility result: in any fair, optimistic, timely protocol, an optimistic player yields an advantage  ...  Malkhi for pointing out the vulnerability of optimistic players in fair exchange. We also thank I. Cervesato, S. Even, D. Gollmann, S. Kremer, J.F. Raskin, C. Meadows, and J.  ... 
doi:10.1016/j.jlap.2004.09.003 fatcat:jpiowwu4rbfeldcjyefjow5lam

An efficient free fair contract signing protocol using OTPK

Bhagyashree Bodkhe, Pallavi Jain
2013 2013 Tenth International Conference on Wireless and Optical Communications Networks (WOCN)  
In 2011 Alfin Abraham [1] has proposed a Abuse-Free Optimistic Contract Signing Protocol which allow the two parties to sign the contract using digital signature.  ...  The trapdoor commitment scheme explained in makes this protocol an abuse free one where the abuse freeness is a necessary property in contract signing but is not very efficient as per the authentication  ... 
doi:10.1109/wocn.2013.6616226 dblp:conf/wocn/BodkheJ13 fatcat:anmejiqk7ffabg5lilzocdmp7e

A Novel Fair Anonymous Contract Signing Protocol for E-Commerce Applications

H Jayasree
2012 International journal of network security and its applications  
Like the existing LUCAS-based solutions for the same problem, our protocol is fair, anonymous and optimistic. Furthermore, the proposed protocol satisfied a new property, i.e., it is abuse-free.  ...  In the past, people usually sign a contract at the same time and same place face to face, but actually each party involved in contract may live in different part of earth, they want to sign something for  ...  However, different from all previous RSA-based contract signing protocol, the proposed protocol is further abuse-free.  ... 
doi:10.5121/ijnsa.2012.4509 fatcat:okwvb635cngzfdbwzvo4rk2lgm

On Fairness in Exchange Protocols [chapter]

Olivier Markowitch, Dieter Gollmann, Steve Kremer
2003 Lecture Notes in Computer Science  
Abuse-free digital contract signing protocols Recently Garay et al. [15] introduced the notion of abuse-free digital contract signing protocols.  ...  This means that, when using resilient channels, most of the optimistic contract signing protocols, are actually abuse-free, as a race condition decides of the outcome of the protocol.  ...  The TTP verifies whether the committed signature is valid and whether the signed description corresponds to the item Alice sent.  ... 
doi:10.1007/3-540-36552-4_31 fatcat:nee2ohkvkfdkjbdzzsyqr7kcau

Game-based verification of contract signing protocols with minimal messages

Ying Zhang, Chenyi Zhang, Jun Pang, Sjouke Mauw
2012 Innovations in Systems and Software Engineering  
A multi-party contract signing (MPCS) protocol is used for a group of signers to sign a digital contract over a network.  ...  The abuse-freeness attack leads us to a revision of the methodology to con-struct an MRT protocol.  ...  Mukhamedov and Ryan claimed that their protocol is abuse-free because of the use of PCS.  ... 
doi:10.1007/s11334-012-0180-9 fatcat:ok5gjatynfgorazquntmbydnou

DT-CP: A Double-TTPs Based Contract-signing Protocol with Lower Computational Cost

Guangquan Xu, Yao Zhang, Litao Jiao, Emmanouil Panaousis, Kaitai Liang, Hao Wang, Xiaotong Li
2019 IEEE Access  
INDEX TERMS Contract-signing protocol, abuse-freeness, double trusted third parties, trapdoor commitment scheme.  ...  To solve this problem, we propose a novel contract-signing protocol.  ...  He proposed an abuse-free contract-signing protocol with zero-knowledge protocol.  ... 
doi:10.1109/access.2019.2952213 fatcat:wjpuq4vkdzhppaeqnm4vrkrawa

Game-Based Verification of Multi-Party Contract Signing Protocols [chapter]

Ying Zhang, Chenyi Zhang, Jun Pang, Sjouke Mauw
2010 Lecture Notes in Computer Science  
Preliminaries This section describes the basic structure of an optimistic contract signing protocol with its underlying assumptions.  ...  A multi-party contract signing (MPCS) protocol is used for a group of signers to sign a digital contract over a network.  ...  This problem is addressed by the introduction of, so-called, optimistic multi-party contract signing protocols [1] .  ... 
doi:10.1007/978-3-642-12459-4_14 fatcat:txlk5urlvzajzgwer6gwe46z6m

Page 5473 of Mathematical Reviews Vol. , Issue 2003g [page]

2003 Mathematical Reviews  
With the help of Mur y, a finite- state verification tool, we analyze two related contract signing protocols: the optimistic contract signing protocol of Asokan, Shoup, and Waidner, and the abuse-free  ...  Summary: “Optimistic contract signing protocols allow two parties to commit to a previously agreed upon contract, relying on a third party to abort or confirm the contract if needed.  ... 

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

Guilin Wang
2010 IEEE Transactions on Information Forensics and Security  
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.  ...  Furthermore, the proposed protocol satisfies a new property, i.e., it is abuse-free.  ...  [23] , all other optimistic contract signing protocols [2, 3, 4, 6, 7, 33, 34] are not abuse-free.  ... 
doi:10.1109/tifs.2009.2035972 fatcat:jgpms42tuvejfjeutgb3zvx5sa

An abuse-free fair contract signing protocol based on the RSA signature

Guilin Wang
2005 Proceedings of the 14th international conference on World Wide Web - WWW '05  
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.  ...  Furthermore, the proposed protocol satisfies a new property, i.e., it is abuse-free.  ...  [23] , all other optimistic contract signing protocols [2, 3, 4, 6, 7, 33, 34] are not abuse-free.  ... 
doi:10.1145/1060745.1060807 dblp:conf/www/Wang05 fatcat:nmrqh5phnvc5zko5iqon4wfv4u

Finite-state analysis of two contract signing protocols

Vitaly Shmatikov, John C. Mitchell
2002 Theoretical Computer Science  
With the help of Mur', a ÿnite-state veriÿcation tool, we analyze two related contract signing protocols: the optimistic contract signing protocol of Asokan, Shoup, and Waidner, and the abuse-free contract  ...  Optimistic contract signing protocols allow two parties to commit to a previously agreed upon contract, relying on a third party to abort or conÿrm the contract if needed.  ...  Garay--Jakobsson--MacKenzie protocol In this section, we describe the abuse-free optimistic contract signing protocol of Garay et al. [17] .  ... 
doi:10.1016/s0304-3975(01)00141-4 fatcat:vau2mq2surcnfczmgc6fbpqhhu
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