Fairness of Optimistic ID-Based Concurrent Signature Schemes
Journal Title: International Journal of Advanced Research in Computer Engineering & Technology(IJARCET) - Year 2013, Vol 2, Issue 5
Abstract
Concurrent signature scheme was introduced by Chen, Kudla and Paterson in Eurocrypt 2004. In these concurrent signature schemes, two parties can produce two ambiguous signatures. These signatures bind to their true signers concurrently only when an extra piece of information (namely the keystone) is released by either of the two parties. The concept of original concurrent signature schemes is that both parties must have the true fairness in exchanging the signatures mutually. Huang, Chen and Wang improved two ID-based perfect concurrent signature schemes in 2007. However, this paper points out that their schemes are unfair because the initial signer can cheat the matching signer. Therefore, the initial signer has more advantages than the matching signer. According to this observation, we modify these schemes to achieve the true fairness of two ID-based perfect concurrent signature schemes and also propose these schemes to get the accountability property
Authors and Affiliations
Pearl Ei Phyu
Keywords
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- EP ID EP109662
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