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Journal Article ID-Based Optimistic Fair Exchange Scheme Based on RSA
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Authors
Taek-Young Youn, Ku-Young Chang
Issue Date
2014-08
Citation
ETRI Journal, v.36, no.4, pp.673-681
ISSN
1225-6463
Publisher
한국전자통신연구원 (ETRI)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.4218/etrij.14.0113.0351
Project Code
14NS5200, Development of Data Privacy Enhancing Technologies in Future Complex Computing Environments, Ku Young Chang
Abstract
Fairness of exchange is a significant property for secure online transactions, and a fair exchange scheme is a useful tool for ensuring the fairness of exchanges conducted over networks. In this paper, we propose an ID-based optimistic fair exchange scheme based on the RSA function, one which is designed by combining a wellknown RSA-based signature scheme and the (naive) RSA function. Note that the main contribution of this paper is to give the first provably secure ID-based fair exchange scheme based on the RSA function, whose security can be proved under fully formalized security models. Our scheme has the following additional strongpoints. The scheme is setup-free; hence, there is no registration step between a user and an arbitrator. Moreover, the proposed scheme is designed in an ID-based setting; thus, it is possible to eliminate the need for certificates and avoid some related problems. © 2014 ETRI.
KSP Keywords
ID-based, Optimistic Fair Exchange, Provably secure, Security model, Signature scheme, need for