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학술지 ID-Based Optimistic Fair Exchange Scheme Based on RSA
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저자
윤택영, 장구영
발행일
201408
출처
ETRI Journal, v.36 no.4, pp.673-681
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.14.0113.0351
협약과제
14NS5200, 미래 복합 컴퓨팅 환경에서의 데이터 프라이버시 강화 기술 개발, 장구영
초록
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.
키워드
Cryptography, Fair exchange, ID-based cryptosystem, RSA function, Setup-freeness
KSP 제안 키워드
ID-based cryptosystem, Optimistic Fair Exchange, Provably secure, Security model, Signature scheme, need for