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http://dx.doi.org/10.13089/JKIISC.2002.12.6.125

An Efficient Method Defeating Blackmailing Using Blind XTR-DSA Scheme  

박혜영 (고려대학교 정보보호기술연구센터(CIST))
한동국 (고려대학교 정보보호기술연구센터(CIST))
이동훈 (고려대학교 정보보호기술연구센터(CIST))
이상진 (고려대학교 정보보호기술연구센터(CIST))
임종인 (고려대학교 정보보호기술연구센터(CIST))
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.12, no.6, 2002 , pp. 125-135 More about this Journal
Abstract
The electronic payment system based on blind signature is susceptible to the blackmailing attack as opposed to keep the lifestyle of users private. In this paper. we suggest an efficient electronic cash system using a blind XTR-DSA scheme, which improves the method of defeating blackmailing in online electronic cash systems of ［6,9］. In case of blackmailing, to issue the marked coins we use the blind XTR-DSA scheme at withdrawal. In ［6,9］, to cheat the blackmailer who takes the marked coins the decryption key of a user had to be transferred to the Bank. But in our proposed method the delivery of the decryption key is not required. Also, in the most serious attack of blackmailing. kidnapping, we can defeat blackmailing with a relatively high probability of 13/18 compared with 1/2 in ［9］ and 2/3 in ［6］. If an optimal extension field of XTR suggested in ［7］ is used, then we can implement our system more efficiently.
Keywords
DSA;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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