Journal of KIISE:Information Networking (한국정보과학회논문지:정보통신)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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An Efficient Micropayment System using a Session Key

세션키를 이용한 효율적 소액지불시스템

  • 정윤수 (충북대학교 전기전자컴퓨터공학부) ;
  • 백승호 (충북대학교 전기전자컴퓨터공학부) ;
  • 황윤철 (충북대학교 전기전자컴퓨터공학부) ;
  • 오충식 (한국과학기술정보연구원) ;
  • 이상호 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2005.08.01
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Abstract

A hash chain is highly efficient and attractive structure to use in electronic cash. Previous systems using hash chain are used extensively in various cryptography applications such as one-time passwords, server-supported signatures and microments. However, The most hash chain based systems using fro-paid method provide anonymity but have the problem to increase payment cost. Therefore, in this paper, we propose a new hash chain based microment system which improves efficiency using session key and guarantees user anonymity through blind signature in the withdrawal process of the root value without disclosing privacy Information.

해쉬체인은 계산속도가 빠른 해쉬함수를 이용하여 체인을 구성하는 구조이다. 이 구조를 이용하여 화폐를 만들면 해쉬연산만으로 화폐의 유효성을 확인할 수 있어 지금까지 주로 적은 금액이 빈번하게 교환되는 실명 거래 환경에서 응용되었다. 그러나, 소액지불과 같은 다양한 암호학 응용에 사용되고 있는 해쉬체인 기반 시스템들은 익명성으로 인하여 지불비용이 증가하는 문제점을 가지고 있다. 따라서, 이 논문에서는 지불비용이 증가하지 않도록 인출되는 과정에서 한번의 은닉서명으로 사용자의 익명성을 보장하며, 시스템에 사용하는 인증서의 역할을 세션키로 대체하여 효율성을 향상시킨 새로운 해쉬체인 기반 소액지불시스템을 제안한다.

Keywords

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