사생활 정보가 노출되지 않는 해쉬체인 기반 소액지불시스템 = Hash-Chain based Micropayment without Disclosing Privacy Information

국문 초록 (Abstract)

해쉬체인은 계산속도가 빠른 해쉬함수를 이용하여 체인을 구성하는 구조이다. 이 구조를 이용하여 one-time 패스워드, 서버지원 서명(signature) 그리고 소액지불과 같은 다양한 암호학 응용에 사용되고 있다. 그러나 선불방식에 사용하고 있는 대부분의 해쉬 체인기반 시스템들은 익명성을 지원하지만 익명성으로 인하여 지불비용이 증가하는 문제점을 가지고 있다. 따라서, 이 논문에서는 고객의 사생활 보호에 중점을 두면서 루트값이 인출되는 과정에서 한번만 은닉서명을 하여 사용자의 익명성을 보장하고, 시스템에 사용하는 공개키 대신 비밀키를 사용하여 인증서의 역할을 수행하지 않도록 효율성을 향상시킨 새로운 해쉬체인 기반 소액지불시스템을 제안한다.

다국어 초록 (Multilingual Abstract)

A hash chain is a structure organized by hash function with high speed in computation. Systems using the hash chain are using extensively in various cryptography applications such as one-time passwords, server-supported signatures and micropayments. However, the most hash chain based on the system using pre-paid method provides anonymity but has the problem to increase payment cost. In this paper, we propose a new hash chain based on the micropayment system to keep user anonymity safe through blind signature in the withdrawal process of the root value without disclosing privacy information, and to improve efficiency by using secret key instead of public key in the system without the role of certificate.

참고문헌 (Reference)

• 1 S. brands, "Untraceable Off-line Cash in Wallets with Observers" lncs 773 (lncs 773): 1993-, aug.
• 2 Nakanishi, "Unlinkable Divisible Electronic Cash" 121-134, isw2000lncs19752000.
• 3 T. Okamoto, "Universal Electronic Cash" Universal Electronic Cash Springer-Verlag 324-337, 1992.
• 4 M. S. Manasse, "The Millicent Protocols for Electronic Commerce" pp.117-123 : 1995.
• 5 Jing-Jang Hwang, "Securing on-line credit card payments without disclosing privacy information" 119-129, 2003.
• 6 K. Q. Nguyen, "Secure and Efficient Digital Coins" pp. 9-15 : 1997.
• 7 R. L. Rivest, "PayWord and MicroMint Two Simple Micropayment Schemes" lncs 1189 (lncs 1189): 1996-, apr.
• 8 C. Jutla, "PayTree:Amortized-Signature for Flexible MicroPayments" 213-221, nov.1996.
• 9 Y. Mu, "New Micropayment Schemes Based on PayWords Science 1270" Springer-verlag 283-293, 1997.
• 10 A. Herzberg, "Mini-pay:Charging per Click on the Web" 1997.
• 11 K. Q. Nguyen, "Micro-Digital Money for Electronic Commerce" pp.2-8 : 1997.
• 12 W. Mao, "Lightweight Micro-Cash for the Internet" lncs 1146 (lncs 1146): 1996-, sep.
• 13 T. Okamoto, "In Proceedings of Crypto'95 Lecture Notes in Computer Science" Springer-Verlag 438-451, 1995.
• 14 Schnorr,C.P, "Efficient Signature Generation by Smart Cards" no.3 : 161-174, 1991.
• 15 Chan, "Easy Come - Easy Go Divisible Cash" 561-1403 575, eurocrypt19981998.
• 16 Q. N. Khanh, "Digital Coins based on Hash Chain" pp.169-180 : 1999.
• 17 de Solages, "An Efficient Fair Off-line Electronic Cash System with Extensions to Checks and Wallets with Observers" 275-1465 295, fc19981998.
• 18 A. De Solages, "An Efficient Fair Off-Line Electronic Cash System with Extensions to Checks and Wallets with Observers" 275-1465 295, 1998.
• 19 Network Working Group, "AAA Authorization Appllication Examples" 2905-2905,