An Electronic Retail Payment System with Distributed Control--A Conceptual Design--

Tsutomu MATSUMOTO  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E78-A   No.1   pp.67-76
Publication Date: 1995/01/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
electronic payment,  funds transfer,  cash,  wallet,  card,  cryptography,  security,  

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Summary: 
This paper proposes an electronic retail payment system to provide flexible and efficient funds transfers with adequate security, reliability, circulativity, and anonymity even in large-scale applications. Funds are represented by a portable intelligent device called a card issued by a supervising organization, the system provider. Funds can be transferred from a card to another at an intelligent terminal called a mediator. To update the balance of each card, two digital signatures are generated by a three-party protocol conducted by the cards and mediator, and are encoded and appended to a write-once separate memory in the card. Old signatures are simultaneously nullified. Through a wired or radio non-real-time link, the generated signatures are periodically reported to the system provider to systemically manage possible abuses.