文章基本信息

标题：A Simple Off-line E-Cash System with Observers
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作者：Eligijus Sakalauskas ; Inga Timofejeva ; Aleksėjus Michalkovič 等
期刊名称：Public Policy And Administration
印刷版ISSN：2029-2872
出版年度：2018
卷号：47
期号：1
页码：107-117
DOI：10.5755/j01.itc.47.1.18021
语种：English
出版社：Kaunas University of Technology
摘要：A simple and transparent mobile e-cash system with observers is presented. Observers are cryptographic bank chips inserted in customer’s payment device, e.g. smart phone. System satisfies e-cash divisibility, anonymity, off-line payments, transferability and double-spending prevention requirements. Proposed e-cash system is based on two well-known cryptographic primitives, namely ElGamal encryption and Schnorr identification protocols, therefore it can be named as simple and transparent in the sense of security considerations. In Schnorr identification scheme Brand’s double spending prevention protocol is implemented during payment protocol. The use of observers allows to avoid e-cash data growing in size as it takes place in all divisible, anonymous, off-line and transferable e-cash systems. To increase observer’s security and avoid their clonability the use of physical unclonable function in the chip of observer is proposed.
关键词：e-cash;e-wallet;observers;physical unclonable function (PUF).