Endorsed E-cash

被引：37

作者：

Camenisch, Jan ^{[1
]}

Lysyanskaya, Anna ^{[2
]}

Meyerovich, Mira ^{[2
]}

机构：

[1] IBM Corp, Zurich, Switzerland

[2] Brown Univ, Providence, RI 02912 USA

来源：

2007 IEEE SYMPOSIUM ON SECURITY AND PRIVACY, PROCEEDINGS | 2007年

关键词：

E-cash; digital signatures; fair exchange; threshold cryptography;

D O I：

10.1109/SP.2007.15

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

An electronic cash (e-cash) scheme lets a user withdraw money from a bank and then spend it anonymously. E-cash can be used only if it can be securely and fairly exchanged for electronic goods or services. In this paper, we introduce and realize endorsed e-cash. An endorsed e-coin consists of a lightweight endorsement x and the rest of the coin which is meaningless without x. We reduce the Problem of exchanging e-cash to that of exchanging endorsements. We demonstrate the usefulness of endorsed e-cash by exhibiting simple and efficient solutions to two important problems: (1) optimistic and unlinkable fair exchange of e-cash for digital goods and services; and (2) onion routing with incentives and accountability for the routers. Finally, we show how to represent a set of n endorsements using just one endorsement; this means that the complexity of the fair exchange protocol for n coins is the same as for one coin, making e-cash all the more scalable and suitable for applications. Our fair exchange of multiple e-coins protocol can be applied to fair exchanges of (almost) any secrets.

引用

页码：101 / +

页数：5

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