A Fair Electronic Cash System with Identity-Based Group Signature Scheme

Khalid. O. Elaalim, Shoubao Yang

Department of Statistic and Computer Science Faculty of Applied Sciences, Red Sea University, Port Sudan, Sudan.
School of Computer Science and Technology University of Science and Technology of China, Hefei, Anhui, China.

DOI: 10.4236/jis.2012.32021                

Abstract

A fair electronic cash system is a system that allows customers to make payments anonymously. Furthermore the trusted third party can revoke the anonymity when the customers did illegal transactions. In this paper, a new fair electronic cash system based on group signature scheme by using elliptic curve cryptography is proposed, which satisfies properties of secure group signature scheme (correctness, unforgeability, etc). Moreover, our electronic cash contains group members (users, merchants and banks) and trusted third party which is acted by central bank as group manager.

Keywords

Elliptic Curve; Bilinear Pairings; Group Signature; Electronic Cash; Trusted Third Party; Tracing Protocol

Conflicts of Interest

The authors declare no conflicts of interest.

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