Cryptology ePrint Archive: Report 2009/339

A Novel ID-based Electronic Cash System from Pairings

Jue-Sam Chou*1, Yalin Chen2 , Ming-Hsun Cho3 , Hung-Min Sun4

Abstract: Recently, Chen et al. and Juang et al. each proposed one and two e-cash payment systems respectively. They claimed that their schemes are secure. However, in this paper, we will present the shortcomings of their schemes and then propose a novel one from pairings. After security analysis and comparison, we conclude that our scheme not only is more secure but also possesses more functions that a secure electronic cash system should encompass than all of the proposed protocols.

Category / Keywords: cryptographic protocols / Electronic cash, e-cash, Off-line, Bilinear pairing, Blind signature, ID-based

Date: received 8 Jul 2009

Contact author: jschou at mail nhu edu tw

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Version: 20090713:020621 (All versions of this report)

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