Randomization enhanced Chaum's blind signature scheme

Authors:
Chun-I Fan;Wei-Kuei Chen;Yi-Shung Yeh
Affiliations:
Telecommunication Laboratories, Chunghwa Telecom Co., Ltd., TT5081, 12, Lane 551, Min-Tsu Road Sec. 5, Yang-Mei, Taoyuan 326, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin Chu 300, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin Chu 300, Taiwan, ROC
Venue:
Computer Communications
Year:
2000

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Abstract

At Crypto'99, Dr Coron, Naccache, and Stern presented a signature forgery strategy of the RSA digital signature scheme. The attack is valid on Chaum's blind signature scheme, which has been applied to many practical applications such as electronic cash and voting. In this paper we propose a method to inject a randomizing factor into a message when it is signed by the signer in Chaum's blind signature scheme such that attackers cannot obtain the signer's signatures of the special form for the attack.