On the security of a convertible group signature scheme

被引:2
|
作者
Saeednia, S [1 ]
机构
[1] Free Univ Brussels, Dept Informat, B-1050 Brussels, Belgium
关键词
cryptography; group signature;
D O I
10.1016/S0020-0190(00)00009-0
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, we present two attacks on a group signature scheme proposed by Kim, Park and Won. We show how adversaries can forge secret keys linked to a set of groups that enable them to sign messages on behalf of those groups. The success of the attacks depends on the number of acceptable identities or more precisely, on what constitutes an acceptable identity. We also show how to modify the scheme to make the attacks ineffective, independently of the way identities are defined. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:93 / 96
页数:4
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