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中国科学院研究生院学报 2007
On the untraceability of two group signatures
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Abstract:
Group signature allowsindividual membersto make signatures on behalf of the whole group.It can be used to constitute a very useful basic tool in many settings,such as E-cash,E-auction and E-election.Inthis paper,by very simple attacks we showthat the two group signatures proposed by Zhang et alin 2003 and Kimet alin 1996 are untraceable.In contrast tothose attacks presented by Wang et al,the techniques developedinthis paper are novel andinteresting.
