A Secure Threshold Group Signature Scheme and Its Implementation on the Elliptic Curve
Dong Liu · Computer Engineering and Science · 2009
It is an open problem to contrive a good threshold group signature scheme. Firstly, some weaknesses of a dynamic threshold group signature scheme are analyzed in this paper. And then a secure threshold group signature scheme based on the elliptic curve is proposed. All the members share the group secret. Any subgroup shares one shadow and the sum of all the shadows is the group secret. So it can withstand conspiracy attacks effectively.