Application Research of Finance MIS with a Similar Group Signature

In the traditional group signature,all the members have the same rights to sign,and the threshold group signatrue only effect on a certain of the members sign together.The paper gives a new group signature scheme based on the two ideas.Comparing with traditional group signature the new scheme has some advantages:(1) scheme allows the members in the group have the different rights,and can ensure security;(2) the members in this group can not sign with skipping a grade