Group oriented (t,n) threshold digital signature schemes have a problem in that the underlying signature schemes will be broken if any t or more shadowholders conspire together with each other,thus the group secret key will be revealed.

• 针对现有的(t,n)门限签名方案中所存在的当群内任何t个或更多个秘密分享成员联合攻击,能暴露系统的秘密密钥的问题,设计了一种能抵制群内成员联合攻击的可证实的具有系统稳定性的门限签名方案。