一种可变门限值的门限签名方案

常见的门限签名方案只有一个门限值,在实际应用中,门限签名体制中联合签名的成员个数（门限值）是根据签名信息的性质而定的。重要的文档则需群中多名成员合作完成签名并对签名负责,如果是一般文档则群中一个成员就可完成签名。上述问题如采用普通门限签名方案解决则需多次重复实现才能完成,因此,效率非常低。文中提出一种方案,该方案群成员共享多个群秘钥,且每个群密钥对应一个门限值,根据实际需要,不同群密钥用于签名性质不同的文档。最后,任何人可通过相应的群公钥验证签名的正确性。

Threshold Signature Scheme with Dynamic Threshold Value

Common threshold signature had only one threshold value. In practical application, the threshold value of threshold digital signature depended on the significance of the document. Important document needed more of the co-operated users than common document to sign the document. The problem can be solved by using any existing threshold scheme repeatedly, but it was not efficient. The paper proposed a scheme that multi-secret could be shared by group member and different group secret had different threshold value to sign different document. At last, anyone could verify the validity of signature by group public key.