一个新型的前向安全门限数字签名方案

针对前向安全门限数字签名无法阻止攻击者伪造之后时间周期所产生的签名等问题，利用单向Hash链技术提出了一个具有后向安全检测的新型前向安全门限数字签名方案.该方案不仅具有前向安全性而且具有后向安全性，即在当前时间周期群组签名私钥或群组成员的子签名私钥泄露时，不会影响以前时间周期和之后时间周期签名的安全性.分析表明，该方案可防止内部欺骗和抵抗伪造攻击，具有较高的安全性，能够有效阻止攻击者伪造各个时间周期产生的签名.

A novel forward secure threshold digital signature scheme

In order to solve such problem that the forward secure threshold digital signature could not prevent the attacker from counterfeiting the signature in the later time period,a novel forward secure threshold digital signature scheme with the backward secure detection was proposed using one-way Hash chain technology.The proposed scheme achieves not only the forward security but also the backward security.Namely,when the group signature secret keys or the sub-group signature secret keys of group members in current time period were disclosed,the signature security in both former and later time periods would not be influenced.The analysis shows that the proposed scheme can avoid the internal deception and resist the counterfeit attack.Moreover,the proposed scheme has the higher security,and can effectively prevent the attackers from counterfeiting the signature in each time period.