【摘要】 通过结合前向安全数字签名方案和基于身份的群签名方案,提出一种新的前向安全基于身份的群签名体制。方案不仅具有前向安全性、匿名性、不可伪造性、无关联性和防陷害性等一般性的安全要求,同时还具有支持懒更新、签名长度短、追踪快捷、群成员的撤销即时、效率高等优点。因而该方案能够减小密钥泄露带来的不安全性,降低通信成本。更多还原

【Abstract】 By the forward security digital signature scheme and the ID-based group signature scheme,a new forward-secure ID-based group signature is presented.Using this method,the scheme not only realizes the common security requirements,such as the forward-security,anonymity,unforgeability,unlinkability and non-frameability,but also has support lazy update,short signatures,fast tracking of group signatures,immediate revocation of group members,and high efficiency.So the scheme can mitigate the damage caused by key exposure and reduce communication costs.更多还原