摘要
该文针对环签名存在的密钥泄漏问题,基于前向安全数字签名和双线性对,提出一种新的前向安全环签名方案。方案的前向安全性保证了签名密钥可定期更新,即使当前时间段的签名密钥被泄漏,敌手也不能伪造先前的签名。在全面考虑了实际攻击者的能力后,给出了方案在标准模型下的安全性证明。
Since the proposed ring signatures has the key exposure problem, a new forward-secure ring signature scheme based on bilinear pairings is proposed. Forward security of the scheme means that even if the secret key of current time period is compromised, some security remains. It is impossible to forge the signature relating to the past. Secret key is evolved with different period time while the public key is fixed in the life time. The scheme is proven to be secure against adaptive chosen message attack in the standard model.
出处
《电子与信息学报》
EI
CSCD
北大核心
2009年第2期448-452,共5页
Journal of Electronics & Information Technology
基金
黑龙江省自然科学基金(F2004-06)
哈尔滨工程大学基础研究基金(HEUFT05067)
黑龙江省博士后科研启动基金资助课题
关键词
环签名
前向安全
双线性对
标准模型
密钥更新
Ring signature
Forward-secure
Bilinear pairings
Standard model
Key evolution
