多授权中心的基于属性的签名

Multi-authority Attribute-based Signature

现实生活中,用户的多个属性由一个授权中心管理,这势必会增大其工作负担,降低效率。为此,设计将用户的多个属性由不同的授权中心分别管理,额外需要一个可信的中心授权方来管理和约束各个授权中心,并构造一种新的签名方案。使用归约安全证明的研究方法证明所提出的方案的安全性归约为离散对数难题和计算Diffie-Hellman难题,并拥有保护用户的私密信息和较高的签名效率的优势。

In real life,many attributes of a user were monitored by a single authority,which would inevitably increase its workload and reduce its efficiency.In order to overcome this problem,a scheme whose attributes were managed by different authorities respectively was designed.At the same time,an additional credible central authority was introduced to manage and constraint these authorities and then a new multi-authority signature scheme was proposed.By using the methodology of reductionist security argument,the security of the scheme was proved equal to discrete logarithm problem and computational Diffie-Hellman problem.This scheme has some advantages,such as protecting the private information of a user,and a higher efficiency in signature.