一种新的无双线性对的无证书安全签密方案

针对现有的无证书签密方案存在安全性不高、计算效率较低等诸多不足, 在Sharmila签密方案的基础上, 设计了一种新的无双线性对的无证书安全签密方案, 并在随机预言模型下证明了方案具有机密性和不可伪造性。同时, 该方案不需要双线性对和指数运算, 并且在确保安全性的前提下, 仅比现有的最高效签密方案多出两次点乘运算。

New secure cetificateless signcryption scheme without pairing

The known certificateless signcryption schemes have many problems, for example, lack of security, low computational cost and so on. This paper proposed a new secure certificateless signcryption scheme without pairings, which was based on Sharmila's. And it was provably secure in the random oracle model (ROM). The proposed scheme did no use of pairing and exponentation. And compared with the most efficient scheme, the proposed one just needs 2 more point multiplications under the secure circumstance.