一个有效的无证书门限签密方案

An Efficient Certificateless Threshold Signcryption Scheme

在标准模型下提出了一个可证明安全的(t,n)无证书门限签密方案,当且仅当任意t个或多于t个成员合作才能够产生该密文.同时,对方案的不可伪造性和语义安全性给出了形式化的安全证明.最后,通过与已有方案相比指出本文方案更加安全高效.

A provably secure（ t,n） certificateless threshold signcryption scheme was proposed in the standard model,where the ciphertext can only be produced by arbitrary t or more members working together. In addition,the unforgeability and semantic security of the scheme were proved formally. In the last,the scheme was proved to be more secure and efficient in contrast with the existing schemes.