中文摘要：

限定验证者签名可以同时实现传统数字签名签名者身份的认证和保密,满足特殊场合的需要。提出了一个新的无证书可转换限定验证者签名,新方案满足无证书可转换限定验证签名的安全性要求,并在随机预言机模型和CDH困难问题假设下证明了新方案是安全的。从计算效率上分析表明新方案在签名阶段没有双线性对运算,明显优于Wu等人的无证书限定验证者签名方案。

英文摘要：

Limited verifier signature can solve the conflict between authenticity and privacy in the digital signature.This paper proposes a new certificateless convertible limited verifier signature which is provably secure under the random oracle model and the CDH assumption.This paper shows that the scheme satisfies all the requirements of the limited verifier signature schemes in the certificateless system.Comparing with the existing schemes,the new scheme is more efficient in computation.