标准模型下的在线/离线多签名方案*

在线/离线多签名能够使多个用户对同一个消息快速地生成一个签名数据，此数据可以使验证者验证签名者的身份。签名生成过程中所需的大部分运算都在签名的消息给出之前进行，即进行预运算。在给出消息之后，再进行少量的运算得出签名。定义在线/离线多签名及其安全性，在Guo等人提出的在线/离线签名方案的基础上，运用Lu等人构造多签名的方法构造出一个具体方案。在标准模型下可证明它的安全性，并且阐述其高效性。

Online/offline multi-signature scheme in standard model

Online/offline multi-signature schemes allowed multiple users to efficiently sign on a common message and then generated a single signature. This paper convinced the verifiers that who had signed on the message. Computed most computations before the message was given. Only small quantities of computations were needed after the message was available. Gave the formal definition of the online/offline multi-signature and the security notion. Based on the online/offline signature proposed by Guo, with the method that used by Lu et al to construct multi-signature, gave a concrete scheme. It could be proven secure in the standard model, and it was efficient.