Abstract: Blind signcryption is that the blind signcrypter sees nothing about the signed message and can not trace the blind signcryption.By applying the concept of self-certified public key to blind signcryption，a new self-certified blind signcryption scheme based on Discrete Logarithm Problem（DLP） is presented.The new scheme keeps all kinds of security properties of blind signcryption；the system authority does not know the private key of the user；no certificate is required to verify the authenticity of public key；it has higher computational efficiency，lower communication overheads and better security，however，the algorithm is simple，so it is more suitable for applications in E-commerce and E-government.

Key words: self-certificate cryptology, blind signcryption, Discrete Logarithm Problem（DLP）, Diffie-Hellman problem

摘要： 盲签密指盲签密者对其所签署的信息是不可见的，而且签密消息不可跟踪。有机集成自认证公钥密码系统和盲签密思想，提出了一个新的基于离散对数问题（DLP）的自认证盲签密方案。所提方案具有盲签密的各种安全特性；权威机构不知道用户私钥；不需要对用户的公钥进行单独认证；具有计算效率高、通信成本低、安全性强和算法简单等优点，适合于在电子商务和电子政务中应用。

关键词: 自认证密码学, 盲签密, 离散对数问题, Diffie-Hellman问题