摘要
在传统数字签名机制中,用户的公钥需要由经过可信第三方(TTP)签名的证书来保证其可靠性,而Sham ir的基于身份的签名机制尽管不再需要证书,但用户的私钥将无法避免地被TTP所托管。结合无证书公钥技术和盲签密思想,使用双线性对提出了一个新的基于无证书的盲签密方案。分析表明,新方案保持了盲签密的各种安全特性;解决了基于证书和基于身份密码体制中的证书存在的问题和密钥托管问题;在计算量方面,该方案只需两次双线性对运算,效率非常高。
In traditional digital signature schemes,certificates signed by a trusted party（TTP） are required to ensure authenticity of the public keys of users.Shamir＇s identity-based public key cryptography does not need the certificates,however,the key escrow of user＇s private key is inherent.In the paper,we propose a new certificateless blind signcryption scheme from bilinear pairings by applying the concept of certificateless public key to blind signcryption.Under the condition of keeping all kinds of security characteristics of blind signcryption,it is showed that the new scheme does not need the certificates of the public keys in the certificate-based cryptography and overcomes the inherent key escrow problem in the identity-based cryptography;Furthermore,it only requires two pairings operations,so its efficiency is very high.
出处
《计算机应用与软件》
CSCD
2010年第7期71-73,共3页
Computer Applications and Software
基金
教育部科学技术研究重点项目(208148)
关键词
无证书公钥
盲签密
双线性对
无证书盲签密
Certificateless public key Blind signcryption Bilinear pairings Certificateless blind signcryption
