摘要
在线/离线签密方案具有资源耗费小的特点,但已有的在线/离线签密方案大多是是基于证书的密码体制或者基于身份的密码体制提出的,都存在证书的管理问题或密钥的托管问题。基于无证书密码体制的优点,提出了一种高效的无证书的在线/离线签密方案。分析表明,该方案不需要证书的管理,也没有密钥的托管问题,满足签密所要求的所有性质,且在效率上优于已有的基于身份的在线/离线签密方案以及无证书的签密方案。
On-line/off-line signcryption has the characteristics of low computation cost However, the existing on-line/off-line signcryption schemes arc based on certificate public key cryp tography and identity-based cryptography, which have the problems of certificate management or key escrow. Based on the merit of certificateless public key cryptography, an efficient certificateless on-line/off-line signcryption was proposed. The result shows that the new on-line/off-line signcryption scheme solves all the problems of certificate management and key escrow, and also satisfies all the required characteristics of signcryption. It is more efficient than the existed D）based on-line/off-line signcryption schemes and certificatcless on-line/off-line signcryption schemes.
出处
《计算机科学》
CSCD
北大核心
2010年第5期103-106,共4页
Computer Science
基金
国家自然科学基金资助项目(60602061)
国家自然科学基金资助项目(60803131)资助
关键词
在线/离线签密
无证书的密码系统
双线性对
随机预言模型
On-line/off-line signcryption Certificateless cryptography Bilinear pairings Random oracle model
