摘要
以不经意多项式计算作为核心组件,提出了一个基于口令的密钥协商协议PSKA-I,该协议能够抵抗字典攻击但只能工作于认证模型。为解决协议PSKA-I这一缺陷,根据BCK安全模型设计了消息传输认证器,将协议PSKA-I转换为非认证模型中的安全协议PSKA-Ⅱ。上述协议口令的安全性由不经意多项式计算予以保证。与GL协议相比,该协议的通信及计算复杂度明显降低。
This paper proposed a password based key agreement protocol PSKA-I in authenticated model,which employed oblivious polynomial evaluation and was secure against dictionary attack. In order to resist active attack,designed a message transmission authenticator according to BCK security model which was used to transfer the protocol PSKA-I to protocol PSKAⅡ in unauthenticated model. The security of password in these two protocols was guaranteed by oblivious polynomial evaluation. Compared to protocol GL,the complexity of communication and computation of the protocols proposed was lower.
出处
《计算机应用研究》
CSCD
北大核心
2010年第10期3885-3888,共4页
Application Research of Computers
关键词
基于口令的密钥协商协议
不经意多项式计算
字典攻击
BCK安全模型
消息认证器
key agreement protocol based on passwords
oblivious polynomial evaluation
dictionary attack
BCK security model
message transmission authenticator
