摘要
目前大多数基于身份认证密钥协商协议需要参与协议双方在同一个PKG环境下,而实际应用中需要在不同PKG环境下的用户之间也能进行安全通信。该文结合twin Diffie-Hellman问题提出了一个全新的不同PKG环境下的基于身份认证密钥协商协议。利用Cash等人在2008年欧密会上提出的"trapdoor test"技术在eCK模型中将新协议的安全性规约到标准的CDH和BDH假设。
Most available identity-based authenticated key agreement protocols require that both protocol participants are from the same PKG(Private Key Generator) environment.However,safe communication is requisite between protocol participants that are from different PKG environment in practice.In this paper,a new identity-based AKA(Authenticated Key Agreement) protocol is proposed in multiple PKG environment,which makes use of a new technique called twin Diffie-Hellman problem.Moreover,the security of the proposed protocol can be reduced to the standard CDH and BDH assumption in the eCK model,which makes use of the "trapdoor test" technology proposed by Cash et al in Eurocrypt 2008.
出处
《电子与信息学报》
EI
CSCD
北大核心
2010年第10期2393-2399,共7页
Journal of Electronics & Information Technology
基金
国家863计划项目(2009AA01Z417)
国家自然科学基金(2007B74)资助课题
关键词
密码学
认证密钥协商
基于身份
双线性对
不同PKG环境
TRAPDOOR
test技术
Cryptography
Authenticated Key Agreement (AKA)
ID-Based
Bilinear pairing
Multiple Private Key Generator (PKG) environment
Trapdoor test technology