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arXiv 0909.1388cs.CR
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从配对论Diffie-Hellman与基于身份的密钥协商的关系

On the Relations Between Diffie-Hellman and ID-Based Key Agreement from Pairings

Shengbao Wang

摘要:

从配对的角度研究了传统的Diffie-Hellman密钥协商协议与基于身份的密钥协商协议之间的关系。对于Sakai-Ohgishi-Kasahara(SOK)基于ID的密钥构造,我们证明了与Diffie-Hellman协议相同的SOK密钥协商协议也有三个变体,即\emph{ephemeral}、\emph{semi-static}和\emph{static}版本.在此基础上,建立了认证Diffie-Hellman(Auth-DH)协议和基于身份的认证密钥协商(IB-AK)协议之间的联系,并针对这两类协议提出了两个\emph{substitution rules}.这些规则允许在两种类型的协议之间进行转换。特别是,我们获得了\emph{real}基于ID的版本的著名的MQV(和HMQV)协议。同样,对于Sakai-Kasahara(SK)密钥构造,我们证明了基于SK ID的加密方案(我们称之为“SK协议”)的密钥传输协议具有其非ID对应物,即Hughes协议。基于这一观察,我们建立相应的基于ID和非基于ID的协议之间的关系。特别是,我们提出了一个高度增强版本的McCullagh-Barreto协议。

英文摘要:

This paper studies the relationships between the traditional Diffie-Hellman key agreement protocol and the identity-based (ID-based) key agreement protocol from pairings. For the Sakai-Ohgishi-Kasahara (SOK) ID-based key construction, we show that identical to the Diffie-Hellman protocol, the SOK key agreement protocol also has three variants, namely \emph{ephemeral}, \emph{semi-static} and \emph{static} versions. Upon this, we build solid relations between authenticated Diffie-Hellman (Auth-DH) protocols and ID-based authenticated key agreement (IB-AK) protocols, whereby we present two \emph{substitution rules} for this two types of protocols. The rules enable a conversion between the two types of protocols. In particular, we obtain the \emph{real} ID-based version of the well-known MQV (and HMQV) protocol. Similarly, for the Sakai-Kasahara (SK) key construction, we show that the key transport protocol underlining the SK ID-based encryption scheme (which we call the "SK protocol") has its non-ID counterpart, namely the Hughes protocol. Based on this observation, we establish relations between corresponding ID-based and non-ID-based protocols. In particular, we propose a highly enhanced version of the McCullagh-Barreto protocol.

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