Enhanced McCullagh-Barreto identity-based key exchange protocols with master key forward security. (19th March 2010)

• Record Type: Journal Article
• Authors: Guo, H.; Mu, Y.; Zhang, X.Y.; Li, Z.J.
• Is Part Of: International journal of security and networks. Volume 5:Number 2/3(2010)
• Page Start: 173
• Page End: 187
• Publication Date: 2010-03-19
• Subjects: authenticated key exchange -- master key forward secrecy -- identity-based key agreement -- provable security -- identity-based cryptography; Computer networks -- Security measures -- Periodicals; 005.805
• Languages: English
• ISSNs: 1747-8405

Abstract

Master key forward security is an important property for identity-based key exchange protocols. Unfortunately, most of existing identity-based key exchange protocols do not satisfy this property. In this paper, we firstly analyse Xie's modified protocol to show that signature is undesirable for an identity-based key agreement protocol with the master key forward secrecy. Then we present two improved protocols from McCullagh-Barreto identity-based key agreement protocol to capture the master key forward security. Our first protocol is efficient and its security can be proved with the help of a decisional oracle, while the second one achieves stronger security and its security can be reduced to a computational problem in the random oracle model. The master key forward secrecy is proved under the computational Diffie-Hellman assumption.