## CryptoDB

### Paper: An Enhanced One-round Pairing-based Tripartite Authenticated Key Agreement Protocol

Authors: Meng-Hui Lim Sanggon Lee Youngho Park Hoonjae Lee URL: http://eprint.iacr.org/2007/142 Search ePrint Search Google A tripartite authenticated key agreement protocol is generally designed to accommodate the need of three specific entities in communicating over an open network with a shared secret key, which is used to preserve data confidentiality and integrity. Since Joux proposed the first pairing-based one-round tripartite key agreement protocol in 2000, numerous authenticated protocols have been proposed after then. However, most of them have turned out to be flawed due to their inability in achieving some desirable security attributes. In 2005, Lin-Li had identified the weaknesses of Shim's protocol and subsequently proposed their improved scheme by introducing an extra verification process. In this paper, we prove that Lin-Li's improved scheme remains insecure due to its susceptibility to the insider impersonation attack. Based on this, we propose an enhanced scheme which will not only conquer their defects, but also preserves the desired security attributes of a key agreement protocol.
##### BibTeX
@misc{eprint-2007-13424,
title={An Enhanced One-round Pairing-based Tripartite Authenticated Key Agreement Protocol},
booktitle={IACR Eprint archive},
keywords={Tripartite authentication, Key Agreement Protocol, Pairing},
url={http://eprint.iacr.org/2007/142},
note={Not published. meng17121983@yahoo.com 13624 received 20 Apr 2007, last revised 20 Apr 2007},
author={Meng-Hui Lim and Sanggon Lee and Youngho Park and Hoonjae Lee},
year=2007
}