Recently, Shim proposed a tripartite authenticated key agreement protocol from Weil pairing to overcome the security flaw in Joux’s protocol. Later, Shim also proposed an ID-based authenticated key agreement protocol which is an improvement of Smart’s protocol in order to provide the forward secrecy. In this paper, we show that these two protocols are insecure against the key-compromise imperso...

In this paper we propose a secure protocol for authenticated key agreement based on Diffie-Hellman key agreement, which works in an elliptic curve group. We also present a simpler authenticated key agreement protocol than the proposed one and a multiple key agreement protocol which enables the participants to share two or more keys in one execution of the protocol. We prove that our protocols m...

Providing a suitable authenticated key establishment protocol in MANETs is challenging due to all the characteristics of networks, such as communication capability, computation capability and storage resources. This paper presents an efficient and flexible authenticated key agreement protocol without bilinear pairings for MANET. Our proposed protocol not only provides mutual authentication betw...

We analyze the Password Authenticated Connection Establishment (PACE) protocol for authenticated key agreement, recently proposed by the German Federal Office for Information Security (BSI) for the deployment in machine readable travel documents. We show that the PACE protocol is secure in the real-or-random sense of Abdalla, Fouque and Pointcheval, under a number-theoretic assumption related t...