Pre-Authentication and Authentication Models in Ad Hoc Networks

Abstract

Providing entity authentication and authenticated key exchange among nodes are both target objectives in securing ad hoc networks. In this chapter, a security framework for authentication and authenticated key exchange in ad hoc networks is introduced. The framework is applicable to general ad hoc networks and formalizes network phases, protocol stages, and design goals. To cope with the diversity of ad hoc networks, many configuration parameters that are crucial to the security of ad hoc networks are discussed. Special attention is paid to the initial exchange of keys between pairs of nodes (pre-authentication) and the availability of a trusted third party in the network. Next, several pre-authentication and authentication models for ad hoc networks are discussed. The models can be implemented as a part of the proposed security framework and correspond to the wide range of ad hoc network applications. Advantages and disadvantages of the models are analyzed and suitable existing authentication and key exchange protocols are identified for each model.