ID-Based Key Agreement with Anonymity for Ad Hoc Networks

Security support is a must for ad hoc networks. However, existing key agreement schemes for ad hoc networks ignore the issue of entity anonymity. Without anonymity, the adversary can easily identify and track specific entities in the communications. Not only entities’ movement information is valuable to the adversary but also the adversary can launch heavy attacks on those important nodes, based on the information. This paper proposes an ID-based n-party ( 2  n ) key agreement scheme that preserves entity anonymity from outsiders. The scheme is efficient and very suitable for the structure-free mobile ad hoc networks. The security of the schemes is proved in a modified Bellare-Rogaway model.