Abstract:

The characteristics of Ad hoc networks require that the security approaches in Ad hoc networks must be lightweight. A new threshold signature scheme basd on the Chinese Remainder Theorem and clustering was presented for Ad hoc networks, and then a lightweight handover scheme was presented. The threshold signature scheme based on the cluster structure can guarantee the reality of cluster session key. The process of intercluster handover and intracluster handover can realize security handover quickly. The scheme can be used in different scale networks and can meet the dynamic topology of the Ad hoc networks. The mathematical proof and analysis show that the scheme is secure and have the ability to resist collusion attack.

Key words: :Ad hoc networks; the Chinese Remainder Theorem; threshold signature; clustering; security handover