Security research on mobile IP network handover

Mobile node (MN) in MIP network engaging with correspond node (CN) can freely roam into different access routers (AR). However when MN from previous AR (PAR) roams into a new AR (NAR), the fast handover protocol will have to be engaged. Though the upper protocol such as IPSec will take care of the security handling, it is thought to be somehow insufficient and unconvincing. The upper layer protocol such as IPSec could only prevent leakage of data integrity by applying and agreeing upon certain encryption standards and could not prevent attacks such as the combination of denial of service (DoS) with Masquerading. This paper proposes two solutions to the above problem. One solution is to use the public key encryption algorithm, the other is that we introduce the Diffie-Hellman algorithm into the fast handover protocol.