Improving recovery probability of mobile hosts using secure checkpointing

In this work, we have proposed a mobility based secure checkpointing and log based rollback recovery technique to provide fault tolerance to mobile hosts in infrastructured wireless/mobile computing system, like, wireless cellular network. Mobility based checkpointing limits number of scattered checkpoint or logs in different mobile support stations that remain due to movement of mobile hosts. Secure checkpointing using low overhead elliptic curve cryptography ensures protection of checkpoint against security attack in both nodes and links and restricts access to checkpoint content only to the mobile host that is owner of the checkpoint. Log based rollback recovery ensures optimized recovery from last event using determinants saved in logs. Security attack to checkpoints leads to unsuccessful recovery. In case of security attack to checkpoint, recovery probability of a failed mobile host using secure checkpointing technique is 1 whereas that in checkpointing without security technique is <;1.