I f a node has been compromised then how to exclude that node
and that node only, from the sensor network is at issue. This
issue is solved by Localized Encryption and Authentication
protocol (LEAP). LEAP (localized encryption and authentication
protocol) is an efficient protocol for inter-node traffic
authentication. This protocol relies on a key sharing approach
that authorizes in-network processing, and at the same time
mitigates a number of possible attacks