Say, in some cases a genuine node can be compromised with malicious behavior, in such cases if we could make it inactive indirectly/directly, it is safe for communication? How many ways we can invalidate a node in WSN?
If an attacker accesses physically to nodes in the sensing area, he can compromise nodes and that nodes are non-returnable. Now, if a node has a malicious behaviour, I think that this node has to be avoided in communications until it becomes safe.