  Although surveillance and sensor networks play a key role in Internet of
Things, sensor nodes are usually vulnerable to tampering due to their
widespread locations. In this letter we consider data falsification attacks
where an smart attacker takes control of critical nodes within the network,
including nodes serving as fusion centers. In order to face this critical
security thread, we propose a data aggregation scheme based on social learning,
resembling the way in which agents make decisions in social networks. Our
results suggest that social learning enables network resilience, even when a
significant portion of the nodes have been compromised by the attacker.
Finally, we show the suitability of our scheme to sensor networks by developing
a low-complexity algorithm to facilitate the social learning data fusion rule
in devices with restricted computational power.
