1 research outputs found
iSTRICT: An Interdependent Strategic Trust Mechanism for the Cloud-Enabled Internet of Controlled Things
The cloud-enabled Internet of controlled things (IoCT) envisions a network of
sensors, controllers, and actuators connected through a local cloud in order to
intelligently control physical devices. Because cloud services are vulnerable
to advanced persistent threats (APTs), each device in the IoCT must
strategically decide whether to trust cloud services that may be compromised.
In this paper, we present iSTRICT, an interdependent strategic trust mechanism
for the cloud-enabled IoCT. iSTRICT is composed of three interdependent layers.
In the cloud layer, iSTRICT uses FlipIt games to conceptualize APTs. In the
communication layer, it captures the interaction between devices and the cloud
using signaling games. In the physical layer, iSTRICT uses optimal control to
quantify the utilities in the higher level games. Best response dynamics link
the three layers in an overall "game-of-games," for which the outcome is
captured by a concept called Gestalt Nash equilibrium (GNE). We prove the
existence of a GNE under a set of natural assumptions and develop an adaptive
algorithm to iteratively compute the equilibrium. Finally, we apply iSTRICT to
trust management for autonomous vehicles that rely on measurements from remote
sources. We show that strategic trust in the communication layer achieves a
worst-case probability of compromise for any attack and defense costs in the
cyber layer.Comment: To appear in IEEE Transactions on Information Forensics and Securit