Minimax control for cyber-physical systems under network packet scheduling attacks
2013 (English)In: Proceedings of the 2nd ACM international conference on High confidence networked systems, 2013, 93-100 p.Conference paper (Refereed)
The control of physical systems is increasingly being done by resorting to networks to transmit information from sensors to controllers and from controllers to actuators. Unfortunately, this reliance on networks also brings new security vulnerabilities for control systems. We study the extent to which an adversary can attack a physical system by tampering with the temporal characteristics of the network, leading to time-varying delays and more importantly by changing the order in which packets are delivered. We show that such attack can destabilize a system if the controller was not designed to be robust with respect to an adversarial scheduling of messages. Although one can always store delayed messages in a buffer so as to present them to the control algorithm in the order they were sent and with a constant delay, such design is overly conservative. Instead, we design a controller that makes the best possible use of the received packets in a minimax sense. The proposed design has the same worst case performance as a controller based on a buffer but has better performance whenever there is no attack or the attacker does not play the optimal attack strategy.
Place, publisher, year, edition, pages
2013. 93-100 p.
cyber-physical systems (CPS), estimation, long delays, minimax control, networked control systems (NCS), out-of-order messages, out-of-order packets, resilient control, security, Mini-max controls, Out of order, Algorithms, Controllers, Design, Embedded systems, Networked control systems, Computer crime
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-134467DOI: 10.1145/2461446.2461460ScopusID: 2-s2.0-84877628959ISBN: 9781450319614OAI: oai:DiVA.org:kth-134467DiVA: diva2:668723
2013 2nd ACM International Conference on High Confidence Networked Systems, HiCoNS 2013, as Part of CPSWeek 2013, 9 April 2013 through 11 April 2013, Philadelphia, PA
QC 201312022013-12-022013-11-252013-12-02Bibliographically approved