Physical Watermarking for Securing Cyber-Physical Systems via Packet Drop Injections

Conference · Mon Oct 23 04:00:00 EDT 2017

OSTI ID:1406349

Ozel, Omur ^[1]; Weekrakkody, Sean ^[2]; Sinopoli, Bruno ^[2]

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1. Carnegie Mellon Univ., Pittsburgh, PA (United States); University of Arkansas
2. Carnegie Mellon Univ., Pittsburgh, PA (United States)

Physical watermarking is a well known solution for detecting integrity attacks on Cyber-Physical Systems (CPSs) such as the smart grid. Here, a random control input is injected into the system in order to authenticate physical dynamics and sensors which may have been corrupted by adversaries. Packet drops may naturally occur in a CPS due to network imperfections. To our knowledge, previous work has not considered the role of packet drops in detecting integrity attacks. In this paper, we investigate the merit of injecting Bernoulli packet drops into the control inputs sent to actuators as a new physical watermarking scheme. With the classical linear quadratic objective function and an independent and identically distributed packet drop injection sequence, we study the effect of packet drops on meeting security and control objectives. Our results indicate that the packet drops could act as a potential physical watermark for attack detection in CPSs.

• Research Organization: Carnegie Mellon University
• Sponsoring Organization: USDOE Office of Electricity Delivery and Energy Reliability (OE)
• DOE Contract Number: OE0000779
• OSTI ID: 1406349
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION