COLLOQUIUM

Trustworthy and Secure Cyber Physical Systems: Approaches and Challenges Krishna Kumar Venkatasubramanian Postdoctoral Researcher University of Pennsylvania, Philadelphia, Friday, February 3rd, 2012 11:00 a.m. - 12:00 p.m. Fuller Labs 320 Abstract: The increasing ubiquity of a new class of environmentally coupled systems called Cyber Physical Systems (CPS), located both within us (e.g., defibrillators) and around us (e.g., smart rooms), present an enormous risk of exploitation. The recent news about cars being remotely hacked and SCADA systems in water treatment plants being accessed in an unauthorized manner are cases in point. Being able to build trustworthy and secure CPS is therefore crucial. The goal of this talk is to showcase two aspects of building trustworthy CPS. The first is establishing behavioral trust, that is, ensuring that the system’s underlying processes behave according to specific requirements. Measuring the behavioral trust of a system requires collecting well-defined metrics about the process behavior and evaluating them against a set of trust requirements, often specified as policies. Additionally, computational systems typically deal with generation, exchange, and consumption of information. In this context, behavioral trust only deals with the generative aspect of information. The exchange and consumption of information require ensuring information security in the form of preventing data tampering and unauthorized data access using cryptographic and access control primitives. In this talk, I present AS-CRED, an approach for computing behavioral trust on Autonomous Systems in inter-domain routing with respect to announcing anomalous updates. Subsequently, I present Physiological Signal based Key Agreement (PSKA) which enables information security through plug-n-play key distribution between sensors in a pervasive health monitoring cyber physical system, using common vital signs. Finally, I outline my future plans which involve applying behavioral trust to CPS settings and developing Cyber Physical Security Solutions (CPS-Sec), a new class of environmentally coupled information security solutions for CPS. _________ Krishna Venkatasubramanian is currently a Postdoctoral Researcher with the Department of Computer and Information Science, University of Pennsylvania, Philadelphia, PA. He received his Ph.D. degrees in Computer Science from Arizona State University, Tempe, AZ. His research interests include secure cyber-physical systems, body area networks, trust management, and medical device security. His research on Body Area Networks for pervasive health monitoring has been mentioned in the IEEE Engineering in Medicine and Biology Magazine issue on Wearable Technology in May/Jun 2010; and featured on the Discovery Channel website and in ACM Tech News. He has received two best paper awards for his papers on using physiological signals for key agreement and Wikipedia spamming. A list of his publications can be found at http://www.seas.upenn.edu/~vkris/ Host: Prof. Craig Wills Refreshments will be served at 10:45 a.m. in Fuller Labs – lounge area

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