Time: Tuesday
Sept 23, 4pm Place: Gunness Student Center Conference Room. Refreshments will be served at 3:45pm. Title: Lightweight Authentication with Physically Unclonable Functions (PUFs ) Speaker: Berk Sunar, Professor of ECE, Worcester Polytechnic Institute Abstract: In this talk we outline a lightweight, tamper-resilient challenge-response authentication scheme. The scheme that we propose (HB+PUF) is a variant of the PUF-HB protocol which utilizes Physically Unclonable Functions (PUFs). The security of the scheme is reduced to solving the LPN problem in the active attacker model. The proposed scheme is tamper-evident due to the PUF properties. We present a proof of concept implementation for the proposed protocol. To generate the random bits needed for the protocol, the PUF circuit is reused as a Random Number Generator (RNG). This construction proves to be cost-effective since we will be using the same hardware for authentication as well as random number generation without incuring any significant overhead. The overall scheme including storage, tamper-resilience and RNG can be achieved with less than 2000 gates. The small footprint should be ideal for constrained environments such as RFID’s, smart cards, and sensor node networks. Short Bio: Berk Sunar received his BSc degree in Electrical and Electronics Engineering from Middle East Technical University in 1995 and his Ph.D. degree in Electrical and Computer Engineering (ECE) from Oregon State University in December 1998. After briefly working as a member of the research faculty at Oregon State University, Sunar has joined Worcester Polytechnic Institute as an Assistant Professor. Since July 2006, he is serving as an Associate Professor. He is currently heading the Cryptography and Information Security Laboratory (CRIS). Sunar received the National Science Foundation CAREER award in 2002. He was the co-editor of CHES 2005 and WAIFI 2007. His research interests include efficient cryptography and hardware security. Sunar is a member of the IEEE Computer Society, and the International Association of Cryptologic Research (IACR) professional societies. |
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