ICCCAS Invited Speaker

Kentaroh Katoh

Fukuoka University, Japan




Biography: Kentaroh Katoh received the B.E. and M.E. degrees from Nagoya University, Nagoya, Japan, in 1997 and 1999, respectively, and the Ph.D. degree from Chiba University, Chiba, Japan, in 2009. From 1999 to 2001, he was employed with Fujitsu Ltd. He joined Chiba University in 2001. He worked with the Tsuruoka National College of Technology as an Associate Professor from 2011 to 2018. He was a Cooperative Researcher with the Division of Electronics and Informatics, Gunma University. He is currently an Assistant Professor of the Dept. of Electronics Engineering and Computer Science, Fukuoka University. His research interest includes reliability and security of analog and mixed signal LSI, data converter, and digital LSI. He is also interested in design of power circuits.                                                                                  
Speech Title: A Strong Physical Unclonable Function Using Dual Time-to-Digital Converters for AMD FPGAs
Abstract: We propose a Strong FPGA Physical Unclonable Function (PUF) for AMD FPGAs using two identical Time-to-Digital Converters (TDCs) with only Look-Up Tables (LUTs) and Flip-Flops (FFs). In normal operation mode, the proposed PUF operates as two independent single delay-line based TDCs (SL-TDCs). In PUF mode, the proposed PUF utilizes the remaining resources within the implemented Configurable Logic Blocks (CLBs) to construct identical TDCs with nonuniform delay and a wide measurement range. By simultaneously inputting the same time interval multiple times to these TDCs, delay measurements are performed. The response output is generated from the average delay difference obtained from the measurement results. By inputting a large time interval to the wide measurement range TDCs, the effects of manufacturing variations of the implemented chip appear as an average delay difference. Additionally, by compensating the measurement range variations of the two TDCs, improvements in uniformity and uniqueness are achieved.