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2010
ACM

Improving the quality of ring oscillator PUFs on FPGAs

13 years 3 months ago
Improving the quality of ring oscillator PUFs on FPGAs
Physical Unclonable Functions (PUFs) based on Ring Oscillators (ROs) are a promising primitive for FPGA security. However, the quality of their implementation depends on several design parameters. In this paper, we show that ring oscillator frequencies strongly depend on surrounding logic. Based on these findings, we propose a strategy for improving the quality of RO PUF designs by placing and comparing ROs in a chain-like structure. We also show that an increased RO runtime and RO disabling has a clear positive effect on the quality of a RO PUF. We implemented a RO PUF key generation system on an FPGA using our design strategy. Our results clearly indicate that our proposed design strategy can significantly improve the quality of a RO PUF implementation. Categories and Subject Descriptors K.6.5 [Management of Computing and Information Systems]: Security and Protection General Terms Security, Measurement, Experimentation Keywords Physical Unclonable Function (PUF), FPGA, Ring Oscillat...
Dominik Merli, Frederic Stumpf, Claudia Eckert
Added 10 Feb 2011
Updated 10 Feb 2011
Type Journal
Year 2010
Where CASES
Authors Dominik Merli, Frederic Stumpf, Claudia Eckert
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