Next Article in Journal / Special Issue
FPGA-Based Architectures for Acoustic Beamforming with Microphone Arrays: Trends, Challenges and Research Opportunities
Previous Article in Journal
BlendCAC: A Smart Contract Enabled Decentralized Capability-Based Access Control Mechanism for the IoT
Previous Article in Special Issue
Comparing the Cost of Protecting Selected Lightweight Block Ciphers against Differential Power Analysis in Low-Cost FPGAs
Article Menu
Issue 3 (September) cover image

Export Article

Open AccessArticle
Computers 2018, 7(3), 40;

Phase Calibrated Ring Oscillator PUF Design and Application

and *
Department of Electrical and Computer Engineering, University of Connecticut, Storrs, CT 06269, USA
Author to whom correspondence should be addressed.
Current address: 371 Fairfield Way, U-4157, Storrs, CT 06268, USA.
Received: 1 July 2018 / Revised: 20 July 2018 / Accepted: 24 July 2018 / Published: 26 July 2018
(This article belongs to the Special Issue Reconfigurable Computing Technologies and Applications)
PDF [9150 KB, uploaded 30 July 2018]


A Ring Oscillator Physical Unclonable Function (RO PUF) is an application-constrained hardware security primitive that can be used for authentication and key generation. PUFs depend on variability during the fabrication process to produce random outputs that are nevertheless stable across multiple measurements. Though industry has a growing need for PUF implementations on Field Programmable Gate Arrays (FPGA) and Application-Specific Integrated Circuits (ASIC), the bit errors in PUF responses become a bottleneck and limit the usage. In this work, we comprehensively evaluate the RO PUF’s stability on FPGAs, and we propose a phase calibration process to improve the stability of RO PUFs. We also make full use of the instability of PUFs to provide a novel solution for authentication. The results show that the bit errors in our PUFs are reduced to less than 1%. View Full-Text
Keywords: physical unclonable function; phase calibration; authentication physical unclonable function; phase calibration; authentication

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Yan, W.; Chandy, J. Phase Calibrated Ring Oscillator PUF Design and Application. Computers 2018, 7, 40.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Computers EISSN 2073-431X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top