Novel PUF based on Generalized Galois Ring Oscillators with 10-15 EER and 0.53% BER

In this work, a novel Weak Physically Unclonable Function (PUF) suitable for FPGA based on 11-LUT Generalized Galois Ring Oscillators (GenGAROs) has been proposed. The GenGARO-PUF has been implemented in 40 Artix-7 FPGAs and 128-bit sequences have been generated for each device. The proposed PUF presents an average Inter-HD of 49.89 %, an average Intra-HD of 1.68 % and an Equal Error Rate (EER) of 2.71 · 10
^-15
. Our proposal has been compared to other state-of-the-art PUFs as well as with a conventional Ring Oscillator PUF (RO-PUF) implemented in the exact same locations of the FPGA. This analysis shows that the proposed PUF can outperform previously proposed PUFs in terms of EER. Finally, an alternative architecture of the proposal using 3-LUT GenGAROs has been implemented and analyzed, proving that it is possible to maintain a high identifiability (EER=6.43 · 10
^-14
) using considerably fewer resources of the FPGA.