International Association
for Cryptologic Research

Physically unclonable functions (PUFs) exploit the unavoidable manufacturing variations of an integrated circuit (IC). Their input-output behavior serves as a unique IC \'fingerprint\'. Therefore, they have been envisioned as an IC authentication mechanism, in particular the subclass of so-called strong PUFs. The protocol proposals are typically accompanied with two PUF promises: lightweight and an increased resistance against physical attacks. In our prior CHES 2014 manuscript, we reviewed eight proposals in chronological order. This work comprehends a sequel. Most notably, five additional strong PUF protocols are included in our large-scale overview-analysis. Again, numerous security and practicality issues are revealed. Furthermore, we improve the transparency of our analysis by explicitly listing protocol requirements. These can also be used as a guideline for future protocol design. Finally, token privacy has been included in the analysis.