Fig. 5: Statistical evaluation of PUFs.
From: Spectral sensitivity near exceptional points as a resource for hardware encryption
Entropy (Ex, Ey) of the 256-bits PUF response from 16 manufactured PUF instances for the DEP-based (a), EP-based (b), and traditional RF PUF system (c) used for the identification application. d–f are similar to a–c, but for the inter-Hamming Distances (inter-HDs) histograms obtained from the same PUF instances. The green histogram in d depict the intra-Hamming Distances (intra-HDs) obtained from 4 DEP-based PUF instances that were measured between −20 and 80 °C in an interval of 10 °C.
