Design of threshold dominant delay Physical Unclonable Functions in 65nm CMOS
Yuejun Zhang, Pengjun Wang, Jianrui Li, Gang Li · 2014
Physical Unclonable Functions (PUFs) exploits static process variation across integrated circuits in the manufacturing processes to generate many unique, random and unclonable security keys. In this paper, a threshold dominant delay PUFs (TDD-PUFs) is designed in TSMC 65nm CMOS technology. After configuring the nMOSFET and pMOSFET dominant delay, TDD-PUFs updates the key without physically replace. N stages threshold dominant delay cell, arbiter and other circuits are organized to realize TDD-PUFs. In custom designed, the layout of 128-bit TDD-PUFs occupies 358.62μm×154.65μm. Experimental results show that the randomness is about 100% over a range of environmental variations.