Power-gated Static Random-Access Memory-based Physically Unclonable Function

An architecture and implementation of a Physically Unclonable Function (PUF) based on Static Random-Access Memory (SRAM) is developed to accommodate stochastic processing of PUF Response. An 8T-PUF cell is built to eliminate data retention and maximise physical mismatch. The power gating method is used to perform measurement on a subset of PUF cells repeatedly at a high rate. Two-phase power gating is applied selectively to parts of PUF matrix and is designed for minimising EMI and crosstalk amongst the cells during metastability resolution whilst maintaining high performance. The design is meant to serve as a platform for extraction of a variety of stochastic metrics for subsequent inclusion into PUF Responses, which comprises the novelty of the approach.