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A unique set of characteristics are packed in emerging nonvolatilereduction-oxidation (redox)-based resistive switching memories (ReRAMs) such astheir underlying stochastic switching processes alongside their intrinsichighly nonlinear current-voltage characteristic, which in addition to knownnano-fabrication process variation make them a promising candidate for the nextgeneration of low-cost, low-power, tiny and secure Physically UnclonableFunctions (PUFs). This paper takes advantage of this otherwise disadvantageousReRAM feature using a combination of novel architectural and peripheralcircuitry. We present a physical one-way function, nonlinear resistive PhysicalUnclonable Function (nrPUF), potentially applicable in variety ofcyber-physical security applications given its performance characteristics. Weexperimentally verified performance of Valency Change Mechanism (VCM)-basedReRAM in nano-fabricated crossbar arrays across multiple dies and runs. Inaddition to a massive pool of Challenge-Response Pairs (CRPs), using acombination of experimental and simulation, our proposed PUF shows areliability of 98.67%, a uniqueness of 49.85%, a diffuseness of 49.86%, auniformity of 47.28%, and a bit-aliasing of 47.48%.

A Physical Unclonable Function with Redox-based Nanoionic Resistive Memory