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An Ultra-low Power and Lower Area Current-Mode based Physically Unclonable Function with less than 100nW Power Consumption and a Native Instability of 0.6875% for IoT Applications

This paper presents an ultra-low power and lower area, sequential physically unclonable function (PUF) circuit for Internet-of-Things (IoT). The proposed PUF is used to generate a 16 bit secret key array and uses a current-mode based differential bit cell architecture to exploit the inherent device mismatch. The proposed PUF design has an energy efficiency of 7.5fJ/bit and a native instability of 0.6875%.