Feasibility of a low-power, low-voltage complementary organic thin film transistor buskeeper physical unclonable function

Abstract

This paper demonstrates an implementation of physical unclonable function (PUF) using complementary organic transistors operating at low-voltage. PUF is an essential security element, and is important for various applications of organic devices. We implement a simple buskeeper PUF, which consists of two inverters. We confirm that the PUF bit values on the test chip can be read at a standard voltage for electronic circuits (3.3 V) via a standardized circuit board interface. We observed a low static current consumption (11.8 μA/90 bits) for the PUF chip. The PUF performance, chip-to-board interface performance, and requirements for the board interface in an organic transistor chip are discussed based on the measurement results of the test chip.