A Highly Reliable XNOR-XOR-RO PUF Design for IoT Security Applications

PUFs or Physical Unclonable Function is now an emerging trend for hardware and IoT (internet-of-things) security solutions. IoT solutions always have a poor security features and are vulnerable to external attacks. Hence, a highly reliable security solution is important for their implementation. This work presents a highly reliable physical unclonable function implemented in an FPGA for use in IoT security. The proposed PUF is implemented in Xilinx ZYNQ 7000 FPGA board and operates at 100 MHz. A novel XNX (XNOR-XOR) Ring Oscillator (RO) PUF with configurable frequency is presented in this report. A statistical measure is used to report the experiments done in the design. The proposed design gives a highly reliable output of 99.86%, uniqueness of 49.90%, and a uniformity of 67.30%. The proposed design offered the most reliable design compared to previous works.