An Off-Chip Based PUF for Robust Security in FPGA Based IoT Systems

In this paper, a new promising hardware security primitive physically unclonable Function (PUF) is implemented to generate a unique secret key for each SOC Board. Especially FPGA-based, IoT is most widely used for different applications. Several types of PUFs are designed and implemented due to their remarkable performance for hardware security applications. In most of the PUFs ring oscillators are mostly preferred, but these are for limited input. In this context, we proposed a new PUF without increasing the size of the hardware implementation, and power. In this research, we used simple XNOR and XOR gates to increase the number of inputs. Even though it is a weak PUF, generally, weak PUFs is the most preferable for implementation, and by increasing CRPs, one can make a weak PUF as strong. This Arbitrary PUF is implemented on the Artix-7 AC701 Evaluation platform using Xilinx Vivado 2019.1.