A Lightweight LFSR-Based Strong Physical Unclonable Function Design on FPGA

A PUF is like a fingerprint for a particular physical object, it is based on many manufacturing mismatches that occur during IC fabrication or the propagation delays that are present in the wires and interconnects. Physical unclonable function (PUF), a reliable physical security primitive, can be implemented in FPGAs and ASICs. Strong PUF is an important PUF classification that provides a large ‘‘Challenge Response’’ pairs (CRP) space for device authentication. However, most of the traditional strong PUF designs represented by the arbiter PUF are difficult to implement on FPGA. We propose a new lightweight strong PUF design that can dynamically reconfigure while maintaining high entropy and large CRP space.