LDCPUF: A novel FPGA-based physical unclonable function with ultra-low hardware cost

The physical unclonable function based on ring oscillator (RO PUF) is a traditional design suitable for FPGA implementation, but such designs have the disadvantage of low hardware efficiency. This article proposes new FPGA-based PUF, called loop delay configurable (LDC) PUF. construction LDC PUF relies units (CDUs). An configured with n CDUs can generate 2n-1(2n-1) response bits. Additionally, we apply programmable lines technology to enhance reliability Compared RO PUFs, has good uniqueness (48.52%) and (96.91%), most importantly, it ultra-low cost.