A Lightweight and Secure-Enhanced Strong PUF Design on FPGA

Abstract

Physical unclonable function (PUF) is a reliable physical security primitive. The Weak PUF and Strong PUF are two well-known PUF topologies. Strong PUF can be used to authenticate and protect intellectual property on FPGA chips. Classic PUF designs, like arbiter PUF, are hard to implement on FPGA and severely threatened by the machine learning based modeling attacks. In this work, we propose a new Strong PUF on FPGA by combining Weak PUF with obfuscation logic. Experiment results on a 28nm FPGA show that the resistance to modeling attack is good and the hardware overhead is small.