Secure lightweight obfuscated delay-based physical unclonable function design on FPGA

The internet of things (IoT) describes the network physical objects equipped with sensors and other technologies to exchange data devices over Internet. Due its inherent flexibility, field-programmable gate array (FPGA) has become a viable platform for IoT development. However, various security threats such as FPGA bitstream cloning intellectual property (IP) piracy have major concern this device. Physical unclonable function (PUF) is promising hardware fingerprinting technology solve above problems. Several PUFs been proposed, including implementation reconfigurable-XOR PUF (R-XOR PUF) multi-PUF (MPUF) on FPGA. these proposed drawbacks, high delay imbalances caused by routing constraints. Therefore, in study, we explore relative placement method implement symmetric obfuscated delay-based board. analysis result proves that our was successful. work achieved good quality uniqueness 48.75%, reliability 99.99%, uniformity 52.5%. Moreover, using obfuscation method, which an Arbiter-PUF combined random challenge permutation technique, reduced vulnerability against machine learning attacks 44.50%.