Physical Unclonable Functions (PUFs) are hardware security primitives that are increasingly\nbeing used for authentication and key generation in ICs and FPGAs. For space systems, they are a\npromising approach to meet the needs for secure communications at low cost. To this purpose, it is\nessential to determine if they are reliable in the space radiation environment. In this work we evaluate\nthe Total Ionizing Dose effects on a delay-based PUF implemented in SRAM-FPGA, namely a Ring\nOscillator PUF. Several major quality metrics have been used to analyze the evolution of the PUF\nresponse with the total ionizing dose. Experimental results demonstrate that total ionizing dose has a\nperceptible effect on the quality of the PUF response, but it could still be used for space applications\nby making some appropriate corrections
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