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Ring Oscillator (RO) Physical Unclonable Function (PUF) is one of the most popular silicon PUFs which exploit manufacturing variations during the chip fabrication process. RO PUF can generate secret bits by comparing the frequency difference between two ROs. However, previous RO PUFs improve flexibility and reliability through adding redundant ROs and thus incur unacceptable hardware overheads. In...
Physical Unclonable Function (PUF) is one of the most efficient technique to generate unique and random identification for chip authentication. Ring oscillator (RO) PUF takes advantage of delay variations of a pair of ROs, which is easy to implement on FPGAs. An important consideration for FPGA based RO PUF is how to eliminate systematic variation without reducing the number of output bits. To address...
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