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In this paper, we aim at increasing the strength of weak arbiter physical unclonable function (APUF) which are vulnerable to modeling attacks because of low uniqueness and randomness. We propose a unique technique which takes n × 1 challenge-response pairs (CRPs) from APUF and combines them with ring oscillators (ROs) implemented on the same FPGA to get n × n CRPs. We claim the proposed technique...
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