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Table 1 Hardware resources for RO PUF implemented on Virtex 4

From: A PUF-based cryptographic security solution for IoT systems on chip

Device utilization summary (estimated values using Xilinx XST)
Logic utilization Used Available Utilization (%)
Number of slices 2067 15,360 13
Number of slice flip flops 2674 30,720 8
Number of 4 input LUTs 4066 30,720 13