Low Probability of Intercept Waveforms via Intersymbol Dither Performance Under Multiple Conditions

摘要

The digital fingerprint (DF) creates a unique ID for any FPGA which cannot be tampered with or reproduced. The two most important factors in determining the success of a DF ID are its distinguishability and it stability. An ID must be robust enough so that it can distinguish a large number of chips and stable enough that it won't change when subjected to environmental changes. The DF methodology was automated. Then for distinguishability, it was tested on 60 circuits under ideal conditions as well as stressed by subjecting it to different supply voltages, a variety of different input values and different types of combinational circuits. Of these, it was concluded that input value and the type of combinational circuit used had the greatest influence on DF distinguishability. For stability, 60 digital circuits were stressed at different operating temperatures, supply voltages and input values. Here, it was determined that input value and operating temperature had the greatest impact on DF ID stability. These tests have given a greater understanding of the DF circuit and gives a guideline for creating future DF circuits with high distinguishability and stability.