Post-processing and statistical checks Random number generation

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even given source of plausible random numbers (perhaps quantum mechanically based hardware generator), obtaining numbers unbiased takes care. in addition, behavior of these generators changes temperature, power supply voltage, age of device, or other outside interference. , software bug in pseudo-random number routine, or hardware bug in hardware runs on, may difficult detect.


generated random numbers subjected statistical tests before use ensure underlying source still working, , post-processed improve statistical properties. example trng9803 hardware random number generator, uses entropy measurement hardware test, , post-processes random sequence shift register stream cipher. hard use statistical tests validate generated random numbers. wang , nicol proposed distance-based statistical testing technique used identify weaknesses of several random generators.li , wang proposed method of testing random numbers based on laser chaotic entropy sources using brownian motion properties.








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