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Need help about TRUE RANDOM NUMBER

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Hughes

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Hi, Friends,
Anyone knows the essential difference between pseudo number series and true number series?
I know that pseudo numbers in general have a repeated pattern while true numbers don't have. So pseudo numbers are predictable while true numbers is not. But what if a pseudo number series disturbed by an unpredictive source (such as flicker noise)? A series of pseudo numbers occasionally disturbed by a flicker noise seem to be unpredictive. Can we call them true random numbers?
 

Distribution curve of true random numbers is a Gaussian.
 

good idea

Your suggestion is exactly what is used in some encryption systems. A seed is determined by eithr galactic noise or the acces time of a hard drive and the PRNG is run through several cycles before another seed is found.
 

Do the random numbers have a spectrum? If yes, how to limit the spectrum?
 

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