Re: Toaster to Generate Random Numbers
From: Bill Unruh (unruh@string.physics.ubc.ca)
Date: 01/09/03
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From: unruh@string.physics.ubc.ca (Bill Unruh) Date: 9 Jan 2003 01:44:58 GMT
"Omar Bohsali" <omarbohsali@omarbohsali.com> writes:
]Hello.
]Is it possible to use thermal noise to generate random numbers.
]My idea is the following:
]Get a toaster, and measure the noise generated by it. Amplify the noise, and
]then have it digitized by a program that will turn it into numbers.
??? a toaster? What aspect of the toaster do you plan on measuring to
get the noise?
Anyway, run a DC current through a resistor and measure the voltage.
This will give you a variety of noises. Some (1/f) have long time scale
correlations, some (higher frequency) is pretty white in spectrum.
]One question still lingers in my plan:
]Is thermal noise random?
No physical source is "random". They all have biases, correlations, etc.
You can work to get rid of them. Exactly how predictable they make the
noise is a different question. Ie, you might have a correlation which
affects say 1 bit out of 100 if you do not work very hard (ie 99 bits of
"randomness" per 100 bits).
]Some people say that it is, some say that it isn't.
]Please enlighten me.
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