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Re: Alpha Particles and One Time Pads
>Tim May sez:
> Here's a posting I just sent to sci.crypt, dealing with using alpha
> particle sources as noise sources for generating one-time pads.
>Why not use a back-biased germanium diode, or other noisy semiconductor
>junction? Seriously, the NRC has allowed the smoke detector people to
>spread those little radioactive chunks of Americium for too long.
>John Walker of AutoDesk actually built an IBM-PC card that generated
>random numbers from a radioactive source.
Q: how hard/cheap will it to build a shielded rs232 plud with a noisy diode
in it to provide a random number source?
I have written on a possible random number source for Sun SparcStations
(I and II). I have a program programs the audio chip to take input from
mic port 2 (which is not used in a SparcStation) then I turn up the
gain in the pre-amps and read the data of the from the DtoA.
I do not know how random it is yet (if anyone wants to run some tests
for me I will be happy to email them the program)