[time-nuts] are any time-nuts also random-nuts?

Bob Camp lists at cq.nu
Wed Dec 23 18:05:09 UTC 2009


Hi

If you do a Google for SIGTOT you head off to another bunch of people who
hook RNG's up to various things. My *guess* is that they likely hooked one
up to a computer back in the 1940's...

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Wednesday, December 23, 2009 12:39 PM
To: kpayea at bryantlabs.net; Discussion of precise time and frequency
measurement
Subject: Re: [time-nuts] are any time-nuts also random-nuts?

In message <82FEC3B10CF94496AFE52269282D7F34 at bryant1>, "Keith Payea" writes:
>Hello All:
>
>There are several electrical noise based random number generators, but most
>were concieved in a time when there was a lot less EM pollution of the
>airwaves.

Actually, that has always been a concern.

As far as I know, the first RNG to be connected to a computer was this
one:
	http://phk.freebsd.dk/misc/DASK_rng.pdf

And they specifically had to use a Lead-Acid battery as filament
supply for the noise diode to avoid EMC issues.

Poul-Henning

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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