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List:       gnupg-devel
Subject:    Re: gnupg morphos port
From:       Werner Koch <wk () gnupg ! org>
Date:       2003-08-07 18:02:02
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On Thu, 7 Aug 2003 18:47:18 +0200, Adrian 'Dagurashibanipal' von Bidder said:

> Do you have access to some hardware counters? (blocks read/written to hd, 
> bytes sent/received from network, interrupt counters, does the system have 

All of them are predictable and don't make a good seed for a PRNG or
can even be used purely for a RNG.  According to Peter Gutmann,
network traffic and even its timing does not yield much entropy.

What you want is interrupt and disk command command timings becuase
these are variable values in general and not even identical from
machine to machine.  Stuff that EGD collects is at least influenced by
such parameters.  All in all it is not easy to get entropy from a
predictable machine.

> sensors, like temperature or fan speed? Things like that should generate 
> quite a bit randomness on the lower bits.

And line noise from audio ports


Shalom-Salam,

   Werner

-- 
Werner Koch                                      <wk@gnupg.org>
The GnuPG Experts                                http://g10code.com
Free Software Foundation Europe	                 http://fsfeurope.org


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