[Cryptech Tech] Fast(er) warm up of the TRNG.

[Leif Johansson]

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On 2014-03-14 09:52, Joachim Strömbergson wrote:
> Aloha!
> 
> Fredrik Thulin wrote:
>> Sure. I'm thinking maybe we can model that as an entropy
>> provider that provides entropy generate earlier? Maybe that
>> works, maybe not. Depends on how we end up mixing entropy from
>> providers of different speeds.
> 
> Yes, that is how I want to see it too - like just another entropy 
> provider. A bit like the external entropy injection we talked about
> on the meeting.
> 
> I have been thinking a bit more about the entropy combining
> operations. I see two ways:
> 
> (1) Try to equalize the rates. Could somehow be accomplished by 
> increasing the collected entropy counter more or less and do 
> corresponingly more or less overlap XOR:ing. This would still allow
> the source with higher rate to affect more of the entropy block
> though.
> 
> 
> (2) Ignore the difference in rate. Just add in a round robin way
> to avoid ignoring slower sources. And rely on the mixer to create a
> really well mixed seed.


The "only noisy diode good" argument is looking more and more sensible
to me from a pure simple-design standpoint... but then again I'm not
an electronics designer so take this with a fist-full of salt :-)

	Cheers Leif
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