[Cryptech Tech] Dieharder results for Cryptech RNG data

Joachim Strömbergson joachim at secworks.se
Sat Jan 3 08:06:11 UTC 2015


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Aloha!

Sorry for a late reply.

Benedikt Stockebrand wrote:
> just two questions:
> 
> - What options did you run dieharder with exactly?

- -a -g 201

That is all default test cases and external binary data.

> - What was the test set size? 200+ MB?  That's a long way short of 
> what you need for reliable results; if you did the full run, that 
> rgb_lagged_sum with ntuples==15 looks really bad.

That was the amount of data I had extracted at the time. I have more but
need to change the HW design to get better throughput. My blinkenlights
is hogging the output.


> That said, I guess we really need more specific tools (and 
> methodologies) for RNG testing.  Pretty much all the existing tests
> are kind of re-purposed non-crypto-grade PRNG tests and don't really
> help that much.
> 
> I've got a couple ideas on how to tackle this, but before I start to 
> code things I'd actually like to think it over, and talk it over
> with you next week as well.

Sounds really, really good. Thanks for feedback.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim at secworks.se
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