[Cryptech Tech] Noise board on Novena

[Joachim Strömbergson]

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Aloha!

Fredrik Thulin wrote:
> To clarify, I think such a requirement would be a written requirement
> directed to the designers of 3rd party entropy sources, not an FPGA
> enforced one. It is my understanding too that it is rather expensive
> to implement statistical tests over long series of output from the
> entropy sources in the FPGA.
> 
> I think the always-running tests of the entropy sources will be
> limited to making sure they are not stuck at some value, and maybe a
> test to make sure the overall distribution of 0 and 1 bits are
> somewhat close to 50%.

I think differently - and the tutorial yesterday seems to agree with me
(or I with it. ;-)

We should at least be able to do a subset with 4, 5, 6 or so of the
AIS31 tests, which are designed to be implemented in HW as on-line,
continiously running tests. Judging by the tutorial these tests can be
implemented with quite few resources.

https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Zertifizierung/Interpretationen/AIS_31_Functionality_classes_for_random_number_generators_e.pdf?__blob=publicationFile


The stuck-at total failure test will also be there (i.e FIPS 186-2 style
of breakdown detectiom.)

- -- 
Med vänlig hälsning, Yours

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