[Cryptech Tech] Hardware entropy

[Joachim Strömbergson]

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Aloha!

Joachim Strömbergson wrote:
> Short answer to your latest emails: Cool and thanks for doing this.
> I will try to recreate the results when I get back to my dev boards.

Short update on my implementation test:

I've created a FPGA project for testing Berndts FPGA entropy source and
integrate it into the coretest system:

https://github.com/secworks/coretest_bpaysan_entropy

Berndt: I didn't know what license you want use on your code so I just
added (C) 2014, Berndy Paysan to it. Is it ok to use 2-clause BSD?

Besides minor edits to get the code integrated into coretest it was
fairly easy going. I've also added a debug port that samples internal
values in the entropy source about 10 times/minute. The debug port is
connected to the LEDs on the dev board to give some direct feedback that
something is happening.

The project includes pin assignments, clocks etc needed to build the
system on the TerasIC C5G board. Quartus complains in the combinational
loops, but have no problems actually generating a FPGA design. The
resulting design requires 521 ALMs and 472 registers. Most of that is
from coretest and uart.

I have not yet been able to complete the SW needed to read out data from
the entropy source and save it to be able to run Dieharder on it. I will
try to do that the coming evenings.

If one wants to see the entropy source in action, there is a little 10
second movie with blinkenlights here:

http://secworks.se/wp-content/uploads/2014/05/fpga_entropy.mov

The LEDs at the lower right corner is the debug port and are currently
connected to the lower 8 bits of the n-vector in entropy.v

Very random. Much blinken. Wow.

- -- 
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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