[Cryptech Tech] Some sampled noise and entropy collected

Joachim Strömbergson joachim at secworks.se
Wed Aug 27 17:31:30 UTC 2014


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Aloha!

I've continued to work on the FPGA part of the avalanche based entropy
source. I've gotten a Salea Logic 16 and connected it to the output of
the (second) sample register for the noise generated by Fredriks board.

The second probe is connected to the LSB of the entropy register that is
updated with the LSB of the free running counter when we detect a
positive flank in the noise.

The included image shows a bit of the collected data. It seems that the
noise toggles in excess of 200 kHz and the entropy toggles at more than
50 kHZ.

I can save the data sampled, the question is if I easily can use it for
analysis?

I will add a coretest + serial interface for data word extraction
tomorrow and on Friday. But it would be cool to just grab the data from
Logic and start doing analysis right now.

Pretty screen dump included.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim at secworks.se
========================================================================
-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2.0.22 (Darwin)
Comment: GPGTools - http://gpgtools.org
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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=q9kt
-----END PGP SIGNATURE-----
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screen Shot 2014-08-27 at 19.23.01 .png
Type: image/png
Size: 33580 bytes
Desc: not available
URL: <https://lists.cryptech.is/archives/tech/attachments/20140827/6a63b32e/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screen Shot 2014-08-27 at 19.23.01 .png.sig
Type: application/octet-stream
Size: 543 bytes
Desc: not available
URL: <https://lists.cryptech.is/archives/tech/attachments/20140827/6a63b32e/attachment-0001.obj>


More information about the Tech mailing list