[Cryptech Tech] Hardware entropy

Joachim Strömbergson joachim at secworks.se
Wed May 28 14:59:34 UTC 2014


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Aloha!

Bernd Paysan wrote:
> The sampling frequency (50MHz/DELAY_MAX) is the
> 
> parameter DELAY_MAX             = 32'h004c4b40;

Actually that is only the delay for the debug output blinkenlights. The
extraction process reads words (samples the current value) from the
entropy source whenever a command is received and is thus related to the
speed of the serial interface. Right now that is either 9600 or 256k.
Still way below one per cycle @ 50 MHz.

- -- 
Med vänlig hälsning, Yours

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