[Cryptech Tech] ent for rosc entropy in the Xilinx FPGA

[Joachim Strömbergson]

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Aloha!

Great!

Russ Housley wrote:
>> Aloha!
>> 
>> First results using the ent tool on entropy extracted from the
>> rosc entropy source implemented in the Xilinx Spartan-6 device on
>> the Novena. this is based on 62 MByte data:
>> 
>> 
>> Entropy = 7.999998 bits per byte.
>> 
>> Optimum compression would reduce the size of this 67121200 byte
>> file by 0 percent.
>> 
>> Chi square distribution for 67121200 samples is 227.52, and
>> randomly would exceed this value 89.14 percent of the times.
>> 
>> Arithmetic mean value of data bytes is 127.5040 (127.5 = random). 
>> Monte Carlo value for Pi is 3.141248317 (error 0.01 percent). 
>> Serial correlation coefficient is 0.000081 (totally uncorrelated =
>> 0.0).
>> 
>> 
>> 
>> Not too shabby, it seems to be not totally b0rked.
>> 
>> I'm doing extraktion of more data. And if anybody wants the current
>> raw data to do further analysis just tell me.
>> 
> 
> I would like to take a look as well.
> 
> Russ
> 


- -- 
Med vänlig hälsning, Yours

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