[Cryptech Tech] First data

[Stephan Mueller]

Am Montag, 26. Mai 2014, 02:28:51 schrieb Bernd Paysan:

Hi Bernd,

> Am Sonntag, 25. Mai 2014, 10:32:03 schrieb Joachim Strömbergson:
> > Aloha!
> > 
> > Attached is a compressed binary data file with the first batch of data I
> > extracted. I get 18% compression with gzip which shows that there are
> > some patterns to be found in the data.
> 
> Yes, looking at the file shows that the data was stored utf-8-encoded
> (Python artefact? ;-).  That is easy to compress ;-).  Converted to real
> binary attached (better compresion than gzip, slightly better than lzma). 
> This one is incompressible, but other tests (histogram over byte values,
> attached - that test revealed the utf-8 nature quickly ;-) suggest that the
> individual entropy generators have different biases.

But even with the real binary data, the Chi-Square result is not really 
convincing for a white noise. Thus we have to assume there quite a bias 
present.

Maybe some oversampling could help fix the skew?

Ciao
Stephan
-- 
| Cui bono? |