[Cryptech Tech] First data

Bernd Paysan bernd at net2o.de
Mon May 26 00:28:51 UTC 2014


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.

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/
-------------- next part --------------
A non-text attachment was scrubbed...
Name: data_2014-05-24.real.bin
Type: application/octet-stream
Size: 550124 bytes
Desc: not available
URL: <https://lists.cryptech.is/archives/tech/attachments/20140526/72415cc8/attachment-0001.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: histogram.pdf
Type: application/pdf
Size: 14085 bytes
Desc: not available
URL: <https://lists.cryptech.is/archives/tech/attachments/20140526/72415cc8/attachment-0001.pdf>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <https://lists.cryptech.is/archives/tech/attachments/20140526/72415cc8/attachment-0001.sig>


More information about the Tech mailing list