[Cryptech Tech] Equal bytes

[Basil Dolmatov]

Joachim,

Russ pointed to not only presence of two consequtive equal bytes ( frequency should be no more than 1/256^2 ), but the presence of pattern "AA XY AA AA", probability of which should be incredibly small.

dol@ с iPad

> 12 дек. 2014 г., в 15:53, Joachim Strömbergson <joachim at secworks.se> написал(а):
> 
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> Aloha!
> 
> Russ, you should see the same issues in the latest data. I just wrote a
> tiny script that looks for consequtive equal bytes and get the same
> frequency in the old and the new data files:
> 
> Analyzed file: rosc_data_btsync/rosc_data.bin
> Total number of bytes: 67121200
> Number of equal bytes: 261655
> Frequency in file:     0.003898
> 
> Analyzed file: rosc_data_btsync/rosc_data2.bin
> Total number of bytes: 212097148
> Number of equal bytes: 828955
> Frequency in file:     0.003908
> 
> At least it is consistent. ;-)
> 
> - -- 
> Med vänlig hälsning, Yours
> 
> Joachim Strömbergson - Alltid i harmonisk svängning.
> ========================================================================
> Joachim Strömbergson          Secworks AB          joachim at secworks.se
> ========================================================================
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> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> 
> iQIcBAEBCAAGBQJUiuVWAAoJEF3cfFQkIuyNz/oQANJIRdxlNulWLJEwkxMUc6ty
> 98cjcrGl3nNjnaE7fhffmyNsIs4OBWKGdzqkU3jbBJQ/1lf6uGyFwxh5WLXiAJt8
> DmWtkKbwz1X6AT9M4xLpyOTH4lgln3yaj5MQRT1LknFfRPQbFc6DW8bijwP7fmkL
> VmUEazQ4u/GOPf25k0i16aTkIu3A+aqpXtbYEw6tqpw3qDyxQ3MdLdlkMsoqQn12
> WQapcDytOlTti06yd219dCwteGHpLhvRLWnV3UiowgOetZNiFoWWif1uJqGoA0Zl
> 4yGteITQR2mhFIMt21BREJwJ2TQ4/YP5bCIed8KOty2i4tnNG4O5/hw9yjw0NWpD
> rEHWuiY7fOxnUj5FHOPG6vH0SPnKnSs3O2aI3LpWHbv+FeJ6og/SU/tTh5/CEx91
> JaYHzgADXU7OC9Qn417gx1kHWXDniMPcgbniqMluGfTaB1ufrpxGODB06/DGrOP4
> 9dxlf/H9vA89vu9YC617BL+jEexzr5rou/DdUfQe9x2HHDeHhut6EV87ojAl7KIz
> pe14qVa4wU1nrLCLihIVDTTkHul2qYVffAeDCNc6qTusaZ0679Ox3R76XYAJxiI7
> 6Voz1VfQUaVg11bIrTw3oYWzN0ODWkXkjRap1hOvmd14fZsvu0fCWbTEWRef2NUc
> liwnX/W1gtXGyZIf/INk
> =f+f7
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