[guardian-dev] The sound of an encrypted audio stream

[The Doctor]

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On 07/24/2013 06:11 PM, Tim Prepscius wrote:

> Are you dealing with the packets of a encrypted compressed audio
> stream? It might be interesting to determine the "randomness" of
> data? I would think, that if it is not random, there is a
> problem... ???

There is software out there that will help you make such an analysis:

http://www.phy.duke.edu/~rgb/General/dieharder.php

I have used this a fair amount in some of my older research:

http://www.fourmilab.ch/random/

This article will definitely be of interest because it describes a
one-liner for converting arbitrary streams of bits into images for
visual inspection:

http://scruss.com/blog/2013/06/07/well-that-was-unexpected-the-raspberry-pis-hardware-random-number-generator/

- -- 
The Doctor [412/724/301/703] [ZS]
Developer, Project Byzantium: http://project-byzantium.org/

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Rubbing the electric lamp is not particularly rewarding.  Anyway,
nothing exciting happens.

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