Re: Are natural languages secure ciphers?

From: Paul Schlyter (pausch_at_saaf.se)
Date: 10/06/03 

Date: Mon, 6 Oct 2003 06:51:30 +0000 (UTC)

In article <73b1ovot8e718mjvqbir0qsf080gqbsn9f@4ax.com>,
Mxsmanic <mxsmanic@hotmail.com> wrote:
 
> Joe Peschel writes:
>
>> A brute-force attack is not cryptanalysis.
>
> Not a brute-force attack ... brute-force cryptanalysis. In other words,
> cryptanalysis based exclusively on examination of a chunk of ciphertext,
> with no context, no plaintext, no algorithm, no key, nothing.
 
If there's no context, it wouldn't be particularly interesting to try
to "decrypt" the message. I mean, how would you even know whether its
some encrypted message at all? It could be line noise, or some other
kind of random numbers..... how would you know the difference?
 
 
>> Where did you get the idea that the algorithm and the key are the same
>> thing?
>
> Information theory.
 
Could you perhaps quote some relevant passage from a textbook which
inspired you to draw this conclusion?
  

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