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Are there any general techniques for evading frequency based crypt analysis without using any encryption techniques?

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Why would you need to evade cryptanalysis period if you aren't using encryption? –  mikeazo Feb 17 '12 at 15:17
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Your question isn't really clear. What are you trying to do? –  Paŭlo Ebermann Feb 17 '12 at 19:00
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Compression tends to flatten frequencies, but is of course designed to be undone and thus has no crypto value by itself. –  GregS Feb 18 '12 at 17:52
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2 Answers 2

up vote 2 down vote accepted

Have a look at "Chaffing and winnowing: Confidentiality without encryption", RL Rivest, CryptoBytes (RSA laboratories), 1998. You can find the paper on scholar.google.com

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Yes i looked at this , thx ! but that doesnot help me . –  sashank Feb 18 '12 at 8:33
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@sashank but that doesnot help me – That comment really confuses me… if the answer was not helpful to you, why did you accept it? –  e-sushi May 28 at 3:19
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No.

Frequency-based cryptanalysis aims at breaking an encryption technique; hence evading frequency-based cryptanalysis implies an encryption technique.

Because frequency-based cryptanalysis is a poor attack, even some ridiculously weak encryption technique may evade frequency-based cryptanalysis. For example, putting the symbols alphabetically on two rings, using that as a correspondence table, and sliding the rings by one step after each use evades frequency-based cryptanalysis, at least in basic form.

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