[cryptography] One Time Pad Cryptanalysis

Michael Rogers michael at briarproject.org
Thu Sep 26 14:49:28 EDT 2013


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On 26/09/13 17:36, Sandy Harris wrote:
> John Young <jya at pipeline.com> wrote:
> 
>> Tiltman vaunts the One Time Pad but cautions there have been
>> effective decrypts exploiting enthusiastic sloppy thinking that
>> OTP is unbreakable. Most appears to involve non-decipher means
>> and methods. The paper redacts others presumably still
>> effective.
> 
> Here's one, not always applicable but devastating when it is:
> 
> http://en.citizendium.org/wiki/Stream_cipher#Rewrite_attacks

Reuse of pads is also disastrous - VENONA made a breakthrough due to
pad reuse, which wasn't public knowledge at the time the paper was
written (though was by the time it was declassified).

Cheers,
Michael

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