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Article #3592

Re: Languages

#3592
From: gwyn
Date: Sun, 17 May 1987 03:53
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In article <18919@ucbvax.BERKELEY.EDU> jmm@miro.Berkeley.EDU (James Moore) writes:
>Is knowing the original language of an encrypted message ever necessary
>for attempting to decipher it?

There are some systems for which one is likely to produce the correct
plaintext without necessarily understanding it, but this is not a
universal property of cryptosystems.

Often one can reduce the message to a simple substitution without
knowing what the language is.  Going from there to plaintext generally
requires some information about general characteristics of a language,
although the analyst need not be highly proficient in it.

I recall decrypting some messages in a simulation (part of a cryppy
training exercise) that were in English but kept mentioning the
"BANDITHUTH".  Took me a while to realize that this was the bandit,
Huth.  (Spaces are often omitted in field systems.)  Nonetheless I
had correctly decrypted it without understanding what it meant.
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References: <18919@ucbvax.BERKELEY.EDU>

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From: gwyn@brl-smoke.UUCP
Newsgroups: sci.crypt
Subject: Re: Languages
Message-ID: <5869@brl-smoke.ARPA>
Date: Sat, 16-May-87 23:53:12 EDT
Article-I.D.: brl-smok.5869
Posted: Sat May 16 23:53:12 1987
Date-Received: Sun, 17-May-87 09:01:37 EDT
References: <18919@ucbvax.BERKELEY.EDU>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
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