[12957] in cryptography@c2.net mail archive
Re: Russia Intercepts US Military Communications?
daemon@ATHENA.MIT.EDU (Arnold G. Reinhold)
Thu Apr 3 13:47:01 2003
X-Original-To: cryptography@wasabisystems.com
X-Original-To: cryptography@wasabisystems.com
In-Reply-To: <3E89E53B.1DFEF2A@systemics.com>
Date: Thu, 3 Apr 2003 11:54:47 -0500
To: iang@systemics.com
From: "Arnold G. Reinhold" <reinhold@world.std.com>
Cc: cryptography@wasabisystems.com
At 2:15 PM -0500 4/1/03, Ian Grigg wrote:
>Some comments from about a decade ago.
>
>The way it used to work in the Army (that I
>was in) within a battalion, is that there was
>a little code book, with a sheet for a 6 hour
>stretch. Each sheet has a simple matrix for
>encoding letters, etc. Everyone had the same
>sheet, and they were created centrally and
>distributed from there. If any sheets were
>lost, it was a major disaster.
>
>All soldiers were taught to code up the messages,
>it was one of the more boring lessons. In
>practice, corporals and seargeants did most
>of the coding, but it was still a slow and
>cumbersome process.
The Army actually has a training course (from 1990) on-line that
describes such a system in detail. The cipher system, called DRYAD is
covered in
https://hosta.atsc.eustis.army.mil/cgi-bin/atdl.dll/accp/is1100/ch4.htm
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