[GreenKeys] Fwd: Help in Understanding Navy Classified Message System 1965-1975

[David F]

Steve:


The KL-7 (and KL-47) made their rounds in all of the US military services,
but was phased out in the mid or late 1960s. The KL-7s were off line
encryption systems. In the '60s, the KW-7 came in to use and it was an
online encryption system. There were other crypto devices as well such
as the KW-26, KG-13, KG-84, etc for teletype and data encryption, Most 
voice encryption equipment was in the KY series.


IN the 60s, we (US Army) still had KL-7s in most CommCenters. They
were used primarily by Army units located on foreign military installatoins
that did not have thier own teletype circuit(s). For instance, some US Army
units were located on German Army sites. American troops had to encrypt
classified message traffic on the KL-7 which was then taken to the
German Army's CommCenter for transmission. Germany was a member
of NATO and NATO and US teletype circuits were connected and interfaced
at various Gateways. Most of these at the time, were Tape Relay Stations,
and later AUTODIN (for US), and other high speed data systems and networks.


Traffic was routed via Routing Indicators, which were common to US and
NATO and some non-NATO militaries.


Today, Routing Indicators are largely gone, as are Tape Relays and AUTODIN,
being replaced by the DDN (DMS) which is more like an email system within
DoD. Encryption is usually digitally embedded with little or no stand-alone
equipment involved.


In the Army, the KL-7s were NOT maintained by teletype repair people.
To work on any crypto gear, one had to be school-trained and had to meet
strict certification requirements. The NSA (and military services) did not
want to compromise the integrity of crypto gear by allowing untrained
repairmen to work on this equipment.


Dave
DE RUMLNHA


# # #




-----Original Message-----
From: Thomas Tillson via GreenKeys <greenkeys at mailman.qth.net>
To: steve.n4tty <steve.n4tty at gmail.com>; navy.radio <navy.radio at gmail.com>
Cc: greenkeys <greenkeys at mailman.qth.net>
Sent: Thu, Apr 26, 2018 6:53 am
Subject: Re: [GreenKeys] Help in Understanding Navy Classified Message System 1965-1975




FYI:


http://users.telenet.be/d.rijmenants/en/kl-7sim.htm


TT




In a message dated 4/26/2018 5:47:03 AM Eastern Standard Time, steve.n4tty at gmail.com writes:




Did the Navy use the KL-7 to encrypt traffic?  The AF used them and since it was mechanical as well as electronic it was maintained by TTY repair.


There is a good computer simulation of the KL-7 available online.


Steve G./N4TTY
Sent from my iPhone



______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys at mailman.qth.net

2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20180426/68ba3346/attachment.html>