[GreenKeys] Here's a sweet one on the bay. (crypto machines)

[Lester Veenstra]

Anyone visit the Teletype crypto museum at their HQ?


Lester B Veenstra  MØYCM K1YCM W8YCM
lester at veenstras.com

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-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of
gfmurphy at earthlink.net
Sent: Saturday, May 18, 2013 8:17 PM
To: Greenkeys
Subject: Re: [GreenKeys] Here's a sweet one on the bay. (crypto machines)

To make the discussion on the Greenkeys list of the SIGABA machine go full
circle, it is noteworthy that SIGABA, SIGCUM, the KL-7 and the
KL-47 were all manufactured by Teletype Corporation.  It is very likely that
they manufactured other devices.  Take a look at Jerry Proc's page on the
KL-47.  Here's the link:
   <http://www.jproc.ca/crypto/kl47.html>
You'll see the Teletype Corp. logo on some items and you'll also see items
with Teletype part numbers.

Jerry Murphy


-----Original Message-----
>From: Jim Haynes <jhhaynes at earthlink.net>
>Sent: May 18, 2013 6:15 PM
>To: Christian Gauger-Cosgrove <captainkirk359 at gmail.com>
>Cc: nagle at animats.com, greenkeys at mailman.qth.net
>Subject: Re: [GreenKeys] Here's a sweet one on the bay. (crypto 
>machines)
>
>On Sat, 18 May 2013, Christian Gauger-Cosgrove wrote:
>
>>
>> During WWII, the US actually developed the "best" of the rotor cipher 
>> machines; it did require power drive, and was rather large. It was 
>> the SIGABA; which had a grand total of fifteen rotors, which were of 
>> the "Enigma" style wire scrambler rotors. As I mentioned in a 
>> previous e-mail; the SIGABA was not cracked until just a few years 
>> ago. At least publicly; if the NSA found a way to break it, they kept 
>> mum about that.
>>
>Also I've read that the U.S. issued new rotor sets once a year and had 
>a spare rotor set in reserve in case the in-use set was compromised.
>Whereas Enigma got a couple of rotors added during the course of the 
>war but the same ones were used throughout.



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