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← USA Mixer
One-time tape cipher machine
- this page is a stub
SIGTOT was an American One-Time Tape (OTT)
cipher machine (mixer)
that was developed in the US during WWII.
In the years following WWII, it was used by NATO
for traffic
of all classifications, alongside the British 5-UCO.
As both machines were always in short supply, they were eventually succeeded
by the Norwegian ETCRRM
and the Dutch Ecolex I and subsequently the
Ecolex II.
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SIGTOT was a big setup, consisting of several desks.
The image on the right shows part of the OTT tape reader as
it is on public display at the NCM in Fort Meade (US).
At present, no further information about the SIGTOT is available.
You can help expanding this page by providing additional information
and, if possible, one or more images of this machine. If you think
you can help, pleae contact us.
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- Wikimedia Commons, Onetime paper tape device used with SIGTOT...
Retrieved May 2014.
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© Crypto Museum. Last changed: Sunday, 25 February 2018 - 17:56 CET.
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![Image supplied by Daderot, via Wikipedia [1]](img/sigtot_nsa_full.jpg "Image supplied by Daderot, via Wikipedia [1]")