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Telegraphy Cipher Machine
SELMA was a cipher machine for telegraphy signals (telex), developed by
Standard Telefon og Kabelfabrik A/S (STK)
in Norway in 1960. It is also known by its designator OKA-150 and was developed for the Norwegian Government.
SELMA is the abbreviation of Standard Electronic Letter Machine.
The image on the right shows a typical SELMA machine that features two
paper tape readers on its top surface. The exact function of the machine
is currently unknown, but it was probably some kind of off-line cipher machine
for One-Time Tapes, also known as a
mixer, much like the
earlier ETCRRM.
For the generation of suitable random key-tapes, STK had developed the special
KTP-3 key-tape production machine.
If you have any further information about this machine,
please contact us.
This page is a stub
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- Frode Weirud, Crypto Historian, Personal correspondence
Crypto Museum, June 2012.
- Norwegian National Security Authority (NSM), Årsmelding 2008
NSM Annual Report 2008 (Norwegian).
Noen kryptosuksesser. p. 15.
- Leif Nilsen, NISnet Kick-off
Thales Norway AS, PowerPoint presentation.
10 October 2007. Retrieved June 2012.
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© Copyright 2009-2013, Paul Reuvers & Marc Simons. Last changed: Sunday, 13 April 2014 - 11:26 CET
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