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Voice, telegraphy and data encryptors
ELCRO was a family of encryption/decryption devices,
initially developed by Siemens in
München (Munich, Germany),
for a wide variety of applications, including
voice,
data,
facsimile
and teleprinter
traffic. Development and sales of the devices
was later taken over by ANT
and eventually by Rohde & Schwarz (R&S), who
continues to develop and market the devices to this day (2018).
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ELCROVOX ELCROTEL ELCRODAT ELCROBIT ELCROMUX
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In the ELCRO family, each type of device has a generic name that consists
of the word ELCRO with a three-letter suffix appended at the end, such as VOX
or TEL. The name can be written in upper case (e.g. ELCROVOX 1/3) or in
lower case (e.g. Elcrovox 1/3) The following types are known:
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- Narrow-band voice encryption
- Telegraphy (telex) encryption
- Data encryption (used in AUTOKO communication system)
- ISDN voice and data encryption (up to 64 kbps)
- Trunk encryption (multiplex) up to 2 Mbps
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ELCROVOX was a series of narrow-band speech encryptors used over
radio or via telephone (land) lines.
Elcrovox 1/3 was a military
voice encryptor that used a proprietary Siemens encryption algorithm.
Keys were loaded into the device by means of a short piece of punched
paper tape.
It was succeeded by the much smaller Elcrovox 1/4 that
used the secret NSA
SAVILLE encryption algorithm. Keys were loaded
into the device by means of a DS-102 fill unit, such as the
KYK-13 or the
KOI-18.
The Elcrovox 1/4 was interoperable with the American
STU-II crypto phone.
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ELCROVOX equipment on this website
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ELCROTEL was a series of encryption devices for
teleprinter (telex)
signals, generally using the 5-bit Baudot or ITA-2 standard,
running at speeds between 45.45 baud and 1200 baud.
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ELCROTEL equipment on this website
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ELCRODAT was a series of data and bulk encryptors, developed by
Siemens
for the AUTOKO data communications system, used by the German Army
(Bundeswehr). Both ELCRODAT and AUTOKO were also used by the 2nd Danish
Signal Battalion, to maintain contact with the German counterpart
610 GE SigBN in Rendsburg [3]. The name ELCRODAT is also used
for a series of desktop phone and fax encryptors, currently available
from Rohde & Schwarz.
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ELCRODAT equipment on this website
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ELCROBIT is a series of data encryptors, initially developed by Siemens.
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ELCROBIT equipment on this website
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ELCROMUX was a series of bulk encryption devices, also known as
trunk encryption devices, initially developed by Siemens and ANT
for data transmissions up to 2 Mbps.
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ELCROMUX 1/1 Bulk encryptor with optical interface ELCROMUX 1/2 Bulk encryptor with EUROCOM interface ELCROMUX 1/3 Bulk encryptor with CCITT interface
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© Crypto Museum. Created: Monday 26 March 2018. Last changed: Monday, 09 January 2023 - 11:08 CET.
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