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Tele Security Timmann
TST
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Tele Security Timmann (TST),
or Timmann GmbH,
was a company in Tützing (Germany)
that developed, manufactured and marketed electronic cipher equipment,
for governments, police forces and large corporations, both foreign and domestic.
The company was dissolved in 2009.
 About TST Timmann (history)
The following TST devices are covered on this website:
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This was the very first cipher machine developed by
Timmann, shortly after he established his own company in
the late 1970s.
It is based on an early (1975) HP-19C printing calculator,
has a key-length of 108 and was suitable for numbers only.
More information
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The TST-1221, TST-2225 and TST-3226, were electronic pocket cipher
machines that allowed text messages to be encrypted with three different
keys and a cipher period of 1080.
There were three different versions: one for writing down the text manually,
one for sending it over radio and one with a built-in acoustic modem,
suitable for analogue telephone lines.
More information
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The TST-1530 was also known by its registered trademark HANDYCRYPT.
It was based on an existing Tandy TRS-80 Model 100 portable computer
that was enhanced with a internal crypto board and additional software.
It was intended for the low-end civil market.
More information
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The TST-3010 was a military-grade hand-held cipher machine for the
encryption of messages that could be sent via radio, or via standard
telephone lines, using an acoustic modem.
The unit was available in Latin and Arabic writing.
Is was normally used inside a briefcase, but could also be used
stand alone. For mounting inside (military) trucks, a ruggedized version
was available.
More information
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The TST-3550 was a portable cipher machine for civil applications, developed
in the early 1980s.
The unit was usually packed inside a briefcase, together with a thermal
printer.
The TST-3550 was based on standard portable computer (i.e. home
computer) of the era, expanded with a TST crypto card.
More information
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For many years, the TST-4043 was the work horse of the German Government
for secure communication at the highest level.
The unit was used for sending Baudot and/or ASCII and consists of a
TST crypto card and an HF radio modem, and used advanced Forward Error
Correction (FEC).
More information
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The TST-7595 was a high-end voice scrambler that was used in situations
were true (digital) encryption was not possible, e.g. when using old
radio equipment on narrow-band HF channels.
It delivers maximum security by employing three types of voice scrambling
simultaneously: time domain, frequency domain and inversed frequency domain.
More information
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The 7700 was a high-end telephone encryptor that was placed between
a standard telephone set and the line, or between an PABX and the line.
Is was fully TEMPEST compliant and was suitable for communication at the
hight level.
The unit was available with a variety of vocoders, such as LPC-10,
at different data speeds, depending on the quality of the line.
It was later replaced by the TST-7790.
More information
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The TST-9669 was a universal data encryptor for telex
signals (Baudot) and computer data (ASCII). It could be
connected directly between the terminal and the line,
but was also available without the built-in modem (TST-9667).
Due to the universal approach of the TST-9669, the encryption
card was also used in a number of other TST products. In
addition, it was available as a third-party OEM module.
More information
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Although TST played a significant role in the international world of
cryptography during the 1980s and 1990s, the company is relatively unknown.
As a result, TST cipher machines are rare and documentation is even rarer.
Mid-2013, Crypto Museum managed to secure some historical TST devices,
but most of them came without any documentation whatsoever. If you have
any information, such as brochures, user manuals and circuit
diagrams, please contact us.
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© Copyright 2009-2013, Paul Reuvers & Marc Simons. Last changed: Friday, 13 September 2013 - 17:35 CET
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