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TST
Tele Security Timmann

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.

 More About TST Timmann

TST Company logo

TST devices on this website
PPC-19 Printing Pocket Cipher Calculator, the first encryption device developed by Timmann (wanted item). TST-1221, TST-2225 and TST-3226 pocket electronic cipher machines (wanted item) TST 1530 Handycrypto, a portable electronic cipher machine (wanted item) TST-2305 ruggedized text encryptor with LED display (wanted item) TST-3010 hand-held military message encryptor TST 3550 portable electronic cipher machine TST-4043 data encryptor with HF modem TST-5500, computer modem (1200-28.800 baud) with built-in encryption. (wanted item).
Voice scrambler for HF radio (wanted item) Voice and data encryption system Encryptor for telex and computer data (also available as PCB)
PPC-19   wanted item
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
  

TST-1221   wanted item
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
  

TST-1530   wanted item
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
  
Bare TST 3550 cipher machine

TST-3010
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
  
TST-3010 military-grade message encryptor

TST-3550
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
  
Flight case with TST 3550, printer and acoustic coupler

TST-4043
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).

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TST-4043 front panel

TST-7595
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
  
TST-7595 voice encryption unit

TST-7700
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
  
TST-7700 voice and data encryptor

TST-9669   wanted item
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
  

Help required
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.

Further information
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Crypto Museum. Created: Tuesday 02 July 2013. Last changed: Friday, 04 August 2017 - 20:45 CET.
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