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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.

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TST Company logo

TST devices on this website
PPC-19 Printing Pocket Cipher Calculator, the first encryption device developed by Timmann (wanted item). Acoustic Pocket Terminal Portable message terminal 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 HF modem with FEC and (optional) voice and data encryption TST-5500, computer modem (1200-28.800 baud) with built-in encryption. (wanted item). Voice scrambler for HF radio (wanted item) Digital voice encryptor for HF/VHF/UHF radio 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.

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APT-60   wanted item
APT-60 was a miniature message terminal with built-in encryption facilities, at the size of a pack of cigarettes. It was available in a Latin and an Arabic variant and was commonly concealed in a leather cigarette carrying case.

The APT-60 has a built-in acoustic modem and is fully compatible with the portable DDT-300 message terminal below.

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DDT-300   wanted item
The DDT-300 was a portable message terminal with built-in encryption and decryption facilities, housed in an aluminium Haliburton briefcase.

It is compatible with the APT-60 miniature pocket device shown above. Messages can be sent at 300 baud through a regular telephone, using the built-in acoustic modem.

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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.

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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.

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Bare TST 3550 cipher machine

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.

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TST-3010 military-grade message encryptor

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.

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Flight case with TST 3550, printer and acoustic coupler

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-4045 was an HF, VHF and UHF radio modem with Forward Error Correction (FEC) and optional data and voice encryption. It is based on the Telefunken ETM-1820/M ECHOTEL modem, with additional cipher units added by TST Timmann.

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TST-4045 (ETM-1820M) prototype with handset

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.

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TST-7595 voice encryption unit

TST-7698 was a high-quality digital voice encryption unit, with excellent audio quality, for use on HF, VHF and UHF radio channels.

The device was also used as part of the TST-4045 HF data modem.

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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.

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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.

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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.

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Crypto Museum. Created: Tuesday 02 July 2013. Last changed: Sunday, 04 March 2018 - 12:22 CET.
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