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Car phone traffic analyser
- this page is a stub
Autotelefoon-decoder 1 (car phone decoder 1) was a
software package
with a complementary hardware interface
for the Commodore 64 home computer, for monitoring traffic on the
Dutch ATF-1 mobile telephone network,
produced around 1982 by SPYTECH in Arnhem (Netherlands). The software
was able to store, list and print all traffic, or to track specific
telephone numbers.
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ATF-1
was the very first circuit-switched public
mobile telephone network in the Netherlands, launched in 1980 by the state-owned PTT
(now: KPN).
It was a full-duplex analogue voice
system with digital signalling, operating in the 150 MHz band, with no
protection against eavesdropping. Only a simple
(computer) scanner was needed.
Furthermore, there was no encryption of the
digital data path, not even a simple form of obscuring.
When placing or receiving a call, the phone numbers were exchanged
between the base station and the mobile subscriber
in clear.
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Shortly after the launch of the
ATF-1 network, these weaknesses were
discovered by hackers, who were soon able to monitor all traffic on the
network by means of a cheap home computer — in this case a Commodore 64 —
that was connected to a simple computer scanner
by means of a suitable hardware adapter. The package was marketed by
(then) 27 year old Ronald de Groot
of SPYTECH in Arnhem (Netherlands) and was available from several
places including his own shop.
Although the software was officially aimed at computer enthusiasts and scanner
listeners – and might even have been useful for law enforcement purposes –
it was soon discovered by criminals, who made a living out of blackmailing
people, based on intercepted compromising conversations.
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- Commodore 64 home computer
- Scanner for the 150 MHz band
- ATF-decoder software package
- Hardware adapter (supplied with the package)
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- SPYTECH BV
P.O. Box ???
Arnhem
- SPYTECH
Diemen
020-993903
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ATF
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Autotelefoon
Name for the Dutch automatically-switched analogue carphone networks,
of which three generations have existed (nown as
ATF-1,
ATF-2
and ATF-3.
Succeeded in 1994 by GSM.
➤ More
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GSM
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Global System for Mobile Communication
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KPN
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Koninklijke PTT Nederland
Royal PTT of The Netherlands. This was the name of the former Dutch
state-owned telecom monopolist PTT after its privatisation in 1989.
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PTT
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Staatsbedrijf der Posterijen, Telegrafie en Telefonie
Dutch state-owned telecommunications monopolist from 1881 until its
privatisation in 1989.
Responsible for the development and operation of the post, telegraph
and telephone networks in the Netherlands. Also responsible for monitoring
the radio spectrum and for enforcing the telecom laws.
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© Crypto Museum. Created: Saturday 25 May 2019. Last changed: Tuesday, 22 August 2023 - 07:00 CET.
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