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SEC - 13
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SEC - 13
Entwicklungs-beginn : Mitte 1970 Israel
Schlüsselsystem : keine Angaben
Arten der Chiffrierverkehre : keine Angaben
kryptologische Festigkeit : keine Angaben
Betriebsart : keine Angaben
Übertragungsart der Information : Sprache
Information :
Tadiran SEC-13
Voice crypto unit 

The SEC-13 was a voice crypto system developed in the mid-1970s by Tadiran in Israel. It was intended for use in combination with existing radio networks, such as Clansman and the American VRC-12 seriesradios. It was built according to specifications layed out by the IDF (Israel Defense Forces), but was also used by a number of NATO countries. Due to its shape and connector at the rear, the unit fits in the same space as an R-442 receiver. 
 
The image on the right shows a typical SEC-13 crypto unit. It is easily recognised by the rather large red CLEAR and green SECURE lamps on the upper part of the front panel. Immediately below the lamps is the selection of the key and the appropriate (radio) net. 

At the bottom of the front panel is the X-MODEconnector (see below), the MODE-selector and the power switch (ON/OFF). The MODE-selector is used for selection between CLEAR and SECURE and to enter the keys. More detailed images of the front panel below.
  
Close-up of the clear and secure lamps and the key setting

At present, no further information about this crypto unit is known. A slightly later version, the SEC-15, features both voice and data encryption. It is clear that they were scheduled to be replaced from 1995 onwards, by more modern equipment such as the SINCGARS radios. Nevertheless, they remained in service well into the 2000s. 

Although they were used until recently, they sometimes show up on the European surplus market, which is also where the unit shown here was found. If you have additional information about any of the Tadiran crypto devices, please contact us.