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KG - 27
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KG-27

Information :
Electronic Key Generator, TSEC/KG-27

The KG-27 was full duplex equipment used to encrypt tactical, multichannel communication. The unit was designed for simplicity of installation, operation, and maintenance. Within the Marine Corps, the KG-27 was used in the Terminal Set, Telephone, AN/TCC-72, which was the companion multiplexer van to the Radio Set, AN/GRC-201, and the Ground Mobile Forces (GMF) Super High Frequency (SHF) Satellite Communications Terminals, AN/TSC-85A/93A.

The KG-27 provided link security for low, medium, and high capacity Pulse Code Modulation (PCM) tactical radio relays of the Marine Amphibious Force (MAF). Since the KG-27 was a controlled telecommunication security item, it will be received through the Cryptographic Material System (CMS). It was the using units responsibility to "marry up" the KG-27 with the Terminal Set, AN/TCC-72, and the Satellite Communications Terminal, AN/TSC-85A/93A. 
 

kg27.jpg
This KG-27 example is held by the National Cryptologic Museum. (Photo by Vin Simmons)