KG-84

The KG-84A and KG-84C are encryption devices developed by the U.S. National Security Agency (NSA) to ensure secure transmission of digital data. The KG-84C is a Dedicated Loop Encryption Device (DLED), and both the KG-84A/C are General-Purpose Telegraph Encryption Equipment (GPTEE). The KG-84A is primarily used for point-to-point encrypted communications via landline, microwave, and satellite systems. The KG-84C is an outgrowth of the U.S. Navy high frequency (HF) communications program and supports these needs. The KG-84A and KG-84C are devices that operate in simplex, half-duplex, or full-duplex modes. The KG-84C contains all of the KG-84 and KG-84A modes, plus a variable update counter, improved HF performance, synchronous out-of-sync detection, asynchronous cipher text, plain text, bypass, and European TELEX protocol. The KG-84 (A/C) is certified to handle data at all levels of security. The KG-84 (A/C) is a Controlled Cryptographic Item (CCI) and is unclassified when unkeyed. Keyed KG-84 equipment assumes the classification level equal to that of the keying material used.

Contents

1 Characteristics 1.1 KG-84 A/C physical characteristics 1.2 Data rate 1.3 Power 1.4 Operating temperature 1.5 MTBF 2 External links

Characteristics

KG-84 A/C physical characteristics

• Height 7.8 in (198 mm)
• Width 7.5 in (191 mm)
• Depth 15 in (381 mm)
• Weight 23 lb (10 kg)

Data rate

• KG-84 Up to 64 kbit/s synchronous and 96 Mbit/s asynchronous
• KG-84A 256 kbit/s

Power

• 24 V dc, 15 W
• 115 V ac
• 220 V ac

Operating temperature

0 to 55 °C

MTBF

69,000 hours

External links

• More info on KG-84; see also [1].
• Information

See also: KG-84, 5-UCO, BID 770, Bazeries cylinder, C-52, CD-57, Classified, Communications satellite