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KG - 95
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KG - 95
The KG-94 and KG-194 are part of the WALBURN family of full duplex, high-speed key generators that provide encryption of digital traffic. KG-194 is essentially a KG-94 with added features. These devices provide full duplex/simplex encryption for all classification levels and are crypto graphically compatible and interpretable (within their respective data rates). Applications include microwave trunks, high speed landline circuits, video teleconferencing, and T-1 satellite channels.

The KG-94 and KG-194 are tactical versions of the KG-94A and KG-194A. The KG-194 is an upgraded version of the KG-94 design. All verions are cryptographically compatible with each other, as well as with the KG-81 and KG-95 within their respective data rates in the traditional key mode. When used in conjunction with the Interface Adapter Unit, they can be a direct replacement for the KG-27. The KG-194 and 194A are interoperable only with other KG-194(A) in the FIREFLY mode. The KG-94 and KG-194 family functions with MIL-STD 118/114, RS-422 and RS-449 standard synchronous interfaces.
Encryption and decryption takes place at speeds of 9.6 Kbps to 13 Mbps. The KG-194 and 194A generators are compatible with FIREFLY remote re-keying and can also be keyed with the KSD-64A. Traditional keying is accomplished with the KOI-18, KYK-13, KYK-15, KOK-12, and the Data Transfer Device (AN/CYZ-10) for any of the KG-94s and 194s. The KG-94 and 194 families may be used with fix plant and tactical trunk encryption devices. They are approved for use at all classification levels up to TOP SECRET. They are UNCLASSIFIED controlled cryptographic items (CCIs) when unkeyed.

KG-81: Provides full-duplex encryption of digital trunks. It is rack mounted using the HNF-81-1/2
interconnect housing frame. The KG-81 is used primarily at major communications stations for bulk
data and video encryption.

KG-94: Provides emerging low and medium tactical and nontactical digital trunk encryption. It is
rack mounted using the HNF-81-1/2 interconnect housing frame and supports the Joint Tactical
Communications program in association with Marine Corps AN/TTC-42 and AN/TRC-170 switches.

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KG-94 equipment. (Photo courtesy of U.S.N.)