WALBURN FAMILY
KG-81, KG-94/A, KG-95-/1/2/R, KG-194/A

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: The KG-81 is a general purpose key generator and was used to encrypt and decrypt data on high speed trunk circuits between tactical communications switching centers. It is capable of full duplex encryption and decryption and operates at speeds of 9.6 kbps to  20 Mbps. It is rack mounted using the HNF-81-1/2,

KG-81 photo by Ralph Simpson
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.
 
kg-94_lg.gif
KG-94 equipment. (Photo courtesy of U.S.N.)

KG-94A: Is an environmentally repackaged, ruggedized version of the KG-94 that supports the
Marine Corps unit level circuit switches (SB-3865) and the Digital Wideband Transmission
System(DWTS).

KG-194: Is a less costly version of the KG-94 that incorporates a remote keying capability and
implements FIREFLY technology. The KG-194 is used for digital and voice bulk encryption at major
communications stations.

KG-194A: Is a less costly ruggedized version of the KG-194. It satisfies the same basic
requirements as the KG-94A, incorporates a remote keying capability, and implements FIREFLY
technology.

KG-95: Is a general-purpose, high-speed, full-duplex, fixed-plant, key-generating encryption device
used for video, data links, missile test range communications. There are three KG-95 equipment configurations. The KG-95-1 is a general purpose version of the KG-95, capable of operating at any data rate between 10 and 50 Mbps. It is compatible with the KG-81, KG-94/94A, 194/194A over their common data rates and when using traditional key. The KG-95-2 operates only at the fixed DS-3 data rate of 44.736 Mbps. It is fully compliant with ANSI T1.102-1987 for DS-3 transmission and reception. The KG-95R is two KG-95-2s in a dual frame. The frame provides for hot spare capability. Other capabilities include remote operation, remote status check, and remote over-the-air rekey exchange, in addition to new key management techniques and a fiber optics interface. The KG-95R is a composite of two KG-95-2s in a redundant configuration.

The KG-95 configurations have a MIL-STD 118/114 interface. All three equipment configurations are capable of operating form traditional, punched paper key or Remote Rekey Keying (RRK) material. Traditional key may be loaded via a KOI-18, KYK-13, KYK-15, or Data Transfer Device. Remote Rekey Keying (RRK) material is loaded via a KSD-64 or the Data Transfer Device and offers the user a one-year crypto period. When using RRK material, the operator must instruct the KG-95 to
perform a change key operation once every twenty-four hour period. The daily operations required under traditional key and RRK material need to be initiated at one end of the link through the equipment's front panel or rear panel remote command lines. During traditional keying traffic, down time for a change key command is approximately 500 milliseconds. The down time during RRK is 30
seconds. The KG-95-1 operates at 10-50 Mbps. The KG-95R operates at the DS-3
rate of 44.376 Mbs.

These systems are approved for use at all classification levels. The manufacturer is Motorola Secure Telecommunications, Scottsdale, Arizona. Cost will depend on the size of the production run. Unit cost of previous production run was $7,950 for a KG-95-2 and $16,000 for KG-95R.

KIV-19: Is a miniaturized KG-194 that is functionally equivalent and interoperable with the KG-194
and KG-194A. The KIV-19 is not intended to replace the KG-194 and KG-194A but to fill new
requirements and unique backfit requirements that have strict size and weight constraints. The
KIV-19 is certified to secure all classification levels and categories. It is an UNCLASSIFIED
controlled cryptographic item (CCI) when unkeyed. When keyed, the equipment carries a
classification equal to that of the key installed.

HNF-81-1: Is approved for all levels of classified traffic and is designed to have one or two KG-81,
KG-94, or KG-194 cryptographic devices. The terminal blocks in the rear of the HNF-81-1 provide
connections between the input or output cabling and the connectors.

HNF-81-2: Is approved only for the transmission of unclassified or previously encrypted traffic
unless it is transmitting bypassed information with prior approval of National Security Agency(NSA).
The HNF-81-2 is mechanically similar to the HNF-81-1 except the terminal blocks in the rear of the
frame are mounted on printed wiring boards giving the user cryptographic bypass ability.
 
 

walburn_cabinet.jpg

A Walburn HNF-81-1/TSEC dual bay Digital Crypto graphic controller housing cabinet. It is used for the mounting and installation of the KG series Digital Crypto graphic controllers. (Photo courtesy of  E-bay seller).

CHARACTERISTICS

PHYSICAL
 

EQUIPMENT
HEIGHT (in)
WIDTH (in)
DEPT (in)
WEIGHT (lb)
DATA RATE 
KG-81 (mod 6) 5.7   6.1  18.5  22.0  9.6 Kbps to 20 Mbps
KG-94/194  5.7  6.1  19.0  16.1  9.6 Kbps to 13 Mbps
KG-94A/194A 5.2  14.0  10.2  16.7 9.6 Kbps to 13 Mbps
KG-95-1  4.0  17.1  20.5  20.0  10 to 50 Mbps
KG-95-2  4.0  17.1  20.5  20.0  44.736 Mbps
 KG-95R  8.7  19.0  23.5  58.0  44.736 Mbps
HNF-81-1  9.0  19.0  22.0  27.0  N/A
HNF-81-2  9.0 19.0 22.0 27.0  N/A

POWER / ENVIRONMENT / MTBF

KG-81
     Power: 28 Volts DC (Vdc)
     Environmental: Ground Mobile and/or Sheltered
     MTBF: 10,000 hours

KG-94
     Power: 24/48 Vdc Nominal, 23 W
     Environment: Ground Mobile and/or Sheltered
     MTBF: Specification is 10,000 hours @ 25°C; 39,000 hours demonstrated

KG-94A
     Power: 24/48 Vdc Nominal, 23 W
     Environment: Tactical Mobile and/or Sheltered
     MTBF: Specification is 10,000 hours @ 25°C; 39,000 hours demonstrated

KG-194
     Power: 24/48 Vdc Nominal, 30 W
     Environment: Ground Mobile and/or Sheltered
     MTBF: Specification is 10,000 hours @ 25°C; 18,963 hours demonstrated

KG-194A
     Power: 24/48 Vdc Nominal, 30 W
     Environment: Tactical Mobile and/or Sheltered
     MTBF: Specification is 10,000 hours @ 25°C; 18,963 hours demonstrated

KG-95-1
     Power: Operating Source: 19 to 56 Vdc
     Environment: Fixed Plant
     Operating Temperature: 0°C to 55°C
     Storage Temperature: -20°C to 70°C
     Operating Altitude: 15,000 feet
     Storage Altitude: 40,000 feet
     MTBF: 15,000 hours

KG-95-2
     Power: Operating Source: 19 to 56 Vdc
     Maximum Power Consumption: 50 W
     Environment: Fixed Plant
     Operating Temperature: 0°C to 55°C
     Storage Temperature: -20°C to 70°C
     Operating Altitude: 15,000 feet
     Storage Altitude: 40,000 feet
     MTBF: 15,000 hours

KG-95R
     Power: Operating Source: 19 to 56 Vdc
     Maximum Power Consumption: 112 W
     Environment: Fixed Plant
     Operating Temperature: 0°C to 55°C
     Storage Temperature: -20°C to 70°C
     Operating Altitude: 15,000 feet
     Storage Altitude: 40,000 feet
     MTBF: 15,000 hours
 

UNIT PRICES:

KG-81 No longer produced
KG-94 No longer produced
KG-194/194A No longer produced
KG-95 No longer produced

The authorized vendor for this product is Group Technologies Corporation, located in Florida. While they were being produced, the cost for the KG-94: $2,001, KG-94A: $1,991, KG-94 conversion kit to 194: $1,170 and KG-94A conversion kit to 194A:$1,170.



References:

1)  US Navy COMSEC web page:  https://infosec.navy.mil/TEST/PRODUCTS/CRYPTO
2) http://www.ohioscan.com/crypto.txt
3) Ralph Simpson <ralphenator(at)gmail.com>

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Apr 6/12