The KUTA family includes the KG-66/66A and KGR-66 devices and NOBLEMAN refers to the KGV-68. These devices, along with the KGR-68 and KGV-68B, are used to secure weapon systems, aircraft telemetry, and data link encryption applications at test ranges. Additionally, with prior National Security Agency (NSA) approval, KUTA/NOBLEMAN units can be used for remotely staffed and unstaffed, high risk, data link encryption applications on a case-by-case basis.

The KGR-66 is a decryptor used in or with ground station receivers in telemetry systems. It consists of a communications security (COMSEC) assembly (KGV-66), which is removable from the HNF-66 housing unit. It is designed to be used in a fixed plant environment. The KGR-66 (KUTA) nomenclature has been changed to KGR-68, which has no specific designator assigned to it. Each KGR-68 contains an embedded KGV-68 and has the same form, fit, and function as the KGR-66. Even though the nomenclature has been changed, for accountability purposes, the Navy Key Distribution System (NKDS) still reflects KGR-66s as well as KGR-68s in its inventory.

The KUTA/NOBLEMAN family is interoperable with the KG-67, KG-135, and SO-66 (Mode B only), and accepts key via the AN/CYZ-10, KOI-18, KYK-13, or KYX-15A. It is certified to encrypt/decrypt up to SECRET; however, two devices can be used in an upgrade configuration to achieve a higher level of classification. KUTA/NOBLEMAN units are UNCLASSIFIED controlled cryptographic item (CCI) when unkeyed. When keyed, their classification equals that of the key installed.

CHARACTERISTICS

Physical Characteristics
Height (in) - 3.5
Width (in) - 19.0
Depth (in) - 18.0
Weight - 15 lb

Data Rate:10 Kbps to 10 Mbps

Power:

Operating Voltage: 105 to 132 Vac
Operating Frequency: 55 to 440 Hz
Wattage: 20 W (maximum)

Environment:

Operating Temperature: 0°C to 50°C

MTBF: 27,000 hours at 50°C

Source: US Navy COMSEC web page. https://infosec.navy.mil/TEST/PRODUCTS/CRYPTO