The US Air Force has received the first KIV-77 Mode 4/5 crypto applique computers, as part of a five-year indefinite delivery-indefinite quantity agreement signed with Raytheon.

The computers will support the Identification Friend or Foe (IFF) equipment of the air force.

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It will provide aircraft with the latest technology to enhance air, land and surface combat-identification capability.

The KIV-77 is Type 1 certified by the National Security Agency and will provide information assurance for both legacy Mode 4 and new Mode 5 IFF equipment.

The Mode 5 IFF is the next-generation encrypted data link between interrogators and transponders used to confirm an aircraft is friendly.

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The IFF is a cryptographic identification system designed for command and control.

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The system enables military, and national interrogation systems to distinguish friendly aircraft, vehicles, or forces, and to determine their bearing and range from the interrogator.