Flight key

A flight key is a special key used by drone pilots to authenticate themselves within the computer system. Before a pilot can take control of a drone, he has to insert the flight key into a specific slot in the console and use a biometric fingerprint scanner to provide his credentials.

During Day 9, Lieutenant Chris Tanner's drone was hacked and used to attack an Army convoy in Afghanistan. Tanner's flight key was part of the evidence and, according to Captain Greg Denovo, it confirmed that the attack indeed came from Tanner's console.

Later, Tanner was taken to the United States Embassy in London, along with the flight key, for further investigation.