Exfiltration

Exfiltration, an antonym for infiltration, may stand for:
 * The same as extraction (military) (also exfil)
 * A method for managing stormwater runoff
 * An air escape from a building, see ventilation (architecture)
 * Used by some computer security practitioners in place of 'data theft', to mean an unauthorized release of data from within a computer system or network.