A unique identifier of an object or person.
— Computer ScienceProof or evidence that supports an identity claim.
— Computer Science1. The process of determining the friendly or hostile character of an unknown detected contact. 2. In arms control, the process of determining which nation is responsible for the detected violations of any arms control measure. 3. In ground combat operations, discrimination between recognizable objects as being friendly or enemy, or the name that belongs to the object as a member of a class. Also called ID.
— USA Army