The process of demonstrating that the system under consideration meets in all
respects the specification of that system.
SOURCE: FIPS 201
Confirmation (through the provision of strong, sound, objective evidence) that
requirements for a specific intended use or application have been fulfilled (e.g., a
trustworthy credential has been presented, or data or information has been
formatted in accordance with a defined set of rules, or a specific process has
demonstrated that an entity under consideration meets, in all respects, its defined
attributes or requirements).