Verifying the identity of a user, process, or device, often as a prerequisite to allowing access to resources in an information system.
SOURCE: SP 800-53; SP 800-53A; SP 800-27; FIPS 200; SP 800-30
The process of establishing confidence of authenticity.
SOURCE: FIPS 201
Encompasses identity verification, message origin authentication, and message content authentication.
SOURCE: FIPS 190
A process that establishes the origin of information or determines an entity’s identity.
SOURCE: SP 800-21
The process of verifying the identity or other attributes claimed by or assumed of an entity (user, process, or device), or to verify the source and integrity of data.
The process of establishing confidence in the identity of users or information systems.
SOURCE: SP 800-63