Trust Anchor

Trust Anchor definition in Computer Security terms:

Acronym(s): None

Definition(s): An established point of trust (usually based on the authority of some person, office, or organization) from which an entity begins the validation of an authorized process or authorized (signed) package. A "trust anchor" is sometimes defined as just a public key used for different purposes (e.g., validating a certification authority (CA), validating a signed software package or key, validating the process (or person) loading the signed software or key).
Source(s): CNSSI 4009-2015

One or more trusted public keys that exist at the base of a tree of trust or as the strongest link in a chain of trust and upon which a Public Key Infrastructure is constructed in a CKMS.
Source(s): NIST SP 800-130

A CA with one or more trusted certificates containing public keys that exist at the base of a tree of trust or as the strongest link in a chain of trust and upon which a Public Key Infrastructure is constructed.