A credential issued based on proof of possession and control of a token associated with a previously issued credential, so as not to duplicate the identity proofing process.
Sources:
CNSSI 4009-2015
A credential issued based on proof of possession and control of an authenticator associated with a previously issued credential, so as not to duplicate the identity proofing process.
Sources:
NIST SP 800-63-3
under Derived Credential