The process of providing a digital signature for a set of measurements securely stored in hardware, and then having the requester validate the signature and the set of measurements.
Sources:
NIST SP 1800-19B
under Attestation
The issue of a statement, based on a decision, that fulfillment of specified requirements has been demonstrated.
Sources:
Software Supply Chain Security Guidance EO 14028
from
ISO/IEC 17000:2020