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The corroboration that the source of data received is as claimed.
See also non-repudiation and peer entity authentication service
CNSSI 4009-2015 IETF RFC 4949 Ver 2
The verification that the source of data received is as claimed.
NIST SP 800-33
Corroborating that the source of the data is as claimed.
NIST SP 800-57 Part 2 under Data origin authentication