As nouns the difference between authenticity and nonrepudiation
is that authenticity
is the quality of being genuine or not corrupted from the original while nonrepudiation
is (legal) assurance that a contract cannot later be denied by either of the parties involved.
The quality of being genuine or not corrupted from the original.
Truthfulness of origins, attributions, commitments, sincerity, and intentions.
- I hereby certify the authenticity of this copy.
(obsolete) The quality of being authentic (of established authority).
- The authenticity of this painting is questionable.
* (quality of being genuine) genuineness
* (quality of not being genuine) phoniness; forgery; fakeness; bogosity
(legal) Assurance that a contract cannot later be denied by either of the parties involved.
(telecommunication) Assurance that the claimed sender or recipient is in fact the party who sent or received a given message.