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Authenticity is a property achieved through cryptographic methods of being genuine and being able to be verified and trusted, resulting in confidence in the validity of a transmission, information or a message, or sender of information or a message. In simpler terms, authenticity refers to the proven fact that something is legitimate or real.

Related Terms: Integrity, Non-repudiation

Source: CNSSI 4009, NIST SP 800-53 Rev 4

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