What aspect of CIA is demonstrated by verifying the sender of a document?

Verifying the sender of a document is related to the concept of authentication within the CIA triad, which stands for Confidentiality, Integrity, and Availability. Authentication is the process of ensuring that a document or message comes from a legitimate source. This means confirming the identity of the sender, which is critical in establishing trust in digital communications.

If the sender of a document can be verified, it solidifies the integrity of the information being presented. It prevents the unauthorized alteration of information and reassures the receiver that the content has not been tampered with. Essentially, authentication ensures that the integrity of the message is preserved by confirming the source is who they claim to be.

While integrity is concerned with the accuracy and reliability of information, here it’s the act of confirming the sender's identity through authentication that is being emphasized. Therefore, the verification of the sender directly relates to the principle of authentication, which plays a pivotal role in maintaining the integrity of digital communications.