Which file action implements the principle of confidentiality from the CIA triad? Encryption Compression Backup Hash

The principle of confidentiality from the CIA triad is implemented by the file action "Encryption".

Here's a step-by-step explanation:

1. The CIA triad stands for Confidentiality, Integrity, and Availability. It's a model designed to guide policies for information security within an organization.

2. Confidentiality involves measures used to ensure that sensitive information is accessible only to authorized individuals.

3. Encryption is a method where information is encoded and can only be accessed or decrypted by a user with the correct encryption key.

4. Therefore, encryption is the file action that implements the principle of confidentiality from the CIA triad.

Compression, Backup, and Hash do not directly implement the principle of confidentiality. Compression is used to reduce the size of the file, Backup is used for creating copies of data to prevent data loss, and Hash is used to verify the integrity of data.