CIA
The CIA triad — Confidentiality, Integrity, Availability — is the foundational model for information security.
Every security control ultimately maps to one or more triad pillars — encryption serves Confidentiality, hashing and digital signatures serve Integrity, and redundancy and backups serve Availability. Some extended models add non-repudiation and authenticity, but CIA remains the SY0-701 default and the lens for classifying any control or threat.
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