Which information security property is supported by encryption?

Sustainability is not a recognized information security property within the CIA triad (Confidentiality, Integrity, Availability).

Integrity - ensuring data has not been altered - is primarily supported by cryptographic hashing (e.g., SHA-256) and digital signatures, not encryption alone.

Confidentiality ensures that information is accessible only to those authorized to view it, and encryption is the primary technical control that enforces this property. By transforming data into ciphertext using an algorithm and key, encryption prevents unauthorized disclosure even if the data is intercepted. This is a core pillar of the CIA triad.

Availability - ensuring systems and data are accessible when needed - is supported by redundancy, failover, and uptime controls, not encryption.