Encryption at Rest: Protecting Stored Data from Breaches
How encryption at rest works, the difference between full-disk and field-level encryption, key management, and cloud provider options.
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Tags: security, encryption, storage
Encryption at Rest: Database, Disk, and File-Level Encryption Encryption in transit protects data while it moves through networks. Encryption at rest protects data that is sitting still — in a database, on disk, in a file share, in a backup. When a laptop is stolen, a hard drive decommissioned incorrectly, or a backup tape lost in transit, encryption at rest is what prevents that storage from becoming a data breach. This guide explains the three main approaches and when each is appropriate. Full-Disk Encryption Full-disk encryption (FDE) encrypts the entire storage device. Every bit written to disk is encrypted; every bit read is decrypted transparently by the OS or firmware. macOS: FileVault (AES-XTS 256-bit). Enabled via System Settings → Privacy & Security → FileVault. Windows:…
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