Data Encryption at Rest

Data Encryption at Rest

Encryption at Rest Overview

Encryption at rest protects stored data from unauthorized access on lost/stolen devices, unauthorized access, or physical theft. Implementation varies from full disk encryption to database and application-level encryption.

Encryption at Rest

Full Disk Encryption

FDE encrypts entire disk protecting all data with technologies like BitLocker (Windows), FileVault (macOS), and dm-crypt (Linux). FDE provides transparent protection but doesn't protect against authorized access or runtime attacks.

Database Encryption

Database encryption includes Transparent Data Encryption (TDE) encrypting files, column-level encryption for sensitive fields, and application-level encryption providing end-to-end protection. Choose based on security requirements and query functionality needs.

Cloud Storage Encryption

Cloud storage offers server-side encryption (provider managed), customer-managed keys (CMK) for control, or client-side encryption for maximum security. Understand shared responsibility and key management implications.

Key Management

Effective encryption requires secure key generation, protected key storage using HSMs or KMS, regular key rotation, secure key backup and recovery, and comprehensive key lifecycle management.

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