Unencrypted PostgreSQL backups expose every credential, payment detail, and personal record. When backups drift to cloud storage, external drives, or off‑site sites, misconfigured permissions or insider access can leak data. Encrypting files turns them into unreadable blobs, protecting assets even if storage is compromised.

Regulators now mandate backup encryption. GDPR requires personal data to be protected, HIPAA demands encrypted healthcare backups, PCI DSS insists on cardholder data encryption, SOC 2 lists encryption as a key control, and SOX covers financial data protection. Early adoption smooths future compliance shifts.

Common tools include GPG for symmetric or asymmetric encryption, OpenSSL for quick password‑based protection, and Age for a leaner interface. Managed services like Databasus automate AES‑256‑GCM encryption, key rotation, and integrity checks, eliminating manual scripting and key‑storage headaches.

Key management is the linchpin. Store keys in a dedicated secrets manager such as HashiCorp Vault, AWS Secrets Manager, or Azure Key Vault, and consider HSMs for top‑tier protection. Rotate keys regularly, keep offline backups, and document procedures so no single person holds the entire recovery chain.