Secrets Management Best Practices

Best Practice: Secrets Management Best Practices

Secrets management is the discipline of storing, distributing, rotating, and auditing sensitive credentials, such as API keys, database passwords, tokens, and encryption keys. The core principle is simple: secrets should never live in source code, build logs, or shared documents, and applications should retrieve them at runtime from a dedicated, access-controlled store. It matters because leaked credentials are one of the most common causes of breaches. A single key committed to a public repository can compromise an entire environment, and proper management makes leaks rarer and less damaging. For a developer it answers "where do I put this key?" with a safe default; for a leader it directly reduces the most common breach cause. The strongest pattern is to remove standing secrets entirely, using short-lived, automatically issued credentials so there is little of lasting value to steal. Detection matters as much as prevention. Secret scanning on every commit and in CI catches the leaks that slip through, and pairing scanning with automatic revocation, so a detected key is invalidated immediately, limits the window an attacker has to use it before anyone notices.

Step-by-Step Implementation Guidance

1. Inventory where secrets currently live, including code, config files, and CI variables.
2. Move secrets into a dedicated secrets manager or vault.
3. Grant access using least privilege, scoped per service and environment.
4. Inject secrets at runtime rather than baking them into images or code.
5. Enable automatic rotation and short-lived credentials where possible.
6. Add secret scanning to pre-commit hooks and CI to catch leaks early.
7. Audit access and rotate immediately on any suspected exposure.

Common Mistakes Teams Make When Ignoring This Practice

• Committing keys and passwords directly into source control.
• Sharing a single static credential across many services.
• Printing secrets to build or application logs.
• Never rotating credentials, so old leaks stay valid indefinitely.
• Granting broad access instead of scoping secrets per service.
• Rotating secrets manually and infrequently, so a leaked credential stays valid for months.

Tools and Techniques That Support This Practice

• Dedicated managers such as HashiCorp Vault, AWS Secrets Manager, and Azure Key Vault.
• Secret scanners like gitleaks, TruffleHog, and GitHub secret scanning.
• Short-lived dynamic credentials and workload identity federation.
• Pre-commit hooks to block secrets before they are committed.
• Envelope encryption and dedicated key management services for encryption keys.
• Workload identity and OIDC federation to grant cloud access without any stored long-lived key.

How This Practice Applies to Different Migration Types

• Cloud Migration: Replace embedded credentials with the cloud provider's secrets manager and workload identity.
• Database Migration: Rotate database credentials during cutover and store them in a vault.
• SaaS Migration: Manage vendor API keys centrally and scope them to the integrating service.
• Codebase Migration: Scan the old and new codebases for hardcoded secrets and remove them from history.

Checklist

• Inventoried where secrets currently live
• Moved secrets into a dedicated vault
• Scoped access with least privilege
• Injected secrets at runtime, not in images
• Enabled rotation or short-lived credentials
• Added secret scanning to commits and CI
• Defined a rotation procedure for suspected exposure