JWT Best Practices for Authentication

JWTs enable stateless authentication. Here's how to implement them securely.

Best Practices#

Token Security:
✓ Use strong, unique secrets
✓ Short access token expiry (15m)
✓ Store refresh tokens securely
✓ Implement token rotation

Storage:
✓ httpOnly cookies for refresh tokens
✓ Memory for access tokens
✓ Never localStorage for tokens
✓ Use secure cookie flags

Validation:
✓ Verify signature
✓ Check expiration
✓ Validate issuer and audience
✓ Use explicit algorithm

Revocation:
✓ Implement token blocklist
✓ Store refresh tokens in DB
✓ Support forced logout
✓ Handle token rotation

JWTs enable scalable authentication when implemented securely. Use short-lived access tokens with refresh token rotation, store tokens appropriately, and implement proper revocation. Never store sensitive data in tokens and always validate on the server side.

JWT Best Practices for Authentication

JWT Structure#

Token Generation#

Token Verification#

Refresh Token Flow#

Client-Side Token Management#

Security Considerations#

Best Practices#

Conclusion#

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