Securing Production Backends: JWT, OAuth2, and OWASP Defense

Security must be an integral part of application architecture from day one. Here are critical security measures every production backend requires.

1. Secure Authentication with Short-Lived JWTs

Never store sensitive payload data inside JWT tokens. Use short expiration times (e.g. 15 minutes) paired with secure httpOnly refresh cookies.

2. Defending Against SQL Injection & XSS

• Always use parameterized queries or ORMs.
• Sanitize user input using HTML sanitization libraries before rendering user content.

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