Modern Backend Development Training – Decode Refresh Token: Handling Secure Sessions!

Welcome to Part 4 of the Modern Backend Development Training series! In this video, you’ll learn how to decode a refresh token, a critical step in implementing secure and scalable user authentication systems. Refresh tokens allow users to stay logged in without exposing sensitive data or re-authenticating too often.

We’ll dive into JWT (JSON Web Token) structure, securely validating and decoding refresh tokens on the server using middleware, and setting the stage for auto-renewed access sessions.

✅ What You’ll Learn in This Video:

✔️ Understanding the structure of a JWT refresh token
✔️ Installing and using jsonwebtoken to decode tokens
✔️ Creating middleware to verify and decode refresh tokens
✔️ Validating tokens against a secret or public key
✔️ Sending new access tokens securely upon refresh requests

💡 Why This Step Matters:

🔹 Enables secure and seamless user session handling
🔹 Reduces friction by auto-renewing login states without re-entry
🔹 Is foundational for building scalable, production-grade authentication systems