Ultimate Guide to Server-Side Scripting – Decode Refresh Token

Welcome to Part 4 of the Ultimate Guide to Server-Side Scripting! In this session, we dive into refresh tokens—a critical part of secure, scalable authentication systems. You’ll learn how to decode and manage refresh tokens to keep users logged in without constantly re-authenticating.

This is an essential skill for any backend developer working with JWT-based auth systems.

✅ What You’ll Learn in This Video:
✔️ What refresh tokens are and how they differ from access tokens
✔️ How to generate and decode refresh tokens using JWT
✔️ Implementing a refresh token route in Node.js + Express
✔️ Storing tokens securely (HTTP-only cookies vs. localStorage)
✔️ Best practices for token expiry, rotation, and blacklisting

💡 Why This Step Matters:
🔹 Enables seamless user sessions and secure re-authentication
🔹 Protects your app from token theft, replay attacks, and hijacking
🔹 Builds real-world skills used in login systems, dashboards, and APIs