Understand How JWT Works in 2 minutes
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Are you curious about how applications handle secure authentication and authorization without constant server checks? In this video, we break down everything you need to know about JWT (JSON Web Token) in the simplest terms. Think of JWT as a "special letter" that proves you're allowed to access specific resources. But how does it work? What’s inside it? And why is it so widely used?
Here’s what we’ll cover in this detailed walkthrough:
👉 What is JWT? – Understand the purpose of JSON Web Tokens and how they facilitate secure data sharing between systems.
👉 JWT Structure – Learn about the three components of a JWT:
Header: Specifies the type of token and signing algorithm.
Payload: Contains claims or user information (like roles and permissions).
Signature: Ensures the token hasn’t been tampered with.
👉 How JWT Works – Step-by-step explanation of the JWT lifecycle:
Token Creation: How the server generates a signed JWT after user login.
Token Storage: Where JWTs are typically stored (local storage or cookies) and the pros and cons of each.
Token Usage: How clients send the token in request headers for authentication.
Token Verification: How servers validate tokens, check claims, and ensure security.
👉 Key Use Cases of JWT – Discover how JWT is used for authentication, authorization, and secure information exchange.
We’ll also explain key concepts like:
✅ Why JWT is base64-encoded but not encrypted.
✅ How the signature ensures data integrity.
✅ Why mastering JWT is essential for developers working with modern web apps and APIs.
This video is perfect for beginners who want a practical and easy-to-understand introduction to JWT. Whether you’re diving into web development, API security, or building full-stack applications, this guide will equip you with the foundational knowledge to start implementing JWT effectively.
