Access Token vs Refresh Token Explained Clearly (JWT Authentication in தமிழ் ) | Part 1

In this video, we clearly explain JWT Authentication in Tamil and understand the difference between Access Token and Refresh Token. You will learn: • What is Authentication? • What is JWT (JSON Web Token)? • Header, Payload, and Signature explained • Why JWT can be decoded but still secure • Difference between Access Token and Refresh Token • Why modern applications use both This is Part 1 of our complete authentication series using Express.js and Node.js. In the next video, we will implement Signup, Login, Refresh Token, Protected Routes, and Logout step by step. Perfect for backend beginners, MERN stack developers, and interview preparation. Stay tuned for Part 2 where we build the full authentication system. Subscribe for more programming tutorials. #JWT #Authentication #AccessToken #RefreshToken #ExpressJS #NodeJS #BackendDevelopment #MERNStack #WebSecurity #JavaScript #TamilProgramming #JWTAuthentication #CodingTutorial