JWT Authentication in ASP.NET Core Web API (Part 1) | Token-Based Authentication Explained

JWT Authentication in ASP.NET Core Web API (Part 1) – Learn token-based authentication, JWT structure (Header, Payload, Signature), and the request flow used in real Web APIs. This video builds the foundation before we implement Access/Refresh tokens, Auth Server, and Resource Servers. In this video, we begin a complete, real-world series on JWT Authentication in ASP.NET Core Web API, starting from the fundamentals. Modern Web APIs serve multiple clients (web apps, mobile apps, desktop apps, microservices). That’s why token-based authentication is preferred over traditional session-based approaches for APIs. In Part 1, you will understand why JWT (JSON Web Token) is needed, how it works internally, and how the browser/client communicates securely with a stateless API using JWT. What you will learn in this video: Why authentication and authorization are mandatory for Web APIs What JWT authentication is and why it is widely used How token-based authentication works in real applications Structure of a JWT (Header, Payload, Signature) Authentication vs Authorization (clear difference) Why APIs should be stateless and how JWT supports stateless security High-level flow of JWT authentication in ASP.NET Core Web API This video focuses on conceptual clarity before implementation. In upcoming parts, we will build a production-ready authentication system using: ASP.NET Core Web API JWT Access Tokens and Refresh Tokens Authentication Server (Token Issuer) Resource Servers (Protected APIs) Role-based and policy-based authorization Claims-based authorization + JWT Bearer authentication Connect with Us for Live Training: 📞 Contact Number: +91 7021801173 💬 WhatsApp: +91 7021801173 📧 Email: info@dotnettutorials.net 📢 Telegram Group: https://telegram.me/dotnettutorials 🌍 Website: https://dotnettutorials.net/ Follow & Subscribe for More .NET Tutorials: 📺 YouTube Playlists:    / @dotnettutorials   👥 Facebook Group:   / 501905403704561   📘 Facebook Page:   / tutorialsdotnet   💼 LinkedIn Group:   / 14539101   🏢 LinkedIn Company Page:   / dot-net-tutorials   #JWTAuthentication #AspNetCoreWebAPI #TokenBasedAuthentication #JsonWebToken #JwtBearer #Authorization #Authentication #DotNet #CSharp #WebAPISecurity #ClaimsBasedAuth #RoleBasedAuthorization #Microservices #DotNetTutorials #AspNetCore