ASP.NET Core Authentication & Security

Build ASP.NET Core Security Systems You Can Trust

Your app works. Users authenticate. Endpoints are protected.

But is it truly secure?

ASP.NET Core Authentication & Security takes you beyond basic implementation into real-world, production-ready security design. This book shows you not just how authentication works-but how to build systems that hold up under real conditions.

• How authentication and authorization actually behave in ASP.NET Core

• Designing secure Identity systems and managing users correctly

• Building and validating JWT-based authentication

• Creating robust token systems with refresh, rotation, and revocation

• Moving beyond roles into claims-based and policy-based authorization

• Implementing OAuth 2.0, OpenID Connect, and external providers

• Securing APIs and protecting against real-world vulnerabilities

• Preparing applications for production security and deployment

For developers who already know ASP.NET Core fundamentals and want to move from "it works" to it's secure and production-ready.

This is not a setup guide. It's a structured progression from basic authentication to complete security system design.

You'll learn how to:

• Think in terms of trust, not just implementation

• Identify weaknesses before they become risks

• Build scalable, secure systems across APIs and services

Stop guessing about security. Start designing it with confidence.