Explore the advanced security features of ASP.NET Core 2.2 and 3.0 for web applications and APIs in this comprehensive conference talk. Delve into standards-based authentication, single sign-on, and API security, with a focus on the integration of IdentityServer4 in project templates. Learn about the core architecture, data protection, authentication interfaces, session management, external authentication, and API authentication through practical demonstrations. Gain insights into authorization techniques, ASP.NET Identity, and the Identity Server framework. Discover how to implement robust security measures in your web applications and APIs using the latest ASP.NET Core features and best practices.