Explore the latest developments in OAuth 2.1 and learn how to implement secure authorization and authentication solutions in this conference talk from NDC London 2021. Delve into the consolidation and simplification of OAuth 2.0's most commonly used features, understanding how OAuth 2.1 addresses modern web application security challenges. Gain insights into the details of OAuth 2.1 and discover development approaches for ensuring compliance in current projects. Watch as the speaker demonstrates implementation using .NET 5 and IdentityServer4, a popular open-source framework for OpenID Connect and OAuth 2.0 on ASP.NET Core.