With .NET 9.0, some interesting authentication and authorization features have been added to the platform. Let’s take an overview of them.

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NET 9 includes various enhancements for authentication and authorization, focusing on cloud-native development and performance. Key features include support for Pushed Authorization Requests (PAR) to enhance security in OAuth 2.0 and OpenID Connect environments, simplified methods for adding custom OAuth/OIDC parameters, configuration flags for Windows Authentication under HTTP.sys, and methods to serialize authentication states in Blazor Web Apps. These updates aim to simplify developers' tasks, improve security, and reduce potential bugs.

Authentication and Authorization Enhancements in .NET 9.0

Support for Pushed Authorization Requests (PAR)

Configuration Flags for Windows Authentication

Authentication State Serialization for Blazor Web Apps