<ul><li>Client assertions is a method of client authentication which can be used in OpenID Connect.</li><li>This approach enhances security by using signed tokens (JWTs) to authenticate clients during the token request process or the OAuth PAR request.</li><li>In ASP.NET Core, client assertions is not supported per default, a small implementation is required.</li><li>The application uses Microsoft Entra ID as the OpenID Connect server and the identity provider.</li></ul>

Use client assertions in OpenID Connect and ASP.NET Core

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