2021-12-13 16:57:36 -06:00

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[[authentication]]
= Authentication
Spring Security provides comprehensive support for https://en.wikipedia.org/wiki/Authentication[authentication].
Authentication is how we verify the identity of who is trying to access a particular resource.
A common way to authenticate users is by requiring the user to enter a username and password.
Once authentication is performed we know the identity and can perform authorization.
Spring Security provides built-in support for authenticating users.
This section is dedicated to generic authentication support that applies in both Servlet and WebFlux environments.
See the sections on authentication for xref:servlet/authentication/index.adoc#servlet-authentication[Servlet] and WebFlux for details on what is supported for each stack.