> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Atoti Security: Authentication

The [Spring Security](https://spring.io/projects/spring-security) framework provides the authentication layer in Atoti Server.
It uses dependency injection for configuration and supports custom providers for integration with existing enterprise identity systems.

<Frame>
  <img src="https://mintcdn.com/activeviam/KszPZqdDnmT6EpJc/engine/java-sdk/6.1/assets/security/authentication.png?fit=max&auto=format&n=KszPZqdDnmT6EpJc&q=85&s=cb6e96f1e473f1bd52ea6f0d425c3d8c" alt="Authentication_flow" width="699" height="335" data-path="engine/java-sdk/6.1/assets/security/authentication.png" />
</Frame>

For example, the sandbox defines some security configuration in the `CorsConfig` class.