What task does the Keycloak system perform and in what scenarios is it used?

Keycloak is an open-source identity and access management system. It provides ready-made solutions for Single Sign-On, user management, roles, and access rights.

Main use cases of Keycloak:

• Centralized authentication for multiple applications.
• Support for various security protocols (OAuth2, OpenID Connect, SAML).
• User and group management with the possibility of integration with LDAP or Active Directory.
• Ensuring security for REST APIs and web applications.

For example, if a company has several web services, Keycloak allows users to log in once and access all services without re-authentication.