This talk explores how to customize authentication and authorization for applications and platforms using Keycloak. Learn about industry standards like OpenID Connect and SAML that govern single-sign-on interactions, and discover how to tailor login screens, implement additional authentication checks, and provide appropriate information to each application. The presentation demonstrates Keycloak's capabilities for implementing security standards, offering customizations, and integrating with existing security infrastructure such as LDAP, Kerberos, and other Identity Providers. Explore recent enhancements in Keycloak's authentication features, including Passkeys support, and get insights into the latest release features and future roadmap.