Explore the challenges and solutions for implementing scalable authorization with Keycloak in this 30-minute conference talk by Yoshiyuki Tabata from Hitachi, Ltd. Discover the growing importance of authorization in security considerations, as highlighted by the OWASP API Security Top 10 2023. Learn how to overcome the limitations of developing authorization from scratch and the benefits of introducing an authorization service. Delve into Keycloak's capabilities as an IAM OSS with OAuth2 authorization server features, enabling centralized management of authentication and authorization data. Gain insights on implementing scalable authorization using Keycloak, combining it with OPA to avoid single points of failure and improve performance. Explore the potential of integrating CockroachDB to create an authentication and authorization solution resilient to regional failures and suitable for multi-cloud environments.