In this session, we'll explore the power of Google Zanzibar, a globally distributed authorization system that handles permissions for Google products like Drive and YouTube. Learn how Zanzibar's relationship-based access control (ReBAC) enables flexible, scalable, and queryable access control, allowing applications to manage complex permissions models with low latency and high availability. Discover how its centralized, graph-based approach decouples authorization from application logic, offering a robust foundation for modern, distributed systems.