Explore the world of Json Web Tokens (JWT) in this 48-minute conference talk from PHP UK Conference 2017. Dive into the concept of intelligent, self-contained tokens that simplify resource identification and enhance security in distributed systems. Learn about JWT's structure, claims, and common use cases. Discover how to implement and secure JWTs, compare them with OAuth, and understand their limitations. Gain insights on best practices for token creation, management, and expiration. Explore practical examples, debugging techniques, and available PHP libraries for working with JWTs.