Explore three new attacks against JSON Web Tokens (JWTs) in this 40-minute Black Hat conference talk. Delve into the vulnerabilities of JWTs and the associated Javascript Object Signing and Encryption (JOSE) standards, which have been criticized for cryptographic design flaws and unnecessary complexity. Examine the well-known "alg":"none" attack and discover how these security issues can impact web authentication, session management, and identity federation. Learn from security researcher Tom Tervoort as he presents his findings and discusses the implications for developers and security professionals working with JWT implementations.