JSON Web Tokens — stateless authentication with signed claims, refresh tokens, and common security pitfalls.
Five passes over the same idea, each from a different angle. Do them in order, or jump to whichever you need.
JWTs encode claims in a signed, self-contained token. They enable stateless authentication across distributed services. Key concepts: header/payload/signature structure, RS256 vs HS256, token expiration, refresh token rotation, token revocation strategies, and common vulnerabilities (none algorithm, JWT confusion).
