This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. Web Authentication Best Practices 2026: JWT, OAuth 2.1, Passkeys Getting authentication wrong is the fastest way to compromise your entire application. In 2026, the auth landscape has matured significantly — passkeys (WebAuthn) are gaining traction, OAuth 2.1 is clarifying long-standing ambiguities, and JWT best practices have crystallized. This guide covers the patterns that protect production applications, with code examples in Node.js and Python.…