In the good old days, your users would log into a web app with a username and password. But now people expect an alphabet soup of SSO, 2FA, OAuth, OIDC, SAML, FIDO2, OTP... What do they all mean - and why do they matter? Why is central authentication useful? What does two-factor authentication really protect us from, and what's still wide open? Learn how to keep your users safe as we discuss the good, the bad and the ugly of modern authentication mechanisms for the Web.

This talk is aimed at anyone passingly familiar with web development, with an interest in security, or who simply wants to know what’s really going on when you ‘sign in with Google’.