Sign In -

An extra layer—like a code sent via SMS or generated by an app—ensures that even if a password is stolen, the account remains safe [26, 30].

A client (like your phone) requests access, the server prompts for credentials, and upon successful validation, the server returns the requested resource or a "session" token [31]. Sign in

Many platforms now use Magic Links (emailed codes) or Passkeys , which leverage device biometrics like FaceID instead of traditional typing [11, 26]. An extra layer—like a code sent via SMS

Single Sign-On (SSO) allows users to use existing accounts from Google or Apple, eliminating the need to create new passwords [12]. the account remains safe [26