Short answer: stop sharing codes in chat. Use individual logins where platforms support them, and for the ones that don’t, put the TOTP secret in a shared password manager vault. Plus the offboarding step almost every team forgets.
Short answer: Settings → Privacy and Security → Two-Step Verification → Set Additional Password. Telegram’s version is a password on top of the SMS code — and the recovery email step is the one that decides whether you can ever get back in.
Short answer: codes stored inside the account they unlock, screenshotted QR codes, SMS left on as a fallback, one device with no backup, and an unprotected recovery email. Nine mistakes — and not one of them involves a hacker.
Short answer: enable 2FA at your registrar with an authenticator app, turn on registrar lock, and move the contact email off the domain itself. The registrar account sits above your email in the hierarchy — and almost nobody protects it that way.
Short answer: it depends what the biometric unlocks. Face ID opening your banking app isn’t a second factor — the server never sees it. A fingerprint unlocking a passkey is genuine 2FA. Same finger, very different security.
Short answer: Settings → Security and Privacy → Set Up Two-Factor Authentication. Twitch makes you verify a phone number first, then lets you switch to an app — and the switch is the step most people skip. Plus the stream key that 2FA doesn’t protect.
Short answer: authenticator codes work offline, with no SIM, in any time zone — TOTP runs on UTC. What breaks abroad is SMS. Here’s the 30-minute checklist to do before you fly, and what to do if your phone disappears.
Short answer: Settings → Two-Factor Authentication → Continue, then pick Authentication App over SMS. Snapchat’s recovery code is shown once and its support process is unforgiving — that one step decides whether a lost phone costs you the account.
Short answer: FIDO2 is the standard, WebAuthn is the browser API websites call, and CTAP is how your browser talks to a security key. Passkeys and security keys are what you actually hold — here’s how origin binding makes them unphishable.
Short answer: Settings → Account settings → Two-factor authentication → Enable, on desktop. Reddit supports authenticator apps only — no SMS — and its account recovery is thin enough that the backup codes really matter.