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Everyone · 6 min read

Passwords, two-factor login and passkeys

Most break-ins start with a stolen or guessed password. Three habits stop almost all of them.

One password per account

Websites get hacked all the time. If you use the same password everywhere, a leak at a small web shop opens your email and bank too. Use a different password for every account — and a password manager to remember them.

Password managers

A password manager (built into your phone or browser, or a separate app like Bitwarden or 1Password) creates long random passwords and fills them in only on the real website — which also protects you from fake login pages. You remember one strong master password.

Two-factor authentication (2FA)

Turn on a second step for email, bank, social networks and cloud storage. An authenticator app or a security key is better than SMS. Remember: a stolen password alone is then not enough — unless you give away the code, which is exactly what scammers will ask for.

Passkeys — the future of login

A passkey replaces the password with your phone’s or computer’s unlock (fingerprint, face or PIN). It cannot be guessed, leaked from a website or typed into a fake page. Google, Apple, Microsoft and many banks and shops already support it — turn it on wherever it is offered.

Your email is the master key

  • Whoever controls your email can reset almost every other password
  • Protect it best: unique password, 2FA or passkey, recovery options up to date
  • Check haveibeenpwned.com to see whether your address appeared in leaks
  • Update your phone and apps — updates close holes attackers use
Key takeaways
  • A different password for every account — use a password manager.
  • Turn on 2FA or passkeys, starting with email and bank.
  • Never share a login code, whoever asks.
Try it

This week: turn on two-factor login for your main email account — it takes five minutes.

Check yourself

  1. Why is reusing a password dangerous?
  2. Someone from “the bank” asks you to read out the code you just received. What do you do?
  3. What is a passkey?

Tip: getting at least 2 answers right in the quiz above completes the lesson automatically.

This lesson is part of:Staying Safe in the Age of AI

Last reviewed: September 2026