The accounts guide covers the basics: a password manager, two-step verification and backup codes. Do it first. This guide is for people who expect someone to try hard to get into their accounts. It replaces codes that can be phished with keys that can't, and turns on the strictest settings Google, Apple and Meta offer. The strongest settings also make it easier to lock yourself out, so read Plan how you will get back in before you change anything.

Essential

Mark as done

A fake login page can ask for your password and the code from an SMS or an authenticator app, and pass both to the real site at once. A security key or passkey doesn't work on a site it wasn't registered for, so it can't be phished this way. CISA advises people who are targeted to use them, and not to use SMS: someone with access to the phone network can read SMS codes, and a number can be moved to another SIM.

All accounts

  1. Add a security key or passkey to your most important accounts first: email, Google or Apple, your password manager, social media. For passkey basics, see Switch to passkeys where they are offered.
  2. CISA calls hardware security keys the most effective option and passkeys an acceptable alternative.
  3. Once a key or passkey works, remove SMS as a second step where the service lets you: see Remove SMS where you can.

If you still have a password, a fake site can say your passkey failed and ask for the password instead: don't type it. A passkey saved in a password manager can be used by anyone who gets into that password manager. Keys protect new sign-ins; Google notes that a device that stays signed in may not ask for the key again, so someone holding your unlocked phone is already past it.

Essential

Mark as done

A security key is a small device that you plug in or hold against your phone. Get two and register both: carry one and keep the other in a safe place. Apple requires at least two, and Google recommends a backup key. Before you buy, check that the connector fits your devices: Apple says keys with both NFC and USB-C work with most of its devices. To store a passkey on the key, Google needs one that supports FIDO2.

Google

  1. In your Google Account, open Security & sign-in. Under How you sign in to Google, select Passkeys and security keys, then Create a passkey, and add your keys.
  2. A new key may only work for sign-in after 7 days. If you already have a trusted key or passkey, you may be able to approve it sooner. Add keys well before you travel.

Apple

  1. You need iOS 16.3 or macOS Ventura 13.2 or later on every device signed in to your Apple Account.
  2. On iPhone, open Settings, tap your name, then Sign-in & Security → Two-Factor Authentication → Security Keys → Add Security Keys. On a Mac: System Settings, your name, Sign-in & Security → Two-Factor Authentication, then Set Up next to Security Keys.
  3. Setup signs you out of devices you haven't used for 90 days. Older devices that can't be updated can't sign in again.
  4. Afterwards, only a key or a trusted Apple device signs you in. Apple warns that if you lose all your keys and trusted devices, you could be locked out permanently.

Microsoft

  1. Open Advanced Security Options at account.live.com/proofs/manage, choose Add a new way to sign in or verify, then Face, Fingerprint, PIN, or Security Key, and save the passkey to Security key.

Facebook

  1. Open Settings & Privacy → Settings, then Accounts Center → Password and security or Meta Account → Login and security (you may see either). Then choose Two-factor authentication, then Security key (or Security keys), and Register security key.
  2. Facebook says a key doesn't replace your password, and asks you to keep a second two-factor method as a backup.

A key protects only the accounts you add it to, and only the sign-ins that ask for it.

Essential

Mark as done

The stronger the account, the harder the way back in. Prepare before you need it.

All accounts

  1. Keep the second key, printed backup codes (a Google account in Advanced Protection has none) and any recovery key away from your phone, in more than one place: Apple suggests one at home and one at work.
  2. Don't keep an Apple recovery key in Apple Passwords, Notes, iCloud Drive or Photos: if you are locked out, you can't open them. Print it or write it down.
  3. Add a Google recovery contact: see Make sure you can get back in. It can be used only 7 days after they accept.
  4. Know the waits. If you lose your keys, Google takes a few days to check it's you. Apple's account recovery can take several days or longer, and using another signed-in Apple device during the wait cancels it. If you set up a recovery key or security keys, don't count on account recovery to get you back in.
  5. If a signed-in phone or computer is lost, stolen or taken from you, treat the accounts on it as compromised: follow If your account was hacked.

Backup codes and recovery keys are as powerful as your password: anyone who finds them can get in. Keep them as carefully as the keys.

Essential

Mark as done

Google recommends Advanced Protection for journalists, activists, campaign staff and anyone at elevated risk of targeted attacks, and CISA recommends it to Gmail users. It costs nothing.

Google

  1. Before you start, add a recovery email and phone number, turn on two-step verification, and have two security keys or passkeys ready.
  2. Go to landing.google.com/advancedprotection, select Get started and follow the instructions.
  3. What changes: every new device needs your key or passkey. Only Google apps and verified apps can reach your Google data. App passwords stop working, so some mail apps lose access. On Android, new apps install only from Google Play and preinstalled stores. Chrome may offer to send a download it can't check to Google for scanning. Recovery takes extra checks and a few days.
  4. Google recommends enrolling both your work and personal accounts.
  5. When you travel, take a key with you.

Facebook

  1. Facebook offers Advanced Protection to accounts at higher risk, including journalists and politicians. Some accounts are required to join and can't leave it.
  2. If Facebook asks you to turn it on, tap Get Started on the notice in your Feed and follow the steps. Don't ignore it: a required account that doesn't finish setup can lose access. Open the notice in the app rather than through a link in an email; real emails about it come from security@facebookmail.com.

This protects the account, not the phone: for the phone, see Turn on Advanced Protection on Android. It doesn't help against someone who already has one of your signed-in devices.

Advanced

Mark as done

If you have a public role, NCSC suggests separate accounts for work and personal life. If an account must not be linked to you, it needs its own email address, phone number, photos and contacts.

All accounts

  1. Use a separate email address and, if you can, no phone number. Both can link accounts together. With SMS two-step verification, the company has your number.
  2. Use a profile photo that you don't use anywhere else.
  3. Don't follow, like or share between your identities, and try not to have the same contacts follow both.
  4. Turn off finding you by phone number or email: see Stop being found by your phone number or email.
  5. If you use a separate number, keep paying for it. A number you give up can be given to someone else, and an account tied to it becomes harder to recover.
  6. Use a separate browser or browser profile for each identity. For stronger separation, use separate devices.

Separate accounts can still be linked: Google can add a verified phone number on an Android phone to any Google Account signed in on it, and accounts used from the same internet connection can be connected.