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My Security Checklist

Tick the devices you use and what you do online, answer a few questions, and download a checklist linked to the official guidance for each item.

Last reviewed 20 October 2026

1 Which devices do you use?

Tick all that apply.

2 What do you do online?

Tick all that apply.

3 A few quick questions

Questions for everyone are below. More appear for the devices and activities you tick.

For everyone

Are automatic updates turned on for the devices and apps you use?

Why it matters: Updates fix security weaknesses that criminals look for. Turning on automatic updates means fixes install without you having to remember.

How to do it
  1. Check that each device can still get updates. Devices that have reached 'end of support' no longer get security fixes.
  2. Open the device's settings and find the software update section.
  3. Turn on automatic updates where the option exists.
  4. Do the same for apps, in the App Store, Google Play or Microsoft Store settings.
  5. For anything without automatic updates, check for updates regularly.
  6. Before a big system upgrade, back up and free up some storage, as low space can stop updates installing.

Based on the ACSC's updates guide, checked October 2026. The device questions in this checklist show the steps for each type of device.

Does each of your important accounts have its own passphrase or password that isn't used anywhere else?

Why it matters: When one password is reused, a criminal who learns it from one website can try it on others. A different passphrase for each account stops a leak on one site spreading to the rest.

How to do it
  1. Start with the most important accounts, such as email, banking and social media.
  2. Create a passphrase of four or more random words. The ACSC's example is 'crystal onion clay pretzel' (an example only, not one to use).
  3. Use a different passphrase for every account.
  4. If a site insists on symbols, capitals or numbers, add them to the passphrase.
  5. A password manager can create and store a different password for each account, so only one master password has to be remembered.

Based on the ACSC's passphrase guidance, checked October 2026. Menus can change; the official page has the latest details.

Is multi-factor authentication turned on for your main email account?

Why it matters: Multi-factor authentication (MFA) asks for a second check, such as a code from an app, as well as the password. The ACSC lists email first because someone who gets into an email account can reset the passwords of other accounts.

How to do it
  1. Sign in to the email account and open its security settings.
  2. Look for multi-factor authentication, two-factor authentication or 2-step verification, and turn it on.
  3. If using an authenticator app, download the app first, then scan the QR code shown in the account settings.
  4. Enter the six-digit code from the app to finish setting up.
  5. From then on, signing in on a new device asks for a code or approval as well as the password.

Based on the ACSC's multi-factor authentication guide, checked October 2026. Each email provider's help pages have the exact menu names.

Are your important photos and documents backed up, ideally automatically?

Why it matters: A backup is a separate copy of your photos and documents. If a device is lost, broken or locked by ransomware, the backup lets you get them back.

How to do it
  1. Decide what matters most: photos, documents, messages, or the whole device.
  2. Choose where the copies go: a cloud service, an external drive, or both.
  3. Turn on automatic backup in the device or app settings where it's offered.
  4. Disconnect an external backup drive when it isn't in use, so malware on the computer can't reach it.
  5. Every so often, try restoring a file to check the backup works.

Based on the ACSC's backups guidance, checked October 2026. The device questions in this checklist show the steps for each type of device.

Do you keep one-time codes to yourself, even when someone claiming to be from your bank or another organisation asks for them?

Why it matters: A one-time code is often the last thing standing between a scammer and your account or money. Scamwatch notes that calls and texts can be made to look like they come from a bank.

How to do it
  1. Don't share the code with anyone who contacts you, even if they say they're from a trusted organisation.
  2. Hang up or stop replying.
  3. Find the organisation's contact details yourself, on its official website or app.
  4. Contact it that way to check whether the request was real.

Based on Scamwatch's phishing guidance, checked October 2026. Menus can change; the official page has the latest details.

Your checklist

Answer the questions above. Your checklist updates as you go.

General information based on official guidance, not advice about your situation.

Sources