Cybersecurity · Beginner level

Beginner level · Module 3: Device Security · Lesson 2 of 3

Locks, Encryption and App Permissions

Protect devices that are lost or stolen and limit what apps can access.

In this lesson you will

  • Set strong screen locks and enable encryption
  • Review and limit app permissions

Key concepts

screen lockdevice encryptionfind my deviceapp permissions

The lesson

A strong screen lock (PIN of six or more digits, password or biometrics) and a short auto-lock time protect a lost phone or laptop.

Device encryption (BitLocker or Device Encryption on Windows, FileVault on Mac, on by default on modern phones with a lock) keeps data unreadable without the unlock code.

Review app permissions: a torch app does not need your contacts or location. Remove apps you no longer use, and turn on 'find my device' to locate or wipe a lost device.

Step by step

  1. Set a strong lock and short auto-lock.
  2. Check that encryption is on.
  3. Review permissions for five apps.
  4. Enable find-my-device.

Practice activity

Complete the lock, encryption and permissions part of the device checklist.

Expected result: Devices with strong locks, encryption on and unnecessary permissions removed.

Check your understanding

  1. What does device encryption protect against?

    Show answer

    Data being read from a lost or stolen device.

  2. Why review app permissions?

    Show answer

    To stop apps accessing data they do not need.

Taught live by an instructor — online or in person. Free course lessons are for self-study and do not lead to a certificate — see registration options.