Protecting Devices with Screen Locks
Launch library · evergreen read

A screen lock is one of the simplest security measures available, yet it remains genuinely effective, since it prevents casual access to a device that is lost, briefly unattended or picked up by someone else in a shared space. This single setting prevents the vast majority of casual, opportunistic access.
Choosing a strong PIN or passphrase rather than an easily guessed sequence, and using biometric options such as fingerprint or face recognition where available, balances everyday convenience with genuine, meaningful security in practice. Neither option alone is perfect on its own, but together they cover most situations.
Setting a reasonably short auto-lock timeout, rather than leaving a device unlocked for extended periods, reduces the window during which an unattended device could genuinely be accessed by someone standing nearby. A short timeout feels mildly inconvenient at first but quickly becomes second nature routine.
Ensuring every device, including tablets and laptops used regularly, has a screen lock enabled, rather than only the primary phone, closes a gap that is genuinely easy to overlook for less frequently used devices. Checking this across every device only takes a few spare minutes.