Discover our blogs

Aerospace | Cranfield University


Agrifood | Cranfield University


Alumni | Cranfield University


Careers | Cranfield University


Careers | Cranfield University

Defence and Security

Design | Cranfield University


Energy and Power | Cranfield University

Energy and Sustainability

Environment | Cranfield University


Forensics | Cranfield University


Libraries | Cranfield University


Libraries | Cranfield University

Manufacturing and Materials

Libraries | Cranfield University

School of Management

Libraries | Cranfield University

Transport Systems

Water | Cranfield University


Homepage / Locking Your Device

Locking Your Device



How secure is your device? Are you able to use your device without having to worry about your data being compromised?

Never leave devices unattended – the physical security of your device is important.

If you need to leave your laptop, phone, or tablet for any length of time – lock it so it can’t be used by anyone else. (See the IT Users Policy

For desktop computers, you have the option to shut-down the system when not in use or to lock your screen.

To lock a laptop or desktop which uses Windows press Ctrl-Alt-Del and Select Lock or use Windows Key + L

To lock an Apple Mac’s screen, simultaneously press Control + Shift + Eject. (However if you have a newer Mac that doesn’t have an optical drive (and therefore has no eject key) press Control + Shift + Power).

Locking your device helps prevent others from viewing or using your device when you’re not around. The security of your device is your responsibility.


Devices should be set to automatically go to screensaver after a certain amount of inactivity. Do not depend on this time out for your security. Manually lock your device when you leave it unattended. (For some devices shutting down the device is suitable alternative).

For a mobile devices (tablet or phone usually running either Android or iOS) – set the device to require a strong password/PIN. Additionally set it to automatically lock when not in use.

  • For apple iPhones/iPads press the sleep/wake button.
  • For Android phones/tablets a single press of the power button commonly manually locks the device.

Some devices can be erased remotely, or erase themselves if the password/PIN is entered incorrectly too many times.

Where these settings exist consider turning these on to protect information in the case of theft or loss.

Phil Maud

Written By: Cranfield University

Categories & Tags:

Leave a comment on this post:

Sign up for more information about studying master’s and research degrees at Cranfield

Sign up now
Go to Top