In today’s digital world, information is power — and money. This means that keeping data safe is one of the most important challenges in modern computing. From small businesses to massive global companies, everyone has valuable data that needs protecting.

To stop hackers, cybercriminals, and unauthorised users, organisations spend millions on security software, expert staff, and strict procedures. These protections don’t just stop attacks — they help protect your private information, too.

There are two key security methods you need to know about:

• Firewalls – software that checks all incoming and outgoing data to block anything dangerous.

• Encryption – a method of scrambling data so no one can read it without the correct key.

In this section, we’ll explore both methods in more detail, and see why they matter so much in keeping us safe online.