A cyber attack is an attack on the Internet.

People called hackers use the Internet to break into other people’s computer systems.

What for? To steal or erase data or exchange them for money.

But how do they do it?

Hackers are specialists in information technology.

To break into other people’s computers, they test passwords, send thousands of emails and set up fake websites.

Normally, computers are protected by a firewall filter plus an antivirus program that detects and destroys intruders.