5 Biggest cyberattacks in history that changed the digital security landscape forever

Cyber-attack refers to the intentional application of computer hardware, networks, or systems to cause damage, steal sensitive data, or disrupt normal operations. One lone hacker, a group of sophisticated cybercriminals, or even a nation state could carry out the attacks. As more data and infrastructure get digitised, governments, organisations, and individuals alike are increasingly threatened by cyberattacks in very concrete ways. These cyberattacks can vary from mere disruption to devastating intrusion with economic losses, loss of reputation, and compromised national security.

What is a cyberattack