Cybersecurity is the field focused on protecting computer systems, networks, and digital data from unauthorized access, theft, damage, or disruption. It encompasses a combination of technologies, processes, and controls employed to safeguard the confidentiality, integrity, and availability of information. By defending against cyber threats such as malware, hacking, phishing, and insider attacks, cybersecurity ensures secure communication, data privacy, and system resilience.

It is critical for governments, businesses, and individuals to prevent financial loss, identity theft, and operational disruptions in an increasingly digital world. Effective cybersecurity integrates people, policies, and technology to continuously manage and reduce risks across all cyber assets.