Cybersecurity refers to the protection of computer systems and networks from unauthorized access, theft, damage, or disruption. Cybersecurity is an increasingly important concern as more and more sensitive information is stored and transmitted online. Popular cybersecurity platforms include McAfee, Symantec, and Kaspersky. Learn about Cybersecurity refers to the practice of protecting computer systems and networks from unauthorized access, theft, damage, or disruption. Cybersecurity is important for protecting sensitive data, such as personal information, financial records, and intellectual property. Cybersecurity measures include firewalls, encryption, and intrusion detection systems.