Cybersecurity is the protection and defense of cyberspace from cyber attacks. Cyberspace is a virtual environment created by computer systems, mostly on the internet. A cyber attack is an attempt to disrupt or control a computing system in cyberspace to destroy data integrity or steal access-restricted information. Cybersecurity focuses on protecting sensitive information stored or accessed via the internet from cyber attacks. It is a subset of information security, which encompasses the protection of information and information systems from unauthorized access, use, disclosure, disruption, modification, or destruction. Cyber attacks can be carried out through various channels, such as phishing, malware, man-in-the-middle, and brute force attacks. The principles of cybersecurity include confidentiality, integrity, and availability. Confidentiality ensures that information is only accessible to authorized users, integrity ensures information remains accurate and unmodified, and availability ensures authorized users can access the information without hindrance. Best practices for cybersecurity include formulating a cybersecurity policy that addresses measures to prevent breaches and respond to them, incorporating both human- and technology-focused measures.