Computer security is a branch of information technology that focuses on protecting computer systems and networks from unauthorized access, data breaches, cyber attacks, and other security threats. This includes securing computer hardware, software, data, and information systems, as well as ensuring the confidentiality, integrity, and availability of digital resources. Computer security measures often include using encryption, firewalls, antivirus software, intrusion detection systems, access controls, and other techniques to safeguard sensitive data and prevent malicious activities. The field of computer security is constantly evolving as new threats emerge and technologies develop, making it crucial for organizations and individuals to stay updated on the latest security best practices and tools.