Internet security is a branch of computer science that focuses on protecting data and information from unauthorized access, cyber attacks, and other threats on the internet. It encompasses various technologies, processes, and practices designed to ensure the confidentiality, integrity, and availability of data transmitted over the internet. Internet security measures include encryption, firewalls, antivirus software, intrusion detection systems, and secure network protocols. The goal of internet security is to create a safe and secure online environment for users to communicate, conduct transactions, and access information without fear of compromise or theft.