How can you achieve security in using computer and the Internet?

Internet security is a branch of computer security. It encompasses the Internet, browser security, web site security,[1] and network security as it applies to other applications or operating systems as a whole. Its objective is to establish rules and measures to use against attacks over the Internet.[2] The Internet is an inherently insecure channel for information exchange, with high risk of intrusion or fraud, such as phishing,[3] online viruses, trojans, ransomware and worms.

Many methods are used to combat these threats, including encryption and ground-up engineering.[4]