Internet security

Summary form only given. In this paper, the author gives an overview to the Internet users with basic and advanced computing skills, about the current Internet security threats, when connecting internal networks or computers to the Internet. This explains about attackers, and the main types of Internet threats like breaching secret data, unauthorized access, denial of service, as well as important principles behind the Internet security vulnerabilities, like the Trojan horse programs. In this section the following points are briefly covered: cookies, secure sites, operating system patches updates, virus, authentications, encryption, digital certificates, proxy servers and firewalls.