"Security is the prevention of evil." Plato, verse 415. The course provides an overview of online threats and how to prevent them. There's no much security! From philosophical to practical level of understanding of this issue. In this course you learn about: Threat classification and reasons. Rump’s Paradox and history... Computer virus classification. 4) How does the virus work? Anti-virus program classification. Hackers and Anti-hacker programs. Rating of anti-virus programs. Rating of anti-hacker programs. Protection against spam. Examples of practical protection against intruders on the Internet. Welcome!