An introduction to the world of cybersecurity begins with the story of Stuxnet; this unique piece of malware shut down a uranium enrichment facility in Iran; a new age in which viruses and other cyber threats can manipulate the physical world.

Internet is vulnerable because of its ability to connect, and to be connected to anyone and almost anything; what goes on behind a simple Internet search; how a simple TCP/IP system functions; what makes up a conceptual map of cyberspace.

The cyber domain's vulnerability to cyber threats; the five gateways to this vulnerability; the Internet's ability to destroy time and space; allowing users to act in ways they cannot in the physical world; operating without international boundaries.

Some dangerous ways people exploit the Internet's vulnerabilities; DDoS attacks and Trojans; botnets control computers like puppets; investigating some common defense mechanisms that help pinpoint and capture these threats.

Identification is a major challenge for cybersecurity today; the question of network anonymity and identity; how people obscure their identities for malicious purposes; how network designers fight against this threat; the ethical problems involved.

Instances of cybercrime that involve fraud and identity theft; crimes that mimic real-world ones; computer crimes that are only possible in the cyber world; how law enforcement authorities fight against organized, international cyber criminals.