8- 1 Why are information systems vulnerable to destruction, error, and abuse?

• List and describe the most common threats against contemporary information systems.

• Define malware and distinguish among a virus, a worm, and a Trojan horse.

• Define a hacker and explain how hackers create security problems and damage systems.

• Define computer crime. Provide two examples of crime in which computers are targets and two examples in which computers are used as instruments of crime.

• Define identity theft and phishing and explain why identity theft is such a big problem today.

• Describe the security and system reliability problems employees create.

• Explain how software defects affect system reliability and security.