Computer system threats come in many different forms. Some of the most common threats today are software attacks, theft of intellectual property, identity theft, theft of equipment or information, sabotage, and information extortion. Most people have experienced software attacks of some sort. Viruses, worms, phishing attacks, and trojan horses are a few common examples of software attacks. The theft of intellectual property has also been an extensive issue for many businesses in the IT field.
Investigating and stopping computer crime is difficult. Hacking is often not difficult to accomplish and the tools required to hack are freely available. Many hackers argue that hacking is often a victimless crime. Additionally, the Internet is international and the hacker is anonymous, which makes it hard to pursue and catch them. One answer is to step up computer security but, in reality, anti-virus software can only, by definition, deal with known viruses and so the software is always one step behind the inventive hacker.