Hacking is unauthorized use of computer and network resources. While this term originally referred to a clever or expert programmer, it is now more commonly used to refer to someone who can gain unauthorized access to other computers.

Computer hacking is difficult to define. Computer hacking always involves some degree of infringement on the privacy of others or damage to computer-based property such as files, web pages, or software. The impact of computer hacking varies from simply being invasive and annoying to illegal. For more information from the federal government about hacking and cyber crimes, visit the FBI Cyber Investigations website, or the US Department of Justice Computer Crime & Intellectual Property Section website.