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Spyware Home Page
A comprehensive discussion about
the meaning of various terms, including spyware, can be found here:
Software that tracks user specific information and forwards it on to a third party or the spyware's designer/supplier. For the purposes of this definition, software that phones home for the purpose of 'legitimate' updates, such as antivirus programmes checking for updates, and software that transmits user specific information for the purpose of confirming eligibility for updates/upgrades is not classed as spyware. Programmers are entitled to ensure that their software is not being pirated, and that pirated software is not receiving the same benefits as legitimate users.
Software that generates advertisements such as pop-up windows or hotlinks on web pages that are not native to a page's code.
Software that damages your system or causes instability/crashes. Also used as a 'catch-all' name covering spyware, adware, foistware and betrayware.
Additional software included with a particular product, without which the product will not operate, or which is compulsory according to a product's EULA.
Betrayware (a term invented by Jim Eshelman)
"...one of the more insidious classes of weapons are programs that put themselves forth as anti-parasite programs — but, in fact, deploy adware and/or spyware themselves! Sometimes this software is free — sometimes they actually charge you money for it! — but all programs in this class lead you to believe they are making you safer, while actually invading your computer as insidiously as any other scumware..."
On the subject of betrayware, a company by the name of 'D Squared',
based in San Diego, California and created by two college students (Anish
Dhingra and Jeffrey Davis) has been banned by US regulators from using the
Windows 'Messenger Service' (not to be confused with Windows Messenger, the
Instant Messaging Programme) to generate unwanted pop-up ads on people's computers (also known as
netbios spam) Interestingly, a company of the same name is associated
with several *anti popup* sites, including 'blockmessenger.com',
'defeatmessenger.com' and several others.
(cite: http://www.ftc.gov/os/caselist/0323223.htm, http://www.ftc.gov/os/2003/11/0323223domains.pdf, http://news.bbc.co.uk/2/hi/technology/3551356.stm, http://www.ftc.gov/opa/2003/11/dsquared.htm)