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Web bug noun. A small, invisible image embedded into an HTML-formatted email message or a Web site and used to track the activity of users who read the message or visit the site.

Example Citation:
"Invisible tags sometimes called Web bugs are widely used in HTML e-mail by marketers and others to detect whether an individual has opened an e-mail message. The Congressional Privacy Caucus has announced plans to hold hearings to investigate the use of Web bugs later this month. Mr. Smith said that it was now clear that JavaScript could be used to create a more powerful Web bug so that not only can someone find out when a message is read, but also what is being said about it."
—Amy Harmon, "A New Trick Gives Snoops Easy Access To E-Mail," The New York Times, February 5, 2001

Notes:
News of these Web bugs (also called HTML bugs) has exploded over the past couple of days, but they've been around in a less sophisticated form for about a year and a half. Their first exposure to the harsh light of the mainstream came in the following Washington Post article:


"Until recently, almost no one but computer specialists had heard about Web bugs, often known in the trade as 'clear GIFs.' But with exploding interest in target marketing on the Internet — and several companies poised to begin identifying computer users by name — Web bugs have suddenly drawn the attention of advertisers, government officials and privacy advocates."
—Robert O'Harrow Jr., "Fearing a Plague of 'Web Bugs'; Invisible Fact-Gathering Code Raises Privacy Concerns," The Washington Post, November 13, 1999

Related Words:
data spill
E.T. application
spam
spyware

Subject Categories:
Computers - Internet
Computers - Privacy and Security

Posted on February 7, 2001 at 8:28 AM
Updated on February 7, 2001 at 8:28 AM


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