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invisible GIF

   Also found in: Wikipedia 0.01 sec.
invisible GIF
A single-pixel GIF file set to a transparent status and thus invisible. Also known as a "transparent GIF," "1-by-1 GIF" and "clear GIF," it is is used as a tracking mechanism for Web pages to monitor a user's activity. See Web bug and GIF.


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Proxy servers also help in the prevention of web bugs also known as web beacons, pixel tag or invisible GIF.
Privacy advocates have been raising the alarm over Web bugs, which are invisible GIFs that can collect information about Web site visitors without their knowledge (see "Cleaning Up Data Spills," "Tech Talk," May).
 
 
 
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