When you browse a page on the web, your browser requests the information it needs to display that page.

One of the things it requests is the graphics for the page.

People who want to track your movements across the web figured out how to use graphics to get your browser to tell them who you are and what you are doing.

These graphics are called "web bugs".

What is a Web Bug?

According to Richard M. Smith's Web Bug FAQ at the Electronic Frontier Foundation,

"A Web Bug is a graphic on a Web Page or in an Email message that is designed to monitor who is reading the Web Page or email message. Web Bugs are often invisible because they are typically only 1-by-1 pixel in size."

How can I find out more?

Well, I could have written an article. But I found Richard M. Smith's excellent FAQ. Instead of trying to figure out new ways to say what he already said so well, I'll just refer you to his FAQ.

Across the Net

The Web Bug FAQ: Richard M. Smith's excellent Web Bug FAQ hosted at the Electronic Frontier Foundation. Do not be put off by the "old" date (11.Nov.1999). It is still accurate, and, in my opinion, still the best FAQ on this topic. ««»»

This page created:
before
Fri, 25.Oct.2002

Last updated:
16:48, Fri, 27.Jun.2008