untangling_the_web

DID: 4046925
UNCLASSIFIEOIIFOR OFFIGIAL l:JSE ot.LY
~ Who your provider is.
~ Where your provider is located.
~ What site you last visited.
~ If you link to a site from a search engine, the query you ran.
~ What browser software you are using.
~ Your email address.
On the other hand, you may not be giving out all this information. Specifically, you
should make sure your browser does not provide the "HTTP_From" or
"REMOTE_USER" variables, both of which give away information about your email
address and other indications of your identity. Also ensure that the
"REMOTE_IDENT" variable is not being disclosed (more than likely, it is not). How
do you know if you are providing these variables? Go to the Junkbusters site listed
above and it will let you know.
•JUNKBUSTERS Alert on Web Privacy
You can be tracked from your mouse clicks
Most people surf the net under the illusionthat nobody will ever know what they look at. We want you to know what
companies find out about you when you visit their web sites.
Your browser assembles each page by makmg "HTTP requests" for its text and graphics parts from one or more web sites.
These sites may not have been named in the link you clicked on: two banner ads on the same page can come from' different
companies. Your browser gives allof them a lot of information you might prefer to keep private. Most sites store these details
indefinitely.
How they know where you came from
The "HTTP Referer" tells them what led you to the request.
In this case it was not provided.
• Ifyou use a search engine to find a site, the entire query you typed is typically handed to the sites you then click on.
• Ifyou clicked on a banner advertisement, the URL may contain coded data used to target specific ads at you. (Before
clicking on an ad, look at the URL displayed for it. Codes and long addresses suggest that your mouse clicks are being
tracked.)
• Ifthe URL you clicked on was in one of your private files, such as your email reader may use, the full file name is still
handed over to the web site. It may containinformation about you such as an indication of your name or email address,
the email program you are using, and the structure of your file space.
Junkbusters
http://www.junkbusters.com/cgi-bin/privacy
520 UNCLASSIFIEONFOR OFFlelAL I:JSE Or4L'f