It appears as if Brian Atkins <brian@posthuman.com> wrote:
|
|The technique is that DoubleClick pays the adult site to put a 1x1 pixel
|invisible graphic on their site. When your browser hits the site, it also
|loads the graphic which is served from DoubleClick's servers so your browser
|also sends your DoubleClick cookie (you do have one, don't you?) to them
|along with a referrer URL in the HTTP request that DoubleClick can then use
|to know what site you are at currently.
A peson who have access to the local machine's host definitions can define
the local machine as doubleclick.ad.net (or whatever the name of their host)
and have a small web server which simply returns a one-pixel picture for
everything asked from from it. The client will ask this server instead of
DoubleClick's server, and they recieve no information from this host.
__________________________________________________________
"This is Information Retrieval, not Information Disposal."
--from the film Brazil
This archive was generated by hypermail 2b29 : Mon Oct 02 2000 - 17:33:49 MDT