something involving canvas maybe? That info can be queried by the server afaik
On Saturday, March 29, 2014, <[email protected]> wrote: > Are you sure about that ? My source was an academic research a guy made, > in Germany. > > On 2014-03-29 20:32, Narcis Garcia wrote: > >> As I know, cached files or their content aren't uploaded back to >> webserver. >> >> >> Al 29/03/14 15:24, En/na [email protected] ha escrit: >> >>> I would like to report some additional findings: >>> >>> One way to track a user is to use graphic files as a substitute for >>> cookies. An image is created on a server with an identification number >>> encoded as color information. This image will be saved on a user's >>> computer in the browser cache. When this user visits the website again, >>> the locally stored image file will be opened and analyzed. The stored >>> color information will be sent back to the server to make tracking >>> possible. Since graphics are stored in a different location than >>> cookies, they aren't deleted when you clear your cookies. Other >>> techniques include HTTP E-Tags, Flash cookies or web storage. >>> >>> -- >>> http://gnuzilla.gnu.org >>> >> >> -- >> http://gnuzilla.gnu.org >> > > -- > http://gnuzilla.gnu.org > -- Claudio Fontana Werner-Friedmann-Bogen 28, D-80993 Muenchen email: [email protected] tel mobile (it): +39 342 1714257 tel mobile (work): +49 15253060158
-- http://gnuzilla.gnu.org
