Tracking Browsers Without Cookies Or IP Addresses? 265
Peter Eckersley writes "The EFF has launched a research project called Panopticlick, to determine whether seemingly innocuous browser configuration information (like User Agent strings, plugin versions and fonts) may create unique fingerprints that allow web users to be tracked, even if they limit or delete cookies. Preliminary results indicate that the User Agent string alone has 10.5 bits of entropy, which means that for a typical Internet user, only one in about 1,500 (2 ^ 10.5) others will share their User Agent string.
If you visit Panopticlick, you can get a reading of how rare or unique your browser configuration is, as well as helping EFF to collect better data about this problem and how best to defend against it." I remember laughing years ago when I would see users who had modified their user agent string with some sort of defiant pro-privacy message, without realizing that their action made them uniquely identifiable out of hundreds of thousands of others.
LOL (Score:4, Insightful)
The site says Only anonymous data will be collected by this site. Yet they are collecting data to see how un-anonymous you actually really are! :)
Re:Results and flash cookies (Score:2, Insightful)
Compiling Firefox (Score:5, Insightful)
I noticed this years ago, when I noticed that compiling Firefox puts the exact date and time in your user-agent. The user-agent also contains the usual things like the OS, architecture, &c.. So how likely is it that someone else with the exact same system configuration and compiled the exact same version of Firefox at the same time? Probably zero.
Re:Results and flash cookies (Score:3, Insightful)
Re:More Unique, Less trackable (Score:3, Insightful)
I claim prior art! (Score:2, Insightful)