Browser Add-On Shows Exactly Who's Watching You Surf   
   http://www.techsupportalert.com/content/browser-add-shows-exactl   
   -whos-watching-you-surf.htm   
      
   One of the golden rules about cookies is that, for security, the   
   only site that can read a cookie is the one that created it in the first   
   place. At least, that's the theory.  And that's what the security consultants   
   tell you. But it's not entirely true.   
      
   What happens if two web sites happen to have their on-site   
   advertising provided by the same agency?  If that agency writes cookies under   
   its own name, can it read them both?  And can it thus track your behaviour   
   across both web sites?  You betcha.   
      
   Collusion examines the cookies on your PC to find out who's been   
   sharing information with whom.   
      
   For the FF extension go to   
   https://secure.toolness.com/xpi/collusion.html to   
   download and install the add-in.   
      
   Now, just carry on surfing as normal.  At any point, when you   
   want to see the results of Collusion's analysis, head to   
   http://collusion.toolness.org.  You will see a chart with a set of red dot   
   indicating cookies through which your internet activity can be tracked.   
      
   --- Thunderbird 2.0.0.24 (Windows/20100228)   
    * Origin: Fidonet Via Newsreader - http://www.easternstar.info (1:123/789)