From MIT's Mims' Bits blog:
Behavior and history-sniffing websites know what you copy, click, and rollover, and even which of their competitors you're visiting.
A new paper (pdf) from researchers at the University of California, San Diego reveals that a significant proportion of the 50,000 most-visited sites on the web are engaging in some level of behavioral tracking. Furthermore, and more disturbingly, a few are actually examining your browser's history to determine what other sites you visit, exploiting a security vulnerability known about for a decade.
Youporn.com, which determines whether a user has visited its competitors' websites, even went so far as to engage in a primitive form of cryptography in order to hide the URLs of the sites it's asking about.
The researchers singled out the Huffington Post for special opprobrium...MORE