While the advertising industry pays lip service to demands that they do not use zombie cookies to track punters, a large number of popular sites have signed up to a service called Kissmetrics.
According to boffins at Berkeley, Kissmetrics is a tracking service that can’t be stopped even when users block cookies, turn off storage in Flash, or use browsers’ steath functions. Kissmetrics is used by sites to track the number of visitors, what the visitors do on the site and where they have been.
According to the Berkeley boffins it uses sneaky techniques to prevent users from opting out of being tracked.
The Berkeley research team, which was headed by privacy lawyer Chris Hoofnagle, and included privacy researcher Ashkan Soltani, described the code as damning.