Zombie Cookies Slated to be Killed

Turn said it would stop using tracking cookies that are impossible to delete. "We have heard the concerns and are actively re-evaluating this method," said Max Ochoa, Turn's chief privacy officer.

He said the company plans aims to suspend the practice by "early February." Turn's zombie cookie was exploiting a hidden undeletable number that Verizon uses to track its customers on their smartphones on tablets. Turn used the Verizon number to respawn tracking cookies that users had deleted. The company said it will now re-evaluate its practices.