Verizon, AT&T Use 'Supercookies' to Track Internet Use

Verizon and AT&T have been quietly tracking the Internet activity of more than 100 million cellular customers with what critics have dubbed “supercookies” -- markers so powerful that it’s difficult for even savvy users to escape them. The technology has allowed the companies to monitor which sites their customers visit, cataloging their tastes and interests. Read the article: The Washington Post