A class action lawsuit has been filed in California federal District Court against Ringleader Digital. The New York based advertising agency uses HTML5 database storage to tracks Mobile Safari users. The lawsuit takes aim at the persistent monitoring of users, without their consent, across webpages. Unlike cookies, the HTML5 database storage cannot be deleted from the user's mobile device. Companies using Ringleader's Media Stamp technology include Surfline, WhitePages.com, The Travel Channel, CNN Money, Go2 and Merriam-Webster's dictionary site. These companies are also named as defendants in the suit.
Lawsuit Targets Mobile Advertiser Over Sneaky HTML5 Pseudo-Cookies, David Kravets, wired.com, September 16, 2010