The company, Ringleader Digital, uses HTML5's client-side database storage capability as a substitute for the traditional cookie tracking employed by all major online ad companies.
Mobile Safari users visiting sites with Ringleader ads are assigned a globally unique ID number which is stored by the browser, and recalled by Ringleader whenever they revisit.
But the tracker, labeled RLDGUID, does not go away when one clears cookies from the browser...
[wired.com...] |
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