One solution, brokered by the Internet Advertising Bureau, might be the use of an icon on adverts that, when clicked, reveals information about data being gathered.

BBC: Websites told to ensure cookies comply with UK law

Apple lawyers responded by noting that Ms. Wang had copies of Apple's own icon guidelines that were available on the Internet, and she had documents that compared Apple's icons side by side with the ones her team had made.

WSJ: Samsung Accuses Apple of Patent Infringement

Tallinn is the centre of NATO's cyber-warfare research, and Estonians invented another icon of internet cool: Skype.

ECONOMIST: What has Apple got against eastern Europe?