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Tech review: A look back at the week's headlines

18 July 2014 Last updated at 09:26 BST

A leaked online document suggests intelligence agency GCHQ worked on ways to alter the outcome of internet polls, sent spoof emails that appeared to be from Blackberry users and looked at private Facebook photos. GCHQ said it "did not comment on intelligence matters".

A "smart" contact lens to help diabetics monitor their glucose levels is being developed in a deal between pharmaceutical company Novartis and Google.

And the head of a parliamentary committee looking into US spying in Germany has said they have considered using typewriters for sensitive documents to avoid electronic eavesdropping.

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