Researchers test 'deep-sea internet' in a US lake
18 October 2013 Last updated at 16:04 BST
Researchers at the University of Buffalo, New York, test an underwater wireless network. Snapchat, a photo-sharing app which deletes images after they have been viewed, has its self-destruct feature circumvented by an app called SnapHack and Google faces a backlash over plans to use Google+ social network data in adverts.
BBC Click's Marc Cieslak looks at these and other tech news stories.