Kevin Bankston, senior staff attorney at the Electronic Frontier Foundation, is worried that Google might know more about its punters than their own mums.

Google knows what you searched for as well as your activity on partner Web sites that use its ad services. If you use the Chrome browser, it may know every Web site you've typed into the address bar.  It has all your email, if you use Gmail, appointments, and in some cases might know where you are sitting at the moment and what you are watching.  

If you use Google phone it could have a transcript of your phone conversation, not to mention your latest snaps. Google's argument is that it does not really know all that information it is just stored in its servers. But really it is asking you to trust it not to use the data or hand it over to others.

Bankston told Computerworld that Google is expecting consumers to trust it with the closest thing to a printout of their brain that has ever existed. Other problem is that Google has been too vague in explaining how it uses the data it collects, how it shares information among its services and with its advertisers, how it protects that data from litigators and government investigators, and how long it retains that data before deleting or "anonymising" it so that it can't be tracked back to individual users.