Have you seen the headlines lately?  Hacking and surveillance are bigger news than the next iPhone.  Yet companies like Google, Apple and Dropbox have been urging us to load all our photos, and sometimes even more precious documents, in an online vault called the cloud.  It’s actually huge racks of servers, in locations all over the world. 

What could possibly go wrong with hundreds of millions of people storing personal data in a centralized warehouse? 

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