https://media.ccc.de/v/33c3-8034-build_your_own_nsa

How private companies leak your personal data into the public domain, and how you can buy it.

When thinking about surveillance, everyone worries about government agencies like the NSA and big corporations like Google and Facebook. But actually there are hundreds of companies that have also discovered data collection as a revenue source. We decided to do an experiment: Using simple social engineering techniques, we tried to get the most personal you may have in your procession.

['Andreas Dewes', '@sveckert']