PRISM: The Amazingly Low Cost of Using BigData to Know More About You in Under a Minute [feedly]04 Jul 2013
There has been a lot of speculation and assumptions around whether PRISM exists and if it is cost effective. I don't know whether it exists or not, but I can tell you if it could be built.
Short answer: It can.
If you believe it would be impossible for someone with access to a social "datapool" to find out more about you (if they really want to track you down) in the tsunami of data, you need to think again.
Devices, apps and websites are transmitting data. Lots of data. The questions are could the data compiled and searched and how costly would it be to search for your targeted data. (hint: It is not $4.56 trillion).
Let's experiment and try to build PRISM by ourselves with a few assumptions: