General Discussion
In reply to the discussion: Snowden says he could see what I do on the web. [View all]ljm2002
(10,751 posts)...to do what Snowden is claiming"
What about those real-time pickups on optic cables?
Each of us leaves identifiable traces when browsing the web, shopping, etc. If the government deems you or me a target, they can plug in those identifiable data values (e.g., originating IP address) and siphon off any packets that correspond. That is not coming out of a gigantic database (except in a theoretical way, where you might say that all data that exists is part of a gigantic database). Furthermore, since the NSA actively introduced defects into the security algorithms used in these transactions, there's a good chance they can decipher a lot of encrypted packets.
Anyway, I don't know this is being done, or if that is what Snowden was implying. I'm just saying, it may not require what you think it requires.
Furthermore, the NSA DOES keep "a mix of some huge databases", and they are showing no signs of scaling down. That facility in Utah is nearing completion...
BTW I have worked on software systems that are used in data mining.