We all aware of traditional spy stories of intelligence agencies like MI5 bugging the phones of one or two people. In the last ten years, something else has happened. We now see mass surveillance, where computer systems of an entire country are infected by surveillance programs, where the entire phone calls of a nation can be and are recorded by a company.
Previously, we had all thought, why would the government be interested in me, my brother? My business is not interesting; I am not a criminal. Now these companies sell to state intelligence agencies the ability to spy on the entire population at once and keep that information permanently. In five or six years’ time, if your brother or someone becomes of interest to that company or the government, they can go back in time and look to see what you said or what you emailed.
(Source: socialuprooting)