The US surveillance program PRISM is just something that have been known for years, as the french say a secret de polichinelle (open secret). You will find on the internet more information, comments, blog posts on this, like here, or here or here.
My view on this subject is that with the popularity of social networks, the cloud service, all private information that was few years ago almost impossible to get is freely available on the social networks websites or on cloud providers data centers. Take for instance, the location based services (for users of twitter, facebook, android, ios, windows phone) is really a gold mine for secret services, a dream come true. They are able to know location of millions of people around the work. As smartphones, social networks get more adopted by the world population (there is already one billion smartphone users and this stat is from last year!) , secret services will be able to monitor all these people on daily basis.
A program like PRISM is in my opinion already outdated because there is much more to get easily from all the data available thanks to social networks and smartphones. The big issue is no more how to get this data but is how to sort it, how to find and locate the most relevant pieces among this huge amount of data.
Finally, we have to admit that privacy is almost dead and it is getting difficult to protect your privacy.
Dr. Tejeddine Mouelhi