The most recent edition of this book came out a few years ago, so it doesn't verify this year's claims specifically: http://mitpress.mit.edu/books/privacy-line

The most recent edition of this book came out a few years ago, so it doesn't verify this year's claims specifically: http://mitpress.mit.edu/books/privacy-line http://mitpress.mit.edu/books/privacy-line ...but what it does explain (and backs up with a plethora of sources) makes this summer's NSA news sound like business as usual.