When the NSA is the group disseminating the information, it very much IS possible to guarantee that certain types of information are not shared. The most obviou

When the NSA is the group disseminating the information, it very much IS possible to guarantee that certain types of information are not shared. The most obvious solution being: don't share ANYTHING. This is an argument of secrecy versus convenience, which you'd think for your National Security Agency, would be a pretty simple equation. A more cynical view of this is that they've made an intentionally leaky ship to do a ring around domestic spying laws using a 'trusted' partner, but given the recent publicity, I'm not sure they care enough to have even that slim cover of legality.