Snowden: Spy agencies 'Screwed All of Us" in hacking crypto keys

"Our governments … should never be weighing the equities in an intelligence gathering operation such that a temporary benefit to surveillance regarding a few key targets is seen as more desireable than protecting the communications of a global system…"

I think it's a stretch to claim the NSA did this for a "few key targets". Good or bad, it seems casting a wide net, and then filtering the catch seems to be the preferred strategy. Does Snowden offer any proof that this was done to target only a few?