1) should not be used anymore, it is more vulnerable by design (intercept the initial handshake and you're set; the NSA slides referred to a feature "Show VPN startups", which is probably what they meant by that).
So my guess is that when the say "we've cracked VPNs", it's probably PPTP VPNs, but then again, nobody knows for sure.
1. VPNs using PPTP
2. VPNs using OpenVPN
1) should not be used anymore, it is more vulnerable by design (intercept the initial handshake and you're set; the NSA slides referred to a feature "Show VPN startups", which is probably what they meant by that).
So my guess is that when the say "we've cracked VPNs", it's probably PPTP VPNs, but then again, nobody knows for sure.