CowboyRobot writes: The National Security Agency has a system that allows it to collect pretty much everything a user does on the Internet even when those activities are done under the presumed protection of a virtual private network (VPN). This information comes from whistleblower Edward Snowden, the former NSA contractor now protected by asylum in Russia. Described in a 2008 presentation, the system, called XKeyscore, can reportedly track email addresses, logins, phone numbers, IP addresses and online activities (files, email contents, Facebook chats, etc.) and can cross-reference this information with other metadata. The NSA may not be able to crack all encryption but is likely to be able to handle weaker encryption such as PPTP and MS-Chap.