Facebook may have a troubled history with user privacy, but it certainly works hard to protect its users’ security. The social network has just made Facebook available over Tor, an open source security solution that encrypts messages through multiple network nodes.See also: Facebook, If You're Serious About Privacy Controls, Let Me Control ThemFacebook security engineer Alec Muffett noted that Tor users often face additional hurdles while trying to browse Facebook because of the way Tor encrypts a user’s location.