The Point-to-Point Tunneling Protocol is a method used to implement virtual private networks. The RFC can be found here: http://tools.ietf.org/html/rfc2637. PPTP is (as of Oct 2012) considered cryptographically broken and its use is no longer recommended by Microsoft.
PPTP has been demonstrated to be broken in many ways, and most installations are insecure. But it is also theoretically not broken if configured correctly. As an end-user, is there a simple way for ...