Virtual Private Networks

A virtual private network (VPN) is a mechanism to achieve secure connections between two or more geographically distant points (e.g., computers, networks). Among the reliable technologies for the safe use of computer systems in networks, VPNs are expanding at a remarkable pace. In recent years, VPNs have seen progressive commercial adoption by both private and public organizations. All this translates into rapid and interesting innovations and the proliferation of advanced services by specialized operators. This entry offers an overview of VPNs and their benefits and further considers their underlying technology and future applications.