A VPN, or Virtual Private Network, is a secure tunnel between two or more devices. A VPN can be used to encrypt traffic, prevent spying, and bypass geographical restrictions. Knox VPN is Samsung's official VPN service. It is available on select Samsung devices running Android 6.0 Marshmallow or higher. With Knox VPN, you can connect to corporate networks and access internal resources such as email and file servers. You can also use Knox VPN to browse the web privately and securely.