When you whitelist an application for corporate access through the VMware Tunnel, Workspace ONE UEM automatically deploys a unique X.509 certificate to enrolled devices. This certificate can then be used for mutual authentication and encryption between the application and the VMware Tunnel. Unlike other certificates used for Wi-Fi, VPN, and email authentication, this certificate resides within the application sandbox and can only be used within the specific app itself. By using this certificate, the VMware Tunnel can identify and allow only approved, recognized apps to communicate with corporate systems over HTTP(S), or, for Per-App Tunneling, TCP and HTTP(S).