A system and method for video conferencing over a secure communication link is disclosed. In various implementations, the system is configured connect to a communication network, store a plurality of network addresses of devices of registered users, each device of a registered user having an application program for conducting video conferencing between, the client device and the target device, and establish a secure communication link between the client device and the target device. The secure communication link is established in response to a query (a) generated by the client device and (b) including an identifier associated with a network address of the target device, the establishment of the secure communication link being based on a determination that the target device can accept a secure communication link connection with the client device. Video conferencing is conducted over the secure communication link connection between the client device and the target device.