Establishing a remote control desktop sharing session through a server using token credentials from third party server

Two users (target 15 and initiating 14) may be in contact via a third party server (e.g. social network platform 16). They may decide to establish a desktop sharing session (e.g. using Virtual Network Computing (VNC)) such one device can remote control the other (e.g. for technical support/help). The initiator requests the session via the third party, which forwards the request to admin service 18. The admin service obtains target/initiator credentials and forwards to the target/initiator, it may also transmit necessary applications (e.g. VNC viewer/server). The target/initiator run sharing applications and request a session via core service 20. If the credentials are authenticated then a session is established.