Techniques are described herein for supporting efficient evaluation of pivot operations. An interface is provided for accessing the home devices that are currently connected to a home network. The first computer, which is operable as a service provider and runs the legacy application, publishes an interface model of its legacy application functions. A corresponding point seeker seeks a plurality of corresponding points, which respectively correspond to the plurality of selected feature points, from an image to be sought, which is sensed at another time, and the contour between the plurality of found corresponding points is extracted on the basis of the stored connectivity. Based on the cluster membership information, the joining node may request a peer-to-peer connection with each potential cluster member.