Information processing system, method and program for classifying network nodes

摘要

An information processor and method for classifying user attributes of a plurality of nodes connected to a network. The information processor includes: an action history obtaining unit for generating a spammer-reporting action history set; a related node obtaining unit for generating a node set and a link set related to the spammer-reporting actions; an undirected graph generation unit for generating an undirected graph from the node set and the link set; and a max-cut computation unit classifying the nodes constituting the undirected graph into two exclusive sets that do not commonly include any element so as to maximize an indicator value defined by links bridging the two sets.