Data processing system, data processing method, information processing device, and computer program

摘要

An interest vector is configured using a parameter indicating a degree of interest in each category based on user interest information received by a control server on a peer-to-peer network. An interest vector having a short distance from the interest vector of a requesting user who sent a content retrieval request is selected to make an inquiry about the presence or absence of the requested content. Therefore, reliable content retrieval can be achieved without storing content in the control server. The interest vector can be updated under various conditions, thus maintaining the accuracy of the user interest information.