Managing public and private resources in a computer network

A node machine 1 configuring an information network includes resources 2 located in a private zone available to private use, resources 3 located in a public zone for public service use, and a private resource security management unit 4 for management of the security of the resources 2 located in the private zone. The problem with current Peer-to-peer (P2P) systems is that it is not possible to sufficiently guarantee the security of resources especially for use in private use while discriminating the resources for public use from the resources for private use. The present invention aims at a dividing zone in which resources are located into a public and private zone, locating in the private zone the resources to which unauthorized access is rejected. It configures each community as a logical network which is guaranteed the security without consideration of a physical network.