Patent ID: 8881242

Claim:
An information communication system in which a content is distributed and stored by an overlay network configured by a plurality of node apparatuses including a first node apparatus and which comprises a center server configured to manage the content to be submitted to the overlay network, the information communication system comprising: the first node apparatus comprising a first controller configured to control the first node apparatus to: assign content identification information, which identifies the content on the overlay network, to the content; divide the content into a plurality of chunks; assign chunk identification information and sequence number to each of the plurality of chunks; create hash value related to the plurality of chunks: create meta-information including the chunk identification information, the sequence number and the hash value, the meta-information being assigned the content identification information and being to be used in searching the content to the overlay network; transmit the created meta-information to the center server; receive the meta-information and an electronic signature verifying the meta-file from the center server; and permit the received meta-information to be acquired on the overlay network; and the center server comprising a second controller configured to control the center server to: receive the meta-information from the first node apparatus; determine whether the received meta-information is proper meta-information; and transmit the electronic signature to the first node apparatus of a transmission source of the received meta-information in response determining that the received meta-information is proper meta-information.