Patent ID: 9596293
Date: 2017-03-14
CPC Classifications: G06F,H04L,H04M,H04N

Claim:
1. A content transmission device for connecting to a network to send a data packet, comprising hardware configured to: acquire the data packet including a content, which requires high-throughput transmission, and is to be transmitted to a reception unit through the network; determine whether to permit use of a part of the content on a permitted content receiving node; process the part of the content, when the use of the part of the content on the permitted content receiving node is determined to be permitted, so that the content will become usable on the permitted content receiving node; transmit, through the network, the data packet including the same processed content to both the reception unit and the permitted content receiving node when the use of the part of the content on the permitted content receiving node is determined to be permitted, transmit, through the network, the acquired data packet including the content only to the reception unit when the use of the part of the content on the permitted content receiving node is determined not to be permitted, use processing for hierarchically structuring the part of the content, the use of which on the content receiving node is determined to be permitted, to divide the part of the content into a basic portion and an enhanced portion including information for compensating an amount of information on the basic portion in order to create a data packet including the basic portion and a data packet including the enhanced portion, encrypt the data packet including the basic portion by using such a key that can be decrypted at both the reception unit and the content receiving node, and encrypt the data packet including the enhanced portion by using such a key that cannot be decrypted at the content receiving node, and add first identification information and second identification information to the data packet including the basic portion and the data packet including the enhanced portion, where the first identification information indicates that the data packet is a packet to be transmitted in high priority and broadband, and the second identification information indicates that the content included in the data packet is usable on the content receiving node.