Patent ID: 7886365

Claim:
A content distributing system for transmitting content including license information indicating a content type of the content, the content distributing system comprising: a transmission device; a routing device; a reception device; and an analyzing device that stores therein an analysis condition that includes a predetermined number and a predetermined time period, wherein the transmission device is operable to transmit to the routing device a transmission target address specifying the reception device and the content, the content being associated with copy control information regarding a number of times the content is able to be copied, the copy control information not limiting a number of times the content is able to be transmitted to the reception device specified by the transmission target address, the number of times the content is able to be copied being distinct from the number of times the content is able to be transmitted, the routing device is operable (i) to receive the transmission target address and the content from the transmission device, (ii) to transmit the content to the reception device specified by the transmission target address, (iii) to judge whether or not to generate log information using the license information included with the content, the log information indicating that the content has been transmitted from the transmission device to the reception device, and (iv) only when judging that the log information is to be generated, to generate the log information and store the generated log information, the reception device is operable to receive the content transmitted from the routing device, and the analyzing device is operable to obtain the log information from the routing device, to count a number of times the same content is transmitted to the same reception device based on the obtained log information, to determine whether the counted number of times the same content is transmitted to the same reception device within the predetermined time period exceeds the predetermined number, and to judge that the reception device is an unauthorized device when it is determined that the counted number of times the same content is transmitted to the same reception device within the predetermined time period exceeds the predetermined number.