NETWORK TRANSMISSION CORRESPONDENT CONTENT USAGE MANAGEMENT METHOD, AND PROGRAM, CONTENT TRANSMISSION SYSTEM

摘要

A system estimates accessibility on the basis of information of a requesting device and digital rights management information (408) of content when a utilization request of the content is raised through a network. In a device including a hard disk (103) for storing a plurality of content files and having a networking function for transmitting the content file to other device, a utilization condition and a utilization state are so managed as to correspond to the content file and when a utilization request of a content file is made, utilizability of the content file is judged from a utilization object in the utilization request and from information of a transmitting device of the utilization request. When utilization is not judged as possible, a report is made to the transmitting device of the utilization request to the effect that the content file cannot be utilized.