Content usage device and network system, and license information acquisition method

摘要

A content usage device 1 includes (i) a license management unit 1a that holds license information and (ii) a content output unit 1b that uses a content in compliance with license information and outputs the content in at least one manner of a sound, video and data. The license management unit 1a, upon receiving a request of license information from the content output unit 1b, requests a license management unit of another content usage device to transfer the license information and acquires the license information, and passes the acquired license information to the content output unit 1b. The content output unit 1b uses a content in compliance with the license information passed from the license management unit 1a.