| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid a load due to the duplicate of a content not being viewed on a communication network and a server, and avoid limitation of the number of views due to viewing of the same content file and quality degradation due to load concentration on the server. <P>SOLUTION: A content management system includes a right server. When a subscriber acquires a new content and permits to share the content with other subscribers, a VM of the subscriber requires a right sever for managing ownership and browsing permission of contents on a cloud server to add entry of the content. The right server then adds the required entry of the content to a right table and registers "sharing permission" into an item of sharing permission. The right table has entry for each content and in each entry manages information comprised of a subscriber having ownership of the content, viewing permission of the content, and sharing permission showing that VMs of other subscribers also can share the content. <P>COPYRIGHT: (C)2013,JPO&INPIT |
