Backup System, Recording/Reproduction Device, Backup Device, Backup Method, Program, and Integrated Circuit

摘要

A content of Copy Once cannot be copied to an external device or the like, even for the purpose of making a backup. This is inconvenient for the user. However, if copying to another device for the purpose of making a backup is permitted, the content may be copied in an unauthorized manner. The present invention provides the hard disk recorder 100 that transmits the content to the backup device 500 , sets an expiration time in the content stored in the hard disk recorder 100 itself, and deletes the content stored in the hard disk recorder 100 itself after the expiration time expires.