Data transfer system, data transfer apparatus, data recording apparatus, edit controlling method, and data processing method

摘要

Disclosed is a method for causing either first content data transferred encrypted from a data transfer apparatus or second content data which are input unencrypted to be selectively recorded to a storage medium in a data recording apparatus. Given a command for editing the content data recorded on the storage medium, editing of the recorded data is inhibited or restricted if the data are judged to be the encrypted first content data. When the data recording apparatus is to return the encrypted first content data from the storage medium to the data transfer apparatus, the return of the first' content data is inhibited if the data are judged to have been edited. Upon return of the encrypted first content data to the data transfer apparatus, a content ID held by the data recording apparatus regarding the first content data is matched against a content ID held by the data transfer apparatus regarding the same data. Where the encrypted first content data are known to have been edited, the content ID matching process is omitted.