Patent ID: 7141733

Claim:
A content reproducing system, comprising: a plurality of content reproducing apparatuses, each of the content reproducing apparatuses including: a storage device that stores content data which is identical to each other among the plurality of content reproducing apparatuses, wherein the content data includes a first group for reproducing at least one of audio or visual content which needs allowance for reproducing and a second group for reproducing at least one of audio or visual components which do not need allowance for reproducing, and the storage device has a key data storage area which stores key data for allowing the content reproducing apparatus to reproduce the content data; and a controller for performing reproduction of the first group when reproduction of the content data is requested, provided that the key data corresponding to the first group has been stored in the key data storage area of the storage device; and a center that separately sends the key data to the corresponding content reproducing apparatus to separately manage the first group of the content data for each of the content reproducing apparatuses.