Title:
情報記録装置、情報再生装置、情報記録方法、情報再生方法、および情報記録媒体、並びにプログラム提供媒体
Document Type and Number:
Japanese Patent JP4595182
Kind Code:
B2
Abstract:
An information recording/playback device stores beforehand, on a recording medium, secret information in which a writing/reading method thereof cannot be analyzed and which can be read only by a special reading method. The secret information is applied to a key for content encryption or decryption when performing recording or playback of contents on the recording medium, such as music data and image data. The secret information is, for example, a stamper ID. By using the stamper ID as secret information, and a master key and a media key which are distributed in a tree-structure key-distribution system, a content-cryptosystem key is generated. Accordingly, each content is allowed to be used in only an appropriate device in which the special reading method for the secret information can be executed and to which the key is distributed by the tree-structure key-distribution system.
Inventors:
Tomoyuki Asano
Yoshitomo Osawa
Yoshitomo Osawa
Application Number:
JP2000270919A
Publication Date:
December 08, 2010
Filing Date:
September 07, 2000
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B20/10; H04L9/08; G06F12/14; G06F21/10; G06F21/60; G06F21/62; G11B20/00; H04N5/913; G11B20/12; H04N5/781; H04N5/85; H04N5/907; H04N9/79; H04N9/804
Domestic Patent References:
| JP2000215603A | ||||
| JP2000163883A | ||||
| JP2000231760A | ||||
| JP97014147A1 | ||||
| JP2000149423A | ||||
| JP2000228062A | ||||
| JP2000173179A | ||||
| JP2000156037A |
Foreign References:
| WO1997014144A1 |
Attorney, Agent or Firm:
Eiji Yamada
Masaaki Miyata
Toshio Sawada
Masaaki Miyata
Toshio Sawada