Title:
デジタル作品を記録する記録担体、方法及び装置
Document Type and Number:
Japanese Patent JP4944355
Kind Code:
B2
Abstract:
A record carrier for storing a digital work (DW) includes access information (KLT) for gaining access to the digital work and a secondary channel (HC) in which secondary channel information (KLK) is stored which is used for encrypting, decrypting or verifying the access information (KLT). In order to prevent, hinder or discourage tampering with the access information (KLT), the secondary channel (HC) is stored on the record carrier on substantially the same physical location as the access information (KLT). In a preferred embodiment, the secondary channel information (KLK) is changed when the access information (KLT) has changed. This realizes a record carrier for which a replay-attack is prevented.
Inventors:
Sterling antonius am
Application Number:
JP2002592123A
Publication Date:
May 30, 2012
Filing Date:
May 17, 2002
Export Citation:
Assignee:
UQ, LRC
International Classes:
G06F12/14; G11B20/10; G06F1/00; G06F21/62; G11B11/00; G11B20/00; G11B20/12; G11B20/14; H03M5/14; H03M7/46; H04L9/00; H04L9/32
Domestic Patent References:
| JP200143138A | ||||
| JP2001189021A | ||||
| JP200116195A | ||||
| JP11288327A | ||||
| JP8161834A | ||||
| JP729307A |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito