Title:
記録担体
Document Type and Number:
Japanese Patent JP5739925
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:
JP2013048199A
Publication Date:
June 24, 2015
Filing Date:
March 11, 2013
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:
| JP2000330870A | ||||
| JP9185501A | ||||
| JP7131452A |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki