Disc manufacturing method, data recording apparatus, information recording medium, information processing apparatus and method, and computer program
US8332950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2006 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Mar 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A product mark including a public key certificate issued with respect to an information-recording-medium manufacturing entity or information-recording-medium manufacturing equipment, and an encrypted volume ID calculated by computation based on a product-mark-associated value such as a hash value generated on the basis of the product mark, and a volume ID as an identifier set with respect to a given set of discs to be manufactured, are generated. The product mark and the encrypted volume ID are set as information for generating a key used for decryption of encrypted content, and recorded onto a disc by a reflective-film-removal recording method. Due to this configuration, the product mark and the encrypted volume ID as key generating information cannot be read from a pirated disc produced by physically copying a pit pattern on the basis of a legitimate commercial disc, thereby making it possible to prevent unauthorized reproduction or use of content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.