Semiconductor memory card that records contents for trial and purchase, recording apparatus, reproducing apparatus, and sales method
US6901385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2001 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Sep 13, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor memory card which allows consumers to access and purchase content while protecting the copyright of the content. The memory card has a unique media ID assigned thereto and includes a secure data area and a non-secure data area. The secure are is accessible by an apparatus whose authenticity is verified, and the non-secure area is accessible by the apparatus regardless of such verification. The secure area stores a first encrypted content which is generated by encrypting a first content key by using the media ID, and the non-secure data area stores trial data and purchase data which can be decrypted. The trial data includes a first content which is encrypted by using the first content key, and the purchase data includes a second content which is encrypted by using a second content key. The purchase data can be decrypted when fee processing is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.