Ebook encryption using variable keys
US8826036B1 · kind B1 · utility
20Cited by
1References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2010 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Nov 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/1011
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic book distribution system encrypts distributed electronic books (“eBooks”) with a content key. The content key is in turn encrypted with a voucher key. The voucher key for a particular eBook is generated based on a combination of (a) an ID or serial number of an eBook reader device to which the eBook is being distributed, (b) a user account secret associated with a user of the eBook reader device, and (c) metadata associated with the eBook itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.