Protecting digital data such as images on a device with image acquisition capabilities
US8473757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2009 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jul 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0894
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Digital data, such as images on a digital camera, is typically protected (e.g., encrypted and/or authenticated) based on a master key stored off the device. The original master key can be acquired in a number of different ways, including being generated by the device or by another device. A one-way, progressive series of keys are derived from the master key such that only images or data of a same session can be authenticated or decrypted for viewing, export or manipulation of the decrypted image/data. In order to decrypt images or data of a previous session on the device, the master key must be imported to the device, such as by, but not limited to, taking a picture of a representation of the key and interpreting the image to reacquire the master key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.