Preserving image privacy when manipulated by cloud services
US9276745B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Apr 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2107
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for preserving image privacy when manipulated by cloud services includes middleware for receiving an original image, splitting the original image into two sub-images, where the RGB pixel values of the sub-images have a bit value that is less than RGB pixel values of the original image. The sub-images are encrypted by adding a keystream to the RGB pixel values of the sub-images. The sub-image data is transmitted to a cloud service such as a social network or photo-sharing site, which manipulate the images by resizing, cropping, filtering, or the like. The sub-image data is received by the middleware and is successfully decrypted irrespective of the manipulations performed by the cloud services. In an alternative embodiment, the blocks of the original image are permutated when encrypted, and then reverse-permutated when decrypted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.