Controlling access to data within encrypted copies of files using salt parameters
US8751804B1 · kind B1 · utility
23Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2011 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Oct 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/083
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A technique controls access to a file. The technique involves creating a file encryption key based on (i) a user input parameter (e.g., a user password) from a user of the client device and (ii) an automatically generated salt parameter (e.g., a random number). The technique further involves encrypting the file using the file encryption key to form an encrypted copy of the file, and providing the salt parameter to an external storage system to externally store the salt parameter. Access to data within the encrypted copy of the file requires the salt parameter provided to the external storage system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.