Creating secure virtual databases storing masked data
US10083196B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2016 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Mar 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/6227
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A database storage system creates secure snapshots or virtual databases based on a source database that stores sensitive information. The database storage system applies a masking function to the sensitive data and stores the masked data in the secure snapshot. The database storage system creates secure snapshots that share masked database blocks with other secure snapshots. The database storage system shares masked database blocks by storing information identifying a previously created masked database block for a new secure snapshot. If a masked database block for the new secure snapshot is different from the previously created masked database block, the database storage system stores metadata including the difference between the two masked database blocks. The database storage system allows sharing any transformed database blocks across snapshot, if the transformed database blocks are obtained by applying a transformation function to data of the source database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.