Privacy preserving statistical analysis for distributed databases
US8893292B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2012 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Nov 14, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/6245
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Aggregate statistics are determined by first randomizing independently data X and Y to obtain randomized data {circumflex over (X)} and Ŷ. The first randomizing preserves the privacy of the data X and Y. Then, the randomized data {circumflex over (X)} and Ŷ is randomized secondly to obtain randomized data {tilde over (X)} and {tilde over (Y)} for a server, and helper information T{tilde over (X)}|{circumflex over (X)} and TŶ|Ŷ for a client, wherein T represents an empirical distribution, and wherein the randomizing secondly preserves the privacy of the aggregate statistics of the data X and Y. The server then determines T{tilde over (X)},{tilde over (Y)}. Last, the client applies the side information T{tilde over (X)}|{circumflex over (X)} and TŶ|Ŷ to T{tilde over (X)},{tilde over (Y)} to obtain an estimated {dot over (T)}X,Y, where “|” and “,” between X and Y represent a conditional and joint distribution, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.