Private information retrieval with sublinear public-key operations
US11593516B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2018 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Nov 24, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method (500) includes initializing a client state (250) on a client device (120) be executing a private batched sum retrieval instruction (200) to compute c sums O of data blocks (102) from an untrusted storage device (150). Each computed sum O stored on memory hardware (122) of the client device and including a sum of a corresponding subset S of exactly k data blocks. The method also includes a query instruction (300) to retrieve a query block Bq stored on the untrusted storage device by iterating through each of the c sums O of data blocks to identify one of the c sums O that does not include the query block Bq, instructing a service to pseudorandomly partition the untrusted storage device into partitions and sum the data blocks in each partition to determine a corresponding encrypted data block sum (302).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.