Batch privacy information retrieval method and apparatus
US12174990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2024 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Apr 10, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/602
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A batch private information retrieval method and apparatus, including: agreeing on a hash function, calculating a serial number index in an original database, retaining a result of each serial number index for each hash function, and obtaining a first hash bucket; filling an index of a batch query into a second hash bucket of a same length as the first hash bucket by the client, and encoding a filling result by using a constant weight code encoding manner; encrypting an obtained encoding result as a batch query request by the client; comparing the batch query request with the first hash bucket by the server to obtain a corresponding intermediate result, calculating correspondingly the intermediate result and the original database to obtain a corresponding query result ciphertext; and decrypting the query result ciphertext by the client, and thus simultaneously obtaining a query result of the batch query request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.