Privacy enhanced proximity tracker
US11515997B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2021 |
| Grant date | Nov 29, 2022 |
| Priority date | — |
| Expiry date | Jun 4, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/46
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device, system and method for privacy enhanced proximity detection by secure collaboration between a first party without access to user locations and a second party without access to a target user identifier. The second party may receive from the first party a homomorphic encryption public key and homomorphic encrypted target user identifier or masked target location, and may determine an associated homomorphic encrypted target user location. The second party may search a homomorphically encrypt database of user locations and associated user identifiers for homomorphic encrypted proximate user identifiers associated with homomorphic encrypted user locations proximate to the homomorphic encrypted target user location. The second party may send the first user the search result of homomorphic encrypted proximate user identifiers to be decrypted by the first party with a private key to identify proximate user identifiers without knowing their locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.