公开(公告)号：US20240283632A1

公开(公告)日：2024-08-22

申请号：US18421778

申请日：2024-01-24

Applicant: Apple Inc.

Inventor： Rehan Rishi ,  Fabian K. Boemer ,  Karl Tarbe ,  Brandon J. Van Ryswyk ,  Marco Zuliani ,  Abhishek (APS) Bhowmick ,  Tancrède Lepoint

IPC: H04L9/00 ,  H04W8/26 ,  H04W12/04

CPC classification number: H04L9/008 ,  H04W8/26 ,  H04W12/04

Abstract: A computing device sends a request for location-based information (LBI) to a server, where the request includes first address information indicative of a geographic area (e.g., where the computing device is located), and an encrypted version of second address information that specifies a sub-region of the geographic area. The second address information is encrypted by a first key not accessible to the server. The first address information is used to select a subset of the LBI stored on the server. The server then performs a privacy protocol such as Private Information Retrieval on the selected subset using the encrypted second address information. This produces an encrypted version of the requested LBI without the server having access to information indicating which item of LBI was requested. The encrypted version of the particular item of LBI is returned to the computing device, where it can be decrypted using a second key.