公开(公告)号：US20250038956A1

公开(公告)日：2025-01-30

申请号：US18283387

申请日：2022-11-16

Applicant: Google LLC

Inventor： Shreedhar Madhavapeddi ,  Marcel M. Moti Yung ,  Bashar Kachachi ,  Stephen W. Rupp ,  Samuel Benjamin Temes ,  Shreya Mathur

IPC: H04L9/08

Abstract: This disclosure relates to protecting the security and privacy of data, including user identifiers (IDs). In some aspects, a method includes receiving, by a cryptographically-secure private set intersection (CSPSI) server and from a first device corresponding to a first entity, a first identifier retrieval request corresponding to a digital component request being sent from the first device to a second device corresponding to a second entity. The first identifier retrieval request includes a first encrypted user identifier generated by encrypting a user identifier for a user using a first encryption key corresponding to the first entity. The CSPSI server determines, using the encrypted user identifier, a bilateral encrypted user identifier for the user generated by encrypting the first encrypted user identifier using a second encryption key corresponding to the second entity. The CSPSI server sends the bilateral encrypted user identifier for the user to the first device.