US 12,425,378 B2
Privacy preserving verification of user data
Tomasz Korwin-Gajkowski, Stuttgart (DE); Rik Claesen, Stuttgart (DE); Hugo Embrechts, Stuttgart (DE); and Teemu Pohjola, Stuttgart (DE)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/801,524
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Mar. 4, 2021, PCT No. PCT/EP2021/055461
§ 371(c)(1), (2) Date Aug. 23, 2022,
PCT Pub. No. WO2021/185589, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 20163482 (EP), filed on Mar. 17, 2020.
Prior Publication US 2023/0070824 A1, Mar. 9, 2023
Int. Cl. H04L 9/40 (2022.01); H04L 9/32 (2006.01)
CPC H04L 63/0428 (2013.01) [H04L 9/3247 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method, comprising at a first user device:
receiving user data from a tamper-proof second user device;
aggregating the user data according to a first logic to generate plaintext aggregated user data;
transmitting the aggregated user data and the user data to an external server;
at the external server:
determining first aggregated encrypted data by applying a predefined second logic to the user data;
determining second aggregated encrypted data by encrypting the plaintext aggregated user data received from the first user device;
verifying whether the first logic, by which the aggregated user data and the user data are related to each other, corresponds to the predefined second logic for verifying a validity of the aggregated user data by comparing the first aggregated encrypted data and the second aggregated encrypted data; and
providing an external entity access to a verification result indicating the validity of the aggregated user data while preventing the external entity from accessing the user data and the aggregated user data.