The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Mar. 02, 2023
Applicant:
Nec Laboratories Europe Gmbh, Heidelberg, DE;
Inventors:
Assignee:
NEC CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); H04L 9/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3218 (2013.01); H04L 9/0618 (2013.01); H04L 9/0656 (2013.01);
Abstract
A method for performing a privacy-preserving membership test includes performing an oblivious pseudo-random function (OPRF) protocol to determine a pseudo-random function (PRF) result based on an input from a proving device and a PRF key. The input indicates a user identity of a user associated with the providing device. The method further includes determining whether the user belongs to a verifier list associated with a verifier device based on testing membership of the user using the verifier list and the PRF result.