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:
Dec. 02, 2025
Filed:
Apr. 25, 2022
Applicant:
Ntt Research, Inc., Sunnyvale, CA (US);
Inventors:
Assignee:
NTT Research, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01);
U.S. Cl.
CPC ...
H04L 9/32 (2013.01); H04L 9/08 (2013.01); H04L 9/40 (2022.05);
Abstract
The invention relates to systems, methods, network devices, and machine-readable media for encrypting and decrypting messages in a decentralized multi-authority attribute-based encryption (MA-ABE) scheme that is provably fully-adaptively secure, specifically, secure against an attacker that may corrupt some of the authorities as well as perform key queries adaptively throughout the lifetime of the system.