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. 12, 2025
Filed:
Jun. 17, 2022
Applicant:
Ntt Research, Inc., Sunnyvale, CA (US);
Inventor:
Hoeteck Wee, San Francisco, CA (US);
Assignee:
NTT Research, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/40 (2022.01); H04L 9/06 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
H04L 63/0428 (2013.01); H04L 9/0618 (2013.01); H04L 9/30 (2013.01);
Abstract
A broadcast network can use a pairing-based broadcast encryption scheme for N users with O(N)-sized parameters. A pairing-based ciphertext-policy attribute-based encryption (CP-ABE) scheme for the class of degree 3 polynomials can be implemented with compact parameters. The public key, ciphertext and secret keys comprise O(n) group elements, where n is input length for the function. The constructions achieve adaptive security against unbounded collusions, and rely on the (bilateral) k-Lin assumption in prime-order bilinear groups.