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:
Jan. 30, 2024
Filed:
Jul. 22, 2021
Applicants:
Mitsubishi Electric Corporation, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Inventors:
Assignees:
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/08 (2006.01); G06F 17/16 (2006.01); H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0825 (2013.01); G06F 17/16 (2013.01); H04L 9/0861 (2013.01); H04L 9/3247 (2013.01);
Abstract
A signature device () acquires a signature key SK(x) in which an attribute vector xis set over a basis B* of a basis B and the basis B*, which are dual bases in dual vector spaces. The signature device () generates a signature sig for a message MSG by setting predicate information of arithmetic branching programs (ABP) for the signature key SK(x). The signature device () outputs the signature sig and the message MSG to a verification device ().