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. 15, 2023
Filed:
Nov. 07, 2018
Nec Corporation, Tokyo, JP;
Akiko Inoue, Tokyo, JP;
Kazuhiko Minematsu, Tokyo, JP;
NRC CORPORATION, Tokyo, JP;
Abstract
An authenticated encryption deviceincludes: an encryption meanswhich encrypts a plaintext block by inputting, to an encryption function whereby data of a predetermined bit number is output when data of the predetermined bit number is input, a plaintext block of the predetermined bit number constituting the plaintext to be encrypted with a mask value, which is uniquely determined from an adjustment value including an initial vector not overlapping a past value and a secret key, being added; and a computation meanswhich computes, as a checksum, the exclusive OR of corresponding bits of a first bit string, a bit number of which is less than the predetermined bit number, of each of a plurality of plaintext blocks constituting the plaintext.