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. 16, 2024
Filed:
Jun. 15, 2022
Mitsubishi Electric Corporation, Tokyo, JP;
Yusuke Naito, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A division unit () divides a plaintext M every b bits from a beginning, thereby generating b-bit values M, . . . , Mand a value Mhaving 1 or more bits to b or less bits. An Scalculation unit () assigns a b-bit value Hto a value M, and for each integer i of i=1, . . . , m in an ascending order, takes a value Mas input to an encryption function E, thereby calculating a value S(i), and calculates a value Cfrom the value S(i) and a value M. An Scalculation unit () assigns an r-bit value Hto a value S(0), and for each integer i of i=1, . . . , m in an ascending order, calculates a value S(i) from the value S(i) and from a value S(i−1). A ciphertext generation unit () generates a ciphertext C from a value Cfor each integer i of i=1, . . . , m. An authenticator generation unit () generates a (b+r)-bit authenticator T by using a value S(m) and a value S(m).