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:
Jun. 18, 2019
Filed:
Sep. 28, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Yusuke Naito, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A message authenticator generating apparatus (), for each integer i, taking as input a key K and a value m'[i] which is generated from a message M, calculates a value c[i] by a block cipher E. The message authenticator generating apparatus (), taking as input the value c[i] for each integer i, calculates a value w[], a value w[], and a value w[] each maintaining the randomness of the value c[i]. The message authenticator generating apparatus (), taking as input the value w[] and the key K, calculates a value K′ by a function e which is a substitution function if the key K is fixed, taking as input the value w[] and the value K′, calculates a value c by a block cipher E, and taking as input the value w[] and the value c, calculates an authenticator T by a function d which is a substitution function if the value w[] is fixed.