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:
Feb. 23, 2016
Filed:
Feb. 20, 2012
Kyoji Shibutani, Tokyo, JP;
Atsushi Mitsuda, Tokyo, JP;
Toru Akishita, Tokyo, JP;
Takanori Isobe, Tokyo, JP;
Taizo Shirai, Kanagawa, JP;
Harunaga Hiwatari, Kanagawa, JP;
Kyoji Shibutani, Tokyo, JP;
Atsushi Mitsuda, Tokyo, JP;
Toru Akishita, Tokyo, JP;
Takanori Isobe, Tokyo, JP;
Taizo Shirai, Kanagawa, JP;
Harunaga Hiwatari, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An encryption processing device including an encryption processing part configured to divide configuration bits of data to be data processed into plural lines, and to input, and to repeatedly execute data conversion processing applying a round function to each line of data as a round calculation; and a key scheduling part configured to output round keys to a round calculation executing unit in the encryption processing part. The key scheduling part is a replacement type key scheduling part configured to generate plural round keys or round key configuration data by dividing a secret key stored beforehand into plural parts. The plural round keys are output to a round calculation executing unit sequentially executing in the encryption processing part such that a constant sequence is not repeated. The encryption processing configuration has a high level of security and a high level of resistance to repeated key attacks or other attacks.