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:
Sep. 11, 2012
Filed:
May. 26, 2008
Kaoru Yokota, Hyogo, JP;
Yuusaku Ohta, Osaka, JP;
Kaoru Yokota, Hyogo, JP;
Yuusaku Ohta, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An encryption circuit is provided which generates encrypted text from plain text using a key. The encryption circuit includes a randomized 8-bit inverse element calculation circuit which receives randomized input data that is obtained by adding, to input data on which predetermined processing is performed with the key, a predetermined input mask value determined depending on a random number, and which generates randomized output data that is obtained by adding, to an inverse element of the input data, an output mask value that is an inverse element of the input mask value, wherein the encryption circuit generates the encrypted text from the generated randomized output data.