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. 10, 2014
Filed:
Apr. 09, 2012
Tze Lei Poo, Sunnyvale, CA (US);
Heng Tang, Sunnyvale, CA (US);
Siu-hung Fred AU, Fremont, CA (US);
Gregory Burd, San Jose, CA (US);
Tze Lei Poo, Sunnyvale, CA (US);
Heng Tang, Sunnyvale, CA (US);
Siu-Hung Fred Au, Fremont, CA (US);
Gregory Burd, San Jose, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
A cryptographic device includes a first state module, a key addition module, a byte substitution module, and a column mixing module. The first state module stores a first data block. The key addition module adds a key to the first data block to generate a second data block. The byte substitution module replaces each byte of the second data block to generate a third data block. The byte substitution module includes a first byte substitution sub-module that generates an intermediate data block in response to the second data block, a pipeline register that stores the intermediate data block, and a second byte substitution sub-module that generates the third data block in response to the intermediate data block. The column mixing module generates a fourth data block based on the third data block and provides the fourth data block to the first state module for storage.