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:
Aug. 30, 2005
Filed:
Jun. 08, 2001
Nhu-ha Yup, Phoenix, AZ (US);
Satish N. Anand, Chandler, AZ (US);
Nhu-Ha Yup, Phoenix, AZ (US);
Satish N. Anand, Chandler, AZ (US);
Corrent Corporation, Tempe, AZ (US);
Abstract
A circuit includes a single circuit portion for implementing the Advanced Encryption Standard (AES) block cipher algorithm in a system having a plurality of channels. The circuit portion includes a circuit for individually generating, on the fly, the round keys used during each round of the AES block cipher algorithm. The circuit portion also includes shared logic circuits that implement the transformations used to encrypt and decrypt data blocks according to the AES block cipher. The single circuit portion encrypts or decrypts data blocks from each of the plurality of system channels in turn, in round-robin fashion. The circuit portion also includes a circuit for determining S-box values for the AES block cipher algorithm. The circuit additionally implements an efficient method for generating round keys on the fly for the AES block cipher decryption process.