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. 20, 2018
Filed:
Aug. 14, 2014
Applicant:
Synopsys, Inc., Mountain View, CA (US);
Inventors:
A. A. Jithra Adikari, Ottawa, CA;
Michael Borza, Ottawa, CA;
Assignee:
Synopsys, Inc., Mountain View, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); G06F 21/00 (2013.01); H04L 9/06 (2006.01); G09C 1/00 (2006.01); H04L 9/32 (2006.01); G06F 21/72 (2013.01);
U.S. Cl.
CPC ...
H04L 9/0631 (2013.01); G09C 1/00 (2013.01); H04L 9/32 (2013.01); H04L 2209/30 (2013.01);
Abstract
A method of improving the efficiency of an encryption/decryption process implementing the NIST FIPS 197 standard which includes a substitution box (S-box) and an inverse substitution (inverse S-box), comprises concatenating the S-box and inverse S-box to form a combined lookup table, and folding the concatenated table to generate a folded lookup table. The folded lookup table may be indexed for an encryption operation and for a decryption operation using a signal indicative of whether encryption or decryption is used.