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:
Jul. 25, 2017
Filed:
Jan. 19, 2016
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Benoit Chevallier-Mames, Paris, FR;
Mathieu Ciet, Paris, FR;
Thomas Icart, Paris, FR;
Bruno Kindarji, Paris, FR;
Augustin J. Farrugia, Los Altos Hills, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); H04L 9/06 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0637 (2013.01); H04L 9/0631 (2013.01); H04L 9/30 (2013.01); H04L 2209/24 (2013.01);
Abstract
Methods, media, and systems for, in one embodiment, protecting one or more keys in an encryption and/or decryption process can use precomputed values in the process such that at least a portion of the one or more keys is not used or exposed in the process. In one example of a method, internal states of an AES encryption process are saved for use in a counter mode stream cipher operation in which the key used in the AES encryption process is not exposed or used.