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:
Jan. 31, 2017
Filed:
Mar. 27, 2015
Applicant:
Stmicroelectronics (Rousset) Sas, Rousset, FR;
Inventors:
Pierre-Yvan Liardet, Peynier, FR;
Yannick Teglia, Belcodene, FR;
Jerome Tournemille, Pourrieres, FR;
Assignee:
STMicroelectronics (Rousset) SAS, Rousset, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/75 (2013.01); G06F 21/72 (2013.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
G06F 21/75 (2013.01); G06F 21/72 (2013.01); H04L 9/004 (2013.01); G06F 2221/2105 (2013.01);
Abstract
A device includes one or more registers and circuitry. The circuitry subjects a key having a number of bits to a first function which takes a selection value into account, generating a result having a number of bits which is twice the number of bits of the key, and stores the result in the one or more registers. In response to a call for the key, the circuitry subjects the result stored in the one or more registers to a second function which takes the selection value into account to generate a response having a same value as the key.