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:
Mar. 31, 2020
Filed:
Apr. 26, 2017
Applicant:
Nxp B.v., Eindhoven, NL;
Inventors:
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); H04L 9/06 (2006.01); H04L 9/14 (2006.01); H04L 29/06 (2006.01);
U.S. Cl.
CPC ...
H04L 9/3242 (2013.01); H04L 9/0618 (2013.01); H04L 9/0643 (2013.01); H04L 9/14 (2013.01); H04L 63/0428 (2013.01); H04L 2209/125 (2013.01);
Abstract
A method of computing a message authentication code (MAC) for a message having a common part and an independent part using a constrained processor, including: performing a MAC function on the common part of the message using a first secret key to produce a first output; performing a pseudorandom function on the independent part of the message using a second key to produce a second output, wherein the computation time of the pseudorandom function is significantly less than the computation time of the MAC function; and combining the first output and the second output to produce a computed MAC for the message.