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. 15, 2025
Filed:
May. 18, 2023
Nxp B.v., Eindhoven, NL;
Olivier Bronchain, Auderghem, BE;
Joost Roland Renes, 's-Hertogenbosch, NL;
Tobias Schneider, Graz, AT;
NXP B.V., Eindhoven, NL;
Abstract
A data processing system and method for norm checking a cryptographic operation for lattice-based cryptography in a processor, the instructions, including: multiplying a first polynomial by a second polynomial to produce a first output, wherein the d arithmetic shares have a modulus q'; securely converting the first output to d Boolean shares; securely subtracting a third polynomial from the first output to produce a second output, wherein the third polynomial is randomly generated and then offset by a first constant parameter; securely adding a first constant based upon a bound check and the first constant parameter to the second output to shift the values of the second output to positive values to produce a third output; and securely adding a second constant based upon the bound check to the third output to produce a carry bit.