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. 05, 2019
Filed:
Nov. 25, 2015
Koninklijke Philips N.v., Eindhoven, NL;
Leandro Marin, Eindhoven, NL;
Alphons Antonius Maria Lambertus Bruekers, Nederweert, NL;
Paulus Mathias Hubertus Mechtildis Antonius Gorissen, Eindhoven, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
An electronic calculating device () for performing obfuscated arithmetic in a commutative ring (Z; Z[x]/f(x)) is presented. The calculating device comprising a storage () arranged to store an increment table (T) defined for an increment ring element (1; u), the increment table mapping an input ring element (k=u−u) to an output integer-list (T((k,k))=(l, l)) encoding an output ring element (I=u−u), such that the output ring element equals the increment ring element ring-added to the input ring element (I=k+1). Using the increment table, a ring addition unit () adds a first addition-input integer-list ((a, a)) encoding a first addition-input ring element and a second addition-input integer list ((b, b)) encoding a second addition-input ring element. The device may comprise a ring multiplication unit () also using the increment table.