Kostengünstige Maskierung für Postquantum Kryptographie

Details

Veröffentlichungs-Nr.

EP4716144

Anmeldetag

11. September 2025

Veröffentlichung

25. März 2026

Rechtsraum

EP

Abstract

Devices, systems, and methods for secure modular addition and subtraction are provided. A modular adder and subtractor circuit with masking circuit includes an arithmetic to Boolean (A2B) conversion operator configured to convert (i) a second sum and (ii) a value determined based on a first sum, to Boolean resulting in first and second Boolean values, a shifter configured to (i) make a most significant bit of the first Boolean value a least significant bit resulting in a shifted first Boolean value and (ii) make the most significant bit of the second Boolean value a least significant bit resulting in a shifted second Boolean value, and a Boolean to arithmetic (B2A) conversion operator, configured to convert a representation of the shifted first Boolean value and a representation of the shifted second Boolean value to arithmetic representation resulting in first and second arithmetic values, respectively.

Anmelder

Firma

Microsoft Technology Licensing, LLC

Land

🇺🇸 USA