Patent · US Active

Transition from a Boolean masking to an arithmetic masking

US11386239B2 · kind B2 · utility

1Cited by

4References

18Claims

0Family size

Assignee

GIESECKE+DEVRIENT MOBILE SECURITY GMBH · DE

Inventors

Jürgen Pulkus · Hersbruck, DE
Lars Hoffmann · Birkenfeld, DE

Key dates

Filing date	Feb 28, 2018
Grant date	Jul 12, 2022
Priority date	—
Expiry date	Feb 12, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/046
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method for the transition is provided from a Boolean masking of a value to be kept secret to an additive masking of the value to be kept secret. The value to be kept secret is present in the Boolean masking as a representation masked with a first Boolean mask and a second Boolean mask. A first additive mask and a second additive mask are determined for the value to be kept secret. A first masking transition is executed in which the first Boolean mask is converted into the first additive mask. A second masking transition is executed in which the obfuscation value is converted into an additive correction value, and a third masking transition is executed in which the second Boolean mask is converted into the second additive mask.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.