Verfahren und System zur Erkennung von Fehlerinjektionsangriffen in einer Digitalen Signatur

Details

Veröffentlichungs-Nr.

EP4811715

Anmeldetag

18. März 2025

Veröffentlichung

23. September 2026

Rechtsraum

EP

IPC

H04L9/00

Abstract

The present disclosure describes a method and a system for detecting fault injection attacks in a digital signature. The method comprises the steps of: initiating a first counter configured to count a number of generations of digital signature candidates, initiating a second counter configured to count a number of digital signature candidates which fail security checks, incrementing the first counter each time that a digital signature candidate is generated, selecting a size β and parsing the first counter in block intervals of said size β, performing at least one security check on each digital signature candidate generated, incrementing the second counter in response to a digital signature candidate failing at least one security check, and in response to the first counter being an integer multiple of β: assigning to the last completed block interval of said size β a third counter, such third counter configured to count the number of failed security checks in the last completed block interval, assigning to the last completed block interval of said size β a third counter, such third counter configured to count the number of failed security checks in the last completed block interval, comparing the third counter with a criterion based at least on a probabilistic threshold and on said size β. In response to the third counter not fulfilling the criterion the method detects that at least one fault injection attack has been performed.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

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