Homomorphe Berechnung eines Externen, durch einen Morphismus Parametisierten Produkts und Bootstrapping-Verfahren

Details

Veröffentlichungs-Nr.

EP4749976

Anmeldetag

22. November 2024

Veröffentlichung

27. Mai 2026

Rechtsraum

EP

IPC

H04L9/00, H04L9/30

Abstract

Some embodiments are directed to a cryptographic method that includes - obtaining (310) a first plaintext encrypted according to a main encryption, and a second plaintext encrypted according to a further auxiliary encryption, the first plaintext and the second plaintext being encrypted according to the same key (sk), and - applying (320) a further external product to the first plaintext encrypted according to the main encryption and to the second plaintext encrypted according to the further auxiliary encryption to obtain an encryption of the product of a morphism applied to the first plaintext and of the second plaintext according to the same key (sk).

Anmelder

Firma

Zama SAS

Land

🇫🇷 Frankreich

Fachgebiete