Verfahren und System zur Erzeugung eines Quantengesicherten Verschlüsselungsschlüssels

Details

Veröffentlichungs-Nr.

EP4068677

Aktenzeichen

EP21166279

Anmeldetag

31. März 2021

Veröffentlichung

7. Juni 2023

Erteilung

7. Juni 2023

Rechtsraum

EP

IPC

H04L9/08

Abstract

The present invention refers to a method for creating an encryption key (K*<E2E>) comprising a preparation step and a subsequent key agreement step, wherein in the preparation step, a first QKD device (A1) at a first location (A) and a second QKD device (B2) at a second location (B) distant from the first location (A) together create a quantum secured key (K<QKD>) according to a QKD protocol communicating via a first quantum channel (110) and a second quantum channel (120), respectively, with at least one common intermediate quantum node (TN), a first encryption device (ENC-A) at the first location (A) and a second encryption device (ENC-B) at the second location (B) together create a symmetrically encrypted channel (200) between the first location (A) and the second location (B), using the quantum secured key, K<QKD>, wherein, in the key agreement step, a first key agreement device (PQC-A) at the first location (A) and a second key agreement device (PQC-B) at the second location (B) together create an encryption key (K*<E2E>) via the symmetrically encrypted channel (200), using an asymmetric key exchange procedure operating with respective private / public key pairs according to a public-key protocol, wherein key material to be exchanged for creating the encryption key (K*<E2E>) is transferred via the symmetrically encrypted channel (200) between the first location (A) and the second location (B). The present invention also refers to a respective system.

Anmelder

Firma

Deutsche Telekom AG

Land

🇩🇪 Deutschland

Fachgebiete