Scp Sitzungsschlüsseldiversifizierung

Details

Veröffentlichungs-Nr.

EP4718900

Anmeldetag

27. September 2024

Veröffentlichung

1. April 2026

Rechtsraum

EP

IPC

H04W12/041, H04W12/30

Abstract

A method in a processing entity, for calculating, in a Security Domain, SD, included in said processing entity, related to an SCPllc Secure Channel between an Off-Card Entity, OCE, and a Security Domain, SD, SCPllc session keys, the calculating made based on:a) an SD static public key PK.SD.ECKA;b) an OCE static secret key SK.OCE.ECKA;c) an OCE ephemeral secret key eSK.OCE.ECKA; andd) key diversification data;the key diversification data being used to effect that more than one SCPllc session keys calculated with the same keys a), b) and c) are different from each other;characterized in thatthe SCPllc session keys are calculated for different Card Group IDs and/or different Hosts, in that the key diversification data comprise the following SCPllc parameters:- HostID (Tag 84); and- Card Group ID (e.g. Subject Identifier (Tag 5F20) from CERT.SD.ECKA certificate).

Anmelder

Firma

Giesecke+Devrient Mobile Security Germany GmbH

Land

🇩🇪 Deutschland