Methods and apparatuses for achieving a security function, in particular in the environment of a device and/or installation controller

US11003763B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hans Aschauer · Eferding, AT
• Rainer Falk · Poing, DE
• Kai Fischer · Amsterdam, NL
• Steffen Fries · Baldham, DE
• Markus Heintel · Munich, DE
• Wolfgang Klasen · Ottobrunn, DE
• Axel Pfau · Ettingen, CH

Key dates

• Filing date: Jul 31, 2018
• Grant date: May 11, 2021
• Expiry date: Dec 21, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2209/127
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Provided is a method for achieving a security function for a security control device for controlling a device or an installation, including: a basic control device, and a security module and having the following steps of a) providing at least one first partial secret which is stored in the basic control device, b) providing at least one second partial secret which is stored in the security module, c) combining the at least one first partial secret and the at least one second partial secret in order to achieve the security function, wherein the at least one first partial secret is broken down into sections of a predefinable size and the set of sections is gradually combined with the at least second partial secret by means of a calculation rule, which can be processed within a predefinable period during the execution of the calculation rule according to the size and set.