Patent · US Active

Method for obtaining emergency device access for field devices

US11809541B2 · kind B2 · utility

0Cited by

4References

10Claims

0Family size

Assignee

Endress+Hauser Conducta GmbH+Co. KG · DE

Inventors

Thomas Alber · Stuttgart, DE
Martin Lohmann · Gerlingen, DE

Key dates

Filing date	Sep 22, 2021
Grant date	Nov 7, 2023
Priority date	—
Expiry date	Apr 8, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/30
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Disclosed is a method for obtaining emergency device access for field devices in process automation technology by means of a security token. The method includes the field device receiving and storing a public key before an emergency occurs; connecting the security token to the field device; sending a challenge from the field device to the security token; calculating a response to the challenge by means of a private key on the security token and sending the response from the security token to the field device; and granting emergency access if the response is correct.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.