The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2023
Filed:
Sep. 22, 2021
Applicant:
Endress+hauser Conducta Gmbh+co. KG, Gerlingen, DE;
Inventors:
Thomas Alber, Stuttgart, DE;
Martin Lohmann, Gerlingen, DE;
Assignee:
Endress+Hauser Conducta GmbH+Co. KG, Gerlingen, DE;
Primary Examiner:
Int. Cl.
CPC ...
G06F 21/34 (2013.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01);
U.S. Cl.
CPC ...
G06F 21/34 (2013.01); H04L 9/088 (2013.01); H04L 9/30 (2013.01);
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.