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:
Sep. 19, 2023
Filed:
Dec. 11, 2019
Siemens Aktiengesellschaft, Munich, DE;
Rainer Falk, Poing, DE;
Steffen Fries, Baldham, DE;
Abstract
A method for validating a digital user certificate of a user by a checking device is provided. The user certificate is protected by a digital signature with an issuer key of an issuance location which issues the user certificate. The method has the steps of: receiving the user certificate in the checking device, checking the user certificate using a certificate path positive list with at least one valid certificate path which is provided to the checking device by at least one positive path server, and confirming the validity of the user certificate if the issuer key of the user certificate can be traced back to a root certificate according to one of the valid certificate paths of the certificate path positive list. Also provided is a system, a checking device, a user device, a positive path server, and a computer program product which are designed to carry out the method for validating a digital user certificate.