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:
Aug. 11, 2026
Filed:
Dec. 01, 2021
Basf SE, Ludwigshafen am Rhein, DE;
Lothar Seidemann, Ludwigshafen am Rhein, DE;
Holger Kai Peter Jelich, Ludwigshafen am Rhein, DE;
BASF SE, Ludwigshafen am Rhein, DE;
Abstract
Disclosed here is a system and method to distribute symmetric encryption keys between respective nodes of a communication system. A node comprises a printing device that generates session key information or an encryption key based on changing printer control setting information and printer job information of the printing device. Operations comprise providing an initial session key information, which is used to encrypt an initial session package that includes first session key information for respective nodes. A node further generates, based on a second printer control setting and a second printer job setting, second session key information and sends a message that is encrypted with the first session key information. The message includes the second session key information. Respective session key information represents a unique identifier based on printer control setting information and printer job information of a printing device in a node as a physical unclonable function.