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. 09, 2025
Filed:
Dec. 29, 2023
Infineon Technologies Ag, Neubiberg, DE;
Alexander Zeh, Munich, DE;
Kenneth William Tindell, Bury St. Edmunds, GB;
Infineon Technologies AG, Neubiberg, DE;
Abstract
The described techniques address issues to achieve key agreement without the need to exchange separate key agreement messages and, consequently, meets the stringent starting time requirements for real-time control systems. This is achieved using a group-wide key counter, with each node storing the latest value of this counter that was observed via the last received secured message. This counter value increases monotonically, and nodes maintain synchronization by transmitting this counter value (or a representation of the counter value) in each secured message. The use of key counters may be extended to guard against weak replay attacks via the implementation of a live membership tracking solution, which defines one or more membership groups. Each node within a membership group may request, or 'challenge' other nodes with the same membership group at any time to verify their online status, and this online status may be maintained over time.