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:
May. 03, 2022
Filed:
Aug. 26, 2020
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Alexander Tschache, Wolfsburg, DE;
Timo Winkelvos, Sickte, DE;
VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg, DE;
Abstract
The invention relates to a method for generating cryptographic keys according to a key derivation function model. An embodiment includes the following steps: defining a master key for different models of a product type from a manufacturer; defining a set of key derivation parameters for the key derivation function model; determining the key derivation parameters for the model for which a cryptographic key is to be derived; deriving a single cryptographic key or a set of cryptographic keys from the master key according to the key derivation function model taking into account the key derivation parameters, wherein the step of defining a set of key derivation parameters comprises at least the following parameters: key type identification and key type learning counter.