Patent · US Active

Method and device for generating cryptographic keys according to a key derivation function model and vehicle

US11323253B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Alexander Tschache · Wolfsburg, DE
Timo Winkelvos · Sickte, DE

Key dates

Filing date	Aug 26, 2020
Grant date	May 3, 2022
Priority date	—
Expiry date	Sep 1, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/84
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.