US 11,539,693 B2Granted

Method for providing random numbers for control units of a vehicle network, and vehicle network for performing said method

AssigneeContinental Teves AG & Co. oHG

InventorsPeter Felber, Bernhard Jungk, Marc Sebastian Patric Stöttinger

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method for providing random numbers for control units communicating via a vehicle network, in which a random number generator having an aggregation component, a storage unit and a distribution component is provided. A plurality of control units each with at least one entropy source are formed. Their raw data are transmitted to the aggregation component via the vehicle network. A quality assurance of the combined raw data from the entropy sources is carried out using only those combined raw data which both occur in a non-deterministic manner and contain a minimum degree of entropy as qualified raw data. The qualified raw data are converted into an aggregated data block by a cryptographic one-way function and securely stored as a random number in the storage unit. The random number stored in the storage unit is transmitted to a control unit via the vehicle network by the distribution component.

Claims20

Dependent claims

A method for providing random numbers for control units communicating via a vehicle network of a vehicle, of the method comprising:

a) providing a random number generator within the vehicle which is connected to the vehicle network for the purpose of transmitting random numbers to the control units within the vehicle, wherein the random number generator has a storage unit,
b) forming the control units each with at least one entropy source such that the vehicle network includes entropy sources, wherein raw data generated by the entropy sources are each generated based on different vehicle signals,
c) providing the raw data from the entropy sources to a control unit of the control units,
d) carrying out, by the control unit, a quality assurance of the raw data from the entropy sources by:
combining the raw data,
performing statistical analysis on the combined raw data from the entropy sources to determine an amount of entropy in the combined raw data from the entropy sources,
determining that the combined raw data are qualified raw data when the combined raw data is determined by the statistical analysis to occur in a non-deterministic manner and contain the amount of entropy that is at least a minimum amount of entropy, and
determining that the combined raw data is rejected raw data when the combined raw data is determined by the statistical analysis to not occur in a non-deterministic manner and not contain the amount of entropy that is the minimum amount of entropy,
e) excluding, by the control unit, the rejected data and post-processing, by the control unit, the qualified raw data by converting them into an aggregated data block by a cryptographic one-way function,
f) securely storing the aggregated data block as a random number in the storage unit, and
g) transmitting a random number stored in the storage unit to at least one other control unit of the control units via the vehicle network.

8 more elements

A vehicle network of a vehicle for providing random numbers, having a plurality of communicating control units, comprising:

a random number generator within the vehicle for the purpose of transmitting random numbers to the control units within the vehicle, wherein the random number generator has an aggregation component, a storage unit, the control units each with at least one entropy source such that the vehicle network includes entropy sources, wherein raw data generated by the entropy sources are each generated based on different vehicle signals,
a control unit of the control units, the control unit configured to:
receive the raw data from the entropy sources,
combine the raw data,
performing statistical analysis on the combined raw data from the entropy sources to determine an amount of entropy in the combined raw data from the entropy sources,
determine that the combined raw data are qualified raw data when the combined raw data is determined by the statistical analysis to occur in a non-deterministic manner and contain the amount of entropy that is at least a minimum amount of entropy,
determine that the combined raw data is rejected raw data when the combined raw data is determined by the statistical analysis to not occur in a non-deterministic manner and not contain the amount of entropy that is the minimum amount of entropy,
exclude the rejected data and post-process the qualified raw data, according to which the latter is converted into an aggregated data block by a cryptographic one-way function and this aggregated data block is stored as a random number in the storage unit, and
transmit a stored random number to at least one other control unit of the control units via the vehicle network.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/347,303Filed 21 Nov 2017
Priority: DE 10 2016 223 695.429 Nov 2016
Published: US 2019/0286421 A119 Sep 2019
Granted: 27 Dec 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04L 63/0876
For authentication of entities: based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or…
G06F 7/58
Methods or arrangements for processing data by operating upon the order or content of the data handled: random or pseudo-random number generators
G06F 7/582
Random or pseudo-random number generators: pseudo-random number generators
G06F 7/588
Random or pseudo-random number generators: random number generators, i.e. based on natural stochastic processes