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Motor vehicle control unit having a cryptographic device

A technology of control equipment and cryptographic devices, which is applied in the direction of secure communication devices, computer security devices, and the usage of multiple keys/algorithms, and can solve problems such as unusable control equipment and threats to the safety of motor vehicle users.

Inactive Publication Date: 2013-12-11
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is desirable that control equipment cannot be changed between vehicles by unauthorized persons
Therefore, it is desirable on the one hand that stolen control devices cannot be used in other motor vehicles
On the other hand, the installation of used control equipment into motor vehicles by untrained personnel may endanger the safety of motor vehicle users

Method used

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  • Motor vehicle control unit having a cryptographic device

Examples

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Effect test

Embodiment Construction

[0021] The drawing shows a control unit 10 which is installed in a passenger vehicle (not shown in detail). In relation to the exemplary embodiment on which the figures are based, it is assumed that the control device is the navigation device of the passenger car. However, it can also generally be a control device that provides any other functionality than navigation assistance functions.

[0022] The route calculation required for the navigation assistance function and the driving instructions generated by the digital indicator of the navigation device (not shown) are controlled by the control device 12 . The control device 12 is coupled to an encryption device 14 of the control device 10 . The output of encryption device 14 may be transmitted to compression device 16 . The output value 18 of the compression device 16 can be transmitted to the control device 12 .

[0023] The control device 12 , the encryption device 14 and the compression device 16 can each be a circuit a...

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PUM

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Abstract

Control units (10) for motor vehicles are not intended to be interchanged between individual vehicles by unauthorised persons. For a motor vehicle it should therefore be rendered possible for individual functionalities of a control unit (10) to be enabled only for a specific motor vehicle. For that purpose, a first cryptographic key (26) and a second cryptographic key (30) are stored in a control unit (10) according to the invention. A cryptographic device (14) is designed to encrypt a first message (38) first of all with one of the cryptographic keys (26), subsequently to encrypt a result of the encryption with the other cryptographic key (30), and finally to provide a result of the second encryption as a third cryptographic key (34) for an encryption or decryption of a further message (24). The invention also relates to a method for configuring a control unit in a motor vehicle and to a motor vehicle.

Description

technical field [0001] The invention relates to a control unit for a motor vehicle, in which cryptographic means for encrypting and / or decrypting messages are provided. The invention also relates to a motor vehicle having such a control device and a method for configuring the control device in a motor vehicle. Background technique [0002] In motor vehicles, functions such as engine control, navigation assistance or telephone are provided by separate control devices. It is desirable that the control device cannot be changed between motor vehicles by unauthorized personnel. Therefore, on the one hand it is desirable that a stolen control device cannot be used in another motor vehicle. On the other hand, the installation of used control devices into the motor vehicle by untrained personnel can endanger the safety of motor vehicle users. [0003] An identification system for a control unit in a motor vehicle is known from DE 10 2006 040 228 A1, by means of which it can be ch...

Claims

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Application Information

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IPC IPC(8): H04L9/08
CPCH04L9/14H04L2209/84H04L9/0866G06F21/445H04L9/0816
Inventor S·盖格尔I·莱登德克尔C·施马尔
Owner AUDI AG
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