Method for transmitting data among components of the system electronics of mobile systems, and such components

• US 8,166,303 B2
• Filed: 03/27/2003
• Issued: 04/24/2012
• Est. Priority Date: 03/27/2002
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Fischer, Werner, Kunz, Joachim
• Primary Examiner(s): REVAK, CHRISTOPHER A
• Application Number:
  US10/400,247
• Publication Number:
  US 20030194088A1
• Time in Patent Office: 3,316 Days
• Field of Search: None
• US Class Current: 713/176
• CPC Class Codes: F02D 2041/285 the sensor having a signal processing unit external to the engine control unit
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: F02D 41/28 Interface circuits
• CPC Class Codes: H04K 1/00 Secret communication
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A method for transmitting data among components of the system electronics of mobile systems, where, to increase the security of the information exchange, it is proposed to encrypt the data to be transmitted. To this end, devices for encrypting and/or decrypting data to be transmitted or received are provided in the relevant system electronics components.

Claims

1. A method for transmitting data among components of a system electronics of a mobile system, comprising:

encrypting the data to be transmitted by a transmitting component in real time, wherein the data to be transmitted includes one of a signature and an identifier of the transmitting component;

decrypting the data by a receiving component in real time;

examining the transmitted data for authenticity on the basis of at least one of a) an encryption algorithm and b) the one of the signature and the identifier; and

if the examination of authenticity of the transmitted data turns out to be negative, using suitable replacement data in place of the transmitted data.

2. The method as recited in claim 1, wherein the data to be transmitted are encrypted by a key used by the transmitting component;

and the data are decrypted by a key used by the receiving component.

3. The method as recited in claim 1, wherein:

if the examination of authenticity of the transmitted data turns out to be negative, appropriate information is displayed in addition to the use of the suitable replacement data.

4. The method as recited in claim 1, wherein asymmetrical keys are selected for the transmission of data relevant to security.

5. A system electronics of a mobile system, comprising:

a first component having a transmitting device for transmitting data and an encrypting device for encrypting the data in real time, wherein the encrypting device transmits an identifier of the first component, together with the data; and

a second component having a receiving device for receiving the data and a decrypting device for decrypting the data in real time, wherein the decrypting device is equipped for examining an authenticity of the transmitted data, and wherein if the examination of the authenticity of the transmitted data turns out to be negative, the second component uses suitable replacement data in place of the transmitted data;

wherein the mobile system includes one of a sensor, a control unit, and an actuator.

6. The system electronics as recited in claim 5, wherein:

if the examination of the authenticity of the transmitted data turns out to be negative, appropriate information is displayed in addition to the use of the suitable replacement data.

8. The system electronics as recited in claim 5, wherein the mobile system is a motor vehicle.

9. The system electronics as recited in claim 5, wherein the mobile system is an aircraft.

7. A memory for storing a computer program for causing a transmission of data among components of a system electronics of a mobile system, an execution of the computer program resulting in a performance of:

encrypting the data to be transmitted by a transmitting component in real time, wherein the data to be transmitted includes one of a signature and an identifier of the transmitting component;

decrypting the data by a receiving component in real time;

examining the transmitted data for authenticity on the basis of at least one of a) an encryption algorithm and b) the one of the signature and the identifier; and

if the examination of authenticity of the transmitted data turns out to be negative, using suitable replacement data in place of the transmitted data.