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Related Concept Videos

Design Example: Automobile Ignition System01:14

Design Example: Automobile Ignition System

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Design and Testing of a Computer Security Layer for the LIN Bus.

Felipe Páez1, Héctor Kaschel1

  • 1Electrical Engineering Department, Faculty of Engineering, University of Santiago of Chile (USACH), Av. Ecuador 3519, Estación Central, Santiago 9170124, Chile.

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Summary

This study introduces a novel cybersecurity solution for the Local Interconnect Network (LIN) bus in vehicles. The proposed system combines encryption and authentication to prevent cyberattacks on automotive communication systems.

Keywords:
HMACLINPSoCcomputer securityencryptionin-vehicle networkingmicrocontroller

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Area of Science:

  • Automotive Cybersecurity
  • In-Vehicle Networks
  • Embedded Systems Security

Background:

  • Modern vehicles utilize onboard computers for connectivity, integrating various communication buses like CAN, LIN, and FlexRay.
  • These in-vehicle buses lack inherent security features, rendering them vulnerable to cyberattacks targeting electronic control units.
  • Existing security proposals primarily address CAN and FlexRay, leaving LIN bus security unaddressed.

Purpose of the Study:

  • To research and develop a formal computer security proposal for the LIN bus.
  • To address the vulnerability of LIN communications to cyber threats.
  • To implement real-time security protection for LIN networks.

Main Methods:

  • Investigated security mechanisms tailored to LIN bus particularities.
  • Tested proposed security mechanisms using microcontroller and PSoC hardware.
  • Developed a prototype LIN network with PSoC nodes incorporating security features.

Main Results:

  • A novel combination of encryption and Hash-based Message Authentication Code (HMAC) with replay attack rejection was developed for LIN communications.
  • Promising results demonstrate the feasibility of implementing real-time cybersecurity protection for LIN networks.
  • The prototype successfully integrated security features into the LIN network.

Conclusions:

  • The developed security solution is effective for protecting LIN communications.
  • This research presents a viable approach to enhance automotive cybersecurity for the LIN bus.
  • The implementation shows the potential for secure and reliable in-vehicle networking.