Automotive Keyless Entry Security Against Relay Attacks
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Solution Overview
Problem
Current keyless entry and engine ignition systems in vehicles lack effective security measures to prevent unauthorized access and ignition, particularly vulnerable to relay attacks.
Innovation Solution
An automotive entry and engine ignition control system that utilizes a short-range wireless communications system, a human-machine interface, and a body computer to implement a Key Lock Feature, allowing intuitive and secure deactivation of keyless entry and ignition functions via a remote control, with optional PIN authentication and mechanical backup for added security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If keyless entry and ignition systems are implemented, then ease of operation is improved, but security against unauthorized access and relay attacks deteriorates
Solution Approach 1:
The system performs preliminary authentication actions by checking signal characteristics, timing patterns, and cryptographic validation before granting access. The body computer evaluates multiple parameters in advance to determine whether the remote control is legitimate, preventing unauthorized access before it can occur.
Solution Approach 2:
The system implements feedback mechanisms by monitoring communication between the remote control and body computer, analyzing signal responses, and adjusting authentication decisions based on observed patterns. This allows the system to detect relay attacks and unauthorized access attempts by comparing expected versus actual signal behavior.
2Object-affected harmful factors
If additional security measures are added, then security level is improved, but device complexity increases
Solution Approach 1:
The body computer serves multiple functions: it manages keyless entry, processes ignition commands, validates remote controls, detects relay attacks, and controls door locks. By consolidating these security-related functions into a single control unit, the system achieves high security without proportionally increasing overall device complexity.
Solution Approach 2:
The patent introduces an intermediary authentication protocol between the remote control and body computer that validates signals without requiring additional physical hardware. This software-based intermediary layer provides enhanced security while maintaining system simplicity.
3Reliability
If remote control authentication is enhanced, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The remote control and body computer perform self-authentication through cryptographic verification and signal characteristic analysis. The system automatically validates each communication attempt without requiring user intervention or additional authentication steps, maintaining ease of operation while enhancing reliability.
Data Source
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AI summary
Automotive entry and engine ignition control designed to allow keyless entry to the motor vehicle and key or keyless ignition of a motor vehicle engine only by a rightful holder of an electronic key of the motor vehicle. To this end, the automotive entry and engine ignition control is designed to cause the keyless entry to the motor vehicle and the key or keyless ignition of the motor vehicle engine to be deactivable by an electronic key of the motor vehicle when the motor vehicle doors are centrally locked and, then, to be re-activable by a rightful holder of an electronic key of the motor vehicle when the motor vehicle doors are centrally unlocked, by inserting, via control buttons of a remote control of the electronic key, an (alpha) numeric identification code stored in an enablement phase during which the automotive entry and engine ignition control has been enabled.