Vehicle Messaging Authentication via Infrastructure Intermediary
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Solution Overview
Problem
Existing vehicle messaging techniques lack efficient and reliable methods to quickly authenticate vehicle-to-vehicle messages and initiate protective actions, often resulting in delayed or inappropriate responses to potential hazards.
Innovation Solution
A method that combines vehicle-to-vehicle and vehicle-to-infrastructure messaging, using low-latency vehicle-to-vehicle links for initial warnings and more reliable infrastructure-to-vehicle links for authentication, allowing preparatory actions to be taken based on the number and sequence of messages received, and ceasing actions if authentication is not confirmed within a timeframe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If vehicle-to-vehicle messaging is used for rapid hazard warning, then response time is reduced, but message authenticity cannot be confirmed immediately
Solution Approach 1:
The system performs preliminary authentication of vehicle messages through infrastructure nodes before the messages are fully processed. The infrastructure node pre- validates the authenticity of vehicle-to-vehicle messages using digital certificates and public key infrastructure, so that receiving vehicles can quickly verify message authenticity without delaying the hazard warning response.
Solution Approach 2:
The infrastructure node acts as an intermediary between sending and receiving vehicles. It receives messages from the sending vehicle, authenticates them using digital certificates, and then forwards the authenticated messages to receiving vehicles. This intermediary role enables rapid message delivery while ensuring authenticity through centralized verification.
2Reliability
If infrastructure-to-vehicle messaging is used for message authentication, then message reliability is improved, but response time increases
Solution Approach 1:
The infrastructure node performs authentication in advance by maintaining a cache of valid digital certificates and public keys. When a vehicle message arrives, the node quickly verifies the sender's certificate against the cached credentials before forwarding the message, enabling rapid authentication without waiting for lengthy verification processes.
Solution Approach 2:
The system dynamically adjusts the authentication process based on the message type and urgency. For high-priority hazard warnings, the system uses pre-validated certificate caches for faster verification. For less urgent messages, more thorough authentication processes can be applied. This dynamic approach balances speed and reliability based on real-time needs.
3Reliability
If multiple vehicle-to-vehicle messages are required for hazard confirmation, then false alarms are reduced, but response time is delayed
Solution Approach 1:
The system implements a partial verification approach where receiving vehicles can take preliminary protective actions based on a single authenticated message, while continuing to monitor for additional corroborating messages. This allows the system to respond quickly to potential hazards while still gathering additional information to reduce false alarms, rather than waiting for complete confirmation before acting.
Solution Approach 2:
The infrastructure node performs preliminary filtering and validation of incoming messages before they reach receiving vehicles. It identifies messages that meet authentication criteria and prioritizes them for immediate delivery, allowing the system to respond to confirmed hazards quickly while still processing additional messages for comprehensive verification.
Data Source
Figure 1
AI summary
A vehicle messaging transmission method, a vehicle messaging transmitter, a vehicle messaging reception method, a vehicle messaging receiver, an infrastructure node method, and infrastructure node and computer program products are disclosed. The vehicle messaging transmission method, comprises: detecting a vehicle event; and transmitting both a vehicle-to-vehicle message over a vehicle-to-vehicle radio link, the vehicle-to-vehicle message identifying the vehicle event and a vehicle-to-infrastructure message over a vehicle-to-infrastructure radio link, the vehicle-to-infrastructure message identifying the vehicle event. In this way, rather than periodically transmitting location messages, instead messages are only transmitted when a particular event occurs. This helps to reduce the volume of messages since the messages are only transmitted when an event occurs. Also, transmitting a vehicle-to-vehicle message enables messages to be transmitted quickly, with reduced latency. Furthermore, because the messages are only sent when an event occurs, privacy and security concerns are reduced. As will be explained in more detail below, transmitting a vehicle-to-vehicle message enables other vehicles which receive the message to receive that message quickly and to respond rapidly to the event, whilst the vehicle-to-infrastructure message can be used to authenticate the validity of the vehicle-to-vehicle message and provide additional assurance to the receiving vehicle that the message is genuine.