IoV RSU Targeted Information Delivery via CA Key Encryption
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Solution Overview
Problem
Current communication technologies in the Internet of Vehicles (IoV) lack the ability to selectively push information to vehicles with specific attributes, resulting in broadcast information being received by all vehicles, which is inefficient and does not allow for targeted services.
Innovation Solution
A communication method that involves a terminal device, a road side unit (RSU), and a server, where the RSU encrypts information using a communication key provided by a certificate authority (CA) server, ensuring that only vehicles with the appropriate identity and permission can decrypt and receive the information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the RSU releases information in a broadcast manner, then all vehicles can receive the information, but it is difficult to achieve the objective that only a specific target vehicle can receive the information
Solution Approach 1:
The patent applies local quality by transitioning from uniform broadcast to targeted delivery. The system determines vehicle attributes (e.g., payment status, vehicle type) and selectively distributes information based on these local characteristics. Only vehicles meeting specific criteria receive encrypted information, while others receive nothing, achieving differentiated service quality based on vehicle attributes.
Solution Approach 2:
The patent introduces a certificate authority (CA) server as an intermediary between the RSU and vehicles. The CA server issues digital certificates and manages communication keys, acting as a mediator that verifies vehicle identities and controls information distribution. This intermediary enables secure authentication and key management, allowing the system to distinguish authorized from unauthorized vehicles.
2Device complexity
If the RSU deploys only at ETC locations for vehicle recognition, then the system complexity is reduced, but the ability to provide targeted information services is limited
Solution Approach 1:
The patent applies universality by enabling RSUs to perform multiple functions: traditional vehicle recognition at ETC locations plus targeted information broadcasting to specific vehicles. The system maintains compatibility with existing ETC infrastructure while adding new capabilities for attribute-based information delivery, making the RSU a multi-functional device that serves both recognition and targeted service purposes.
Solution Approach 2:
The patent applies preliminary action by having vehicles obtain digital certificates and communication keys from the CA server before receiving information. The system pre-authenticates vehicles and establishes their identities in advance, so that when information needs to be broadcast, the RSU can immediately identify which vehicles are authorized without requiring complex real-time verification procedures.
3Loss of information
If the system provides differentiated services for vehicles with specific attributes, then information relevance is improved, but the system complexity increases
Solution Approach 1:
The patent uses the CA server as an intermediary to manage the complexity of authentication and key distribution. The CA server handles certificate issuance, key management, and vehicle authentication centrally, reducing the burden on individual RSUs and vehicles. This centralized approach simplifies the overall system architecture while enabling differentiated services.
Solution Approach 2:
The patent applies parameter changes by using digital certificates and communication keys as controllable parameters to differentiate between authorized and unauthorized vehicles. The system changes the state of information from unencrypted (public) to encrypted (private) based on vehicle attributes, using cryptographic parameters to enforce access control and enable targeted information delivery.
Data Source
AI summary
The present disclosure provides example terminal devices, road side units, and servers. One example terminal device performs operations including sending certificate request information to a certificate authority server, where the certificate request information includes identity information of the terminal device. A communication key sent by the certificate authority server is received by the terminal device. Encrypted information that is sent by a road side unit is received by the terminal device, where the encrypted information is information encrypted by using the communication key. The encrypted broadcast information is decrypted by the terminal device by using the communication key.