C-V2X Toll Payment Encryption via RSU Intermediary
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Solution Overview
Problem
The secure exchange of personal information over cellular-vehicle-to-everything (C-V2X) communication for toll payment transactions faces challenges in ensuring the confidentiality and integrity of sensitive data, such as credit card numbers and vehicle identification numbers, during broadcast communications.
Innovation Solution
A system and method utilizing public key encryption, where a telematics control unit in a vehicle broadcasts a toll usage message encrypted with the public keys of a toll service provider and a toll charger cloud, and decrypts a toll receipt message using its corresponding private key, ensuring secure communication through vehicle-to-everything (V2X) protocols like PC5 and Uu.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If personal information is transmitted over C-V2X communication for toll payment, then the convenience of toll payment is improved, but the security and confidentiality of sensitive data deteriorates
Solution Approach 1:
The patent introduces a roadside unit (RSU) as an intermediary component that facilitates secure communication between the vehicle's telematics control unit and the toll charging system. The RSU acts as a trusted mediator that receives encrypted messages from the vehicle, forwards them to the toll charger cloud, and relays responses back, thereby enabling convenient toll payment while maintaining security through controlled communication channels.
Solution Approach 2:
The patent transforms the security parameter by implementing multi-layer encryption with different key types. Personal information is encrypted with the toll service provider's public key, while the toll usage message itself is encrypted with the toll charger cloud's public key. This parameter change in encryption approach ensures that sensitive data remains confidential during transmission while still enabling automated toll payment.
2Object-affected harmful factors
If public key encryption is used to secure toll messages, then the security of personal information is improved, but the device complexity increases
Solution Approach 1:
The patent segments the encryption system into distinct functional components with specific responsibilities. The telematics control unit handles message generation and initial encryption, the roadside unit manages message forwarding and key distribution, and the toll charger cloud performs decryption and processing. This segmentation allows each component to implement only the necessary encryption functions, reducing overall system complexity while maintaining security.
Solution Approach 2:
The roadside unit serves as an intermediary that simplifies the encryption system by pre-distributing public keys to vehicles and managing the communication protocol. Instead of requiring the vehicle to directly manage complex key exchanges with the toll charger cloud, the RSU mediates this process, making the encryption system more manageable and less complex for the vehicle's telematics control unit.
3Reliability
If multiple encryption keys are used in toll messages, then the integrity of communication is improved, but the message size increases
Solution Approach 1:
The patent extracts and separates different types of information into different message structures. Public keys are extracted and placed in toll advertisement messages (TAM) that are broadcast separately, while the toll usage message (TUM) contains only the necessary encrypted data. This extraction reduces the size of individual transaction messages while maintaining the integrity provided by multiple encryption keys.
Solution Approach 2:
The patent performs preliminary distribution of public keys through toll advertisement messages (TAM) before the actual toll transaction. By pre-distributing the encryption keys in advance, the system avoids needing to include all key material in every toll message, thereby reducing message size while maintaining communication integrity through the预先 established key infrastructure.
Data Source
AI summary
A toll advertisement message (TAM) broadcast from a roadside unit of a roadway is received. The TAM may include a public key of a toll charger cloud. Responsive to receipt of the TAM, a tolling usage message (TUM) is sent. The TUM may include information encrypted with a public key of a toll service provider, information encrypted with the public key of the toll charger cloud, and a public key of the telematics control unit. Responsive to broadcast of the TUM, a toll usage message acknowledgement (TUM-ACK message. A toll receipt message (TRM) is also received. The TRM is encrypted with the public key of the telematics control unit. The TRM is decrypted using a private key of the telematics control unit corresponding to the public key of the telematics control unit.