Digital Vehicle Key Pairing for Secure Offline Personalization
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Solution Overview
Problem
Conventional vehicle personalization systems are limited in their ability to transfer personalized settings between vehicles and lack secure, efficient methods for digital key programming, especially in offline scenarios, and do not allow for user-specific control over vehicle settings.
Innovation Solution
A communication system that includes a network transceiver and controller for pre-provisioning vehicles with pairing password verifiers and providing end-to-end secure communication using timestamps, unique vehicle IDs, and random numbers to facilitate digital key programming offline, and manages personalized user settings across multiple vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital key programming requires connection to secure servers, then security is improved, but usability in offline scenarios deteriorates
Solution Approach 1:
The system performs preliminary provisioning of the vehicle with cryptographic credentials and security parameters before offline operations are needed. The vehicle is pre-configured with secure storage capabilities and cryptographic keys during manufacturing or initial setup, enabling it to independently perform digital key programming without real-time server connection while maintaining security through pre-established cryptographic protocols
2Reliability
If standard security protocols are used during digital key programming, then security is improved, but vulnerability to hacking deteriorates
Solution Approach 1:
The system changes cryptographic parameters dynamically during the digital key programming process. It uses ephemeral keys, random nonces, and time-varying authentication tokens that change with each programming session. The vehicle and mobile device engage in mutual authentication using challenge-response protocols with randomly generated challenges, making each programming session unique and resistant to replay attacks and hacking attempts
3Reliability
If personalized vehicle settings are stored locally in one vehicle, then data security is improved, but transferability to other vehicles deteriorates
Solution Approach 1:
The system introduces a secure cloud-based server as an intermediary for storing and managing personalized vehicle settings. The server encrypts settings data with vehicle-specific keys and stores them in a secure database. When a user needs to transfer settings to another vehicle, the server securely transmits the encrypted settings to the new vehicle, which decrypts them using its own cryptographic credentials. This mediator approach enables transferability while maintaining security through end-to-end encryption
4Reliability
If digital key programming requires server connection, then programming reliability is improved, but programming speed in offline scenarios deteriorates
Solution Approach 1:
The system segments the digital key programming process into two independent phases: a secure credential verification phase that can be performed offline using pre-provisioned security materials, and an optional settings synchronization phase that can occur when online. The critical key programming operations complete independently using locally stored cryptographic credentials, while non-critical settings can be synced later when server connectivity is available, thereby improving overall programming speed without sacrificing reliability
Data Source
AI summary
A communication system for digital key pairing of a vehicle includes a network transceiver configured for communication via one or more networks with at least one secure server, and a controller. The controller is configured to pre-provision the vehicle with pairing password verifiers for digital key programming to support digital key programming when the vehicle is offline with the at least one secure server, and/or provide end-to-end secure communication between the controller and the at least one secure server by generating and utilizing (i) at least one timestamp, (ii) at least one unique vehicle ID, and (iii) at least one random number in messages communicated between the controller and the at least one secure server.