Dynamic Vehicle Key Generation via Cloud Mediator
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Solution Overview
Problem
Current vehicle keyless entry and startup systems rely on manufacturer-controlled fobs, which are limited in flexibility and security, and do not effectively utilize mobile devices for dynamic key generation and handling.
Innovation Solution
A system that uses a processor to generate and manage new access keys, connecting with user devices via wireless communication, ensuring secure key delivery and storage, and verifying proximity and encrypted keys for vehicle access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a static fob with transponder is used for keyless entry, then the system is simple to implement, but the security is vulnerable to replay attacks and lacks flexibility
Solution Approach 1:
The patent implements dynamic key generation where access keys are continuously regenerated based on vehicle state changes (ignition on/off, door lock/unlock). This dynamic approach prevents replay attacks since each key is valid only for a specific state transition, resolving the security vulnerability of static fobs while maintaining manageable system complexity through event-driven key updates.
Solution Approach 2:
The system introduces a cloud-based key management server as an intermediary between the vehicle and user devices. This mediator handles key generation, distribution, and revocation, allowing the vehicle to use sophisticated security protocols without requiring complex local implementation, thus improving security while keeping device complexity acceptable.
2Reliability
If dynamic key generation is implemented, then security against replay attacks is improved, but key management complexity increases
Solution Approach 1:
The key management system is segmented into multiple components: cloud-based key generation server, vehicle-mounted processor for key validation, and user device for key storage. This segmentation distributes complexity across different systems, allowing each component to handle specific tasks efficiently while maintaining overall security through coordinated operation.
Solution Approach 2:
The system implements automatic key distribution where the vehicle processor automatically generates new keys upon state changes and delivers them to connected user devices without manual intervention. This self-service mechanism reduces operational complexity while maintaining dynamic key generation for security.
3Adaptability or versatility
If manufacturer-controlled fobs are used, then device compatibility is ensured, but flexibility for multi-device access is limited
Solution Approach 1:
The system enables multiple user devices (smartphones, tablets, wearables) to function as vehicle access keys through cloud-based key distribution. Each device type can store and use access keys, providing universal multi-device access while maintaining consistent security validation through the vehicle's processor that verifies keys regardless of source device.
Data Source
AI summary
A system includes a processor configured to generate a new access key, responsive to a vehicle shutdown. The processor is also configured to connect to a previously identified user wireless device. The processor is further configured to deliver the new access key to the user wireless device, responsive to connection to the wireless device and locally store a copy of the new access key in a file designated for reference for a next-access attempt.