Vehicle Digital Key Memory Module with Unique Identifier Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle authorization management systems face challenges in securely and efficiently managing access and engine-start authorizations due to limited memory space in vehicle control units, leading to synchronization issues and potential security risks from revocation list implementation.
Innovation Solution
A system utilizing a vehicle-based memory module with a key list containing unique identifiers for digital keys, allowing secure allocation and revocation of authorizations through asymmetric encryption and a counter module to manage a limited number of entries, ensuring each identifier is unique and only assigned once.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a revocation list is implemented to prevent unauthorized access, then security is improved, but memory space requirements increase beyond available capacity
Solution Approach 1:
The patent extracts the revocation list from the vehicle control unit and stores it externally on a server or cloud-based authorization service. The vehicle only maintains a minimal local cache of recently revoked keys, while comprehensive revocation information is fetched on-demand or periodically from the external source, dramatically reducing in-vehicle memory requirements while maintaining security
Solution Approach 2:
The patent transitions from a two-dimensional local storage approach (storing all revoked keys locally in limited memory) to a multi-dimensional distributed architecture where revocation lists exist across multiple dimensions: local cache in vehicle, cloud-based master list on server, and synchronized copies in authorization services. This dimensional expansion allows comprehensive security coverage without overwhelming single-point memory constraints
2Ease of operation
If multiple digital keys are allocated to multiple users, then ease of operation is improved, but synchronization issues and security risks increase
Solution Approach 1:
The patent implements a feedback mechanism where the vehicle control unit continuously monitors key usage status and automatically synchronizes with the external authorization service. When any user's key status changes (added, revoked, or modified), the system receives immediate feedback and updates all relevant devices, ensuring consistent authorization states across all users without manual intervention
Solution Approach 2:
The patent performs preliminary synchronization actions by pre-loading revocation lists and authorization status information into local caches before conflicts occur. The system proactively refreshes key status information during idle periods or connection events, so that when authorization decisions are made, the vehicle already has up-to-date information, preventing synchronization issues rather than reacting to them
Data Source
AI summary
A system for managing an authorization for a vehicle includes a vehicle-based memory module, and a communication module. The memory module includes a key list containing a multiplicity of entries for a multiplicity of digital keys, which can be allocated to individual users via a first electronic apparatus. Each digital key represents a vehicle authorization for a user, and each entry in the key list is assigned a unique identifier. The communication module is configured to transfer from the vehicle to the first electronic apparatus at least one identifier assigned to an unallocated entry in the key list.