Digital Key Chain Attestation Package Filtering
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Solution Overview
Problem
The existing digital vehicle key access control systems face inefficiencies due to the need to transmit a chain of attestation packages, which increases data volume and transmission time, causing inconvenience to users.
Innovation Solution
A method that reduces the data volume by removing redundant attestation packages from the chain, utilizing a tracking service to determine which keys have already been authenticated, and providing a tracking response with only the necessary attestation packages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the complete chain of attestation packages is transmitted for authentication, then the security and validity of the digital key can be verified, but the data transmission time increases significantly
Solution Approach 1:
The tracking service performs preliminary authentication of keys in the chain before the vehicle needs to verify them. When a key is first added to the chain, the tracking service authenticates it and stores the authentication status. This preliminary action eliminates the need for the vehicle to re-authenticate already-verified keys, significantly reducing transmission time while maintaining security.
Solution Approach 2:
The patent extracts only the necessary portion of the attestation package chain that has not yet been authenticated. Instead of transmitting the entire chain from the root key, the system identifies and transmits only the subset of attestation packages that contain new authentication information, reducing data volume while preserving verification integrity.
2Reliability
If all attestation packages are transmitted to ensure complete verification, then the authentication completeness is maintained, but the data volume increases multiple times compared to the digital key size
Solution Approach 1:
The system extracts and transmits only the necessary attestation packages that contain unverified authentication information. The tracking service identifies which keys in the chain have already been authenticated and excludes their attestation packages from transmission, sending only the minimal required subset to maintain authentication completeness.
Solution Approach 2:
The tracking service performs preliminary identification of which attestation packages are necessary for verification. By pre-processing the chain and determining authentication status of each key, the system prepares an optimized subset of attestation packages for transmission, reducing data volume while ensuring completeness.
3Measurement precision
If the tracking service verifies the entire chain of keys, then the authentication accuracy is ensured, but the processing time increases as the chain length increases
Solution Approach 1:
The tracking service performs preliminary verification of keys when they are first introduced into the chain and stores the verification results. When the vehicle requests authentication, the tracking service retrieves pre-verified information rather than re-verifying the entire chain, maintaining authentication accuracy while dramatically reducing verification time.
Solution Approach 2:
The verification process is segmented into two phases: initial comprehensive verification by the tracking service when keys are added to the chain, and subsequent lightweight verification by the vehicle using pre-processed information. This segmentation allows accurate verification without repeated full-chain processing.
Data Source
AI summary
A method for controlling access to a motor vehicle includes the steps of receiving a tracking request for a new digital key for a motor vehicle, wherein the new digital key is included in a chain of digital keys that have been created from one another, and wherein the tracking request includes a chain of attestation packages that are assigned to the digital keys in pairs; determining that a digital key to which one of the attestation packages of the chain is assigned has already been authenticated with respect to the motor vehicle; removing from the chain an attestation package that is assigned to a digital key that precedes the determined key in the chain; and providing a tracking response with at least one remaining attestation package.