Digital Key Sharing System Anomaly Detection via Spatial-Temporal Analysis
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Solution Overview
Problem
Digital key sharing systems in the automotive sector face security threats due to compromised smart devices, which can lead to unauthorized access and forged key requests, making it difficult to distinguish between valid and invalid access attempts.
Innovation Solution
A digital key sharing system that includes an electronic circuit and a server computer to analyze key sharing requests, generate features based on physical distances and arrival times, and detect anomalies, sending alerts and suspend notifications to prevent misbehavior and Sybil attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital key sharing is enabled among multiple smart devices, then key sharing functionality and user convenience are improved, but security vulnerability increases due to compromised devices being able to generate forged key requests
Solution Approach 1:
The system performs preliminary analysis of key request patterns by generating features from spatial and temporal data before authentication decisions are made. This proactive approach establishes a baseline of normal behavior and enables early detection of compromised devices before they can cause significant security breaches.
Solution Approach 2:
The system continuously monitors key sharing requests and provides feedback through anomaly detection. By analyzing patterns in real-time and comparing them against established baselines, the system can identify deviations that indicate compromised devices and respond by suspending access for suspicious devices while maintaining access for legitimate users.
2Adaptability or versatility
If multiple key sharing requests are processed, then key sharing capability is improved, but difficulty in detecting and measuring suspicious behavior increases due to the volume and complexity of requests
Solution Approach 1:
The system transforms raw key request data into meaningful features by extracting spatial parameters (distances between devices) and temporal parameters (arrival times of requests). This parameter transformation converts complex, high-volume request data into a manageable feature space that can be effectively analyzed for anomalies using clustering algorithms.
Solution Approach 2:
The system adds dimensional context to key requests by incorporating spatial dimensions (physical distances) and temporal dimensions (arrival times) to the analysis. This multi-dimensional approach enables the detection of patterns that would be invisible in single-dimensional analysis, such as coordinated attacks from multiple devices that maintain specific spatial-temporal relationships.
3Reliability
If anomaly detection and monitoring are implemented, then security detection capability is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The system segments the security monitoring task into distinct functional components: feature generation from raw requests, clustering analysis of spatial-temporal patterns, anomaly detection through validation decisions, and response execution. This segmentation allows each component to be optimized independently and simplifies the overall system architecture by breaking down complex security monitoring into manageable modules.
Data Source
AI summary
A digital key sharing system includes an electronic circuit and a first server computer. The electronic circuit is configured to store a plurality of digital keys, receive a plurality of key sharing requests, and generate a plurality of features in response to the plurality of key sharing requests. The first server computer is in wireless communication with the electronic circuit and is configured to generate an alert signal in response to finding one or more anomalies in the plurality of features to initiate a notification to a primary user device associated with the electronic circuit, and send a suspend notification signal to the electronic circuit in response to the finding of the one or more anomalies in the plurality of features. The electronic circuit is further configured to suspend use of the plurality of digital keys in response to reception of the suspend notification signal.