V2X Security Data Distribution via Edge Channels for Low-Latency Reporting
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Solution Overview
Problem
Current methods for security certificate distribution, misbehavior report submission, and certificate revocation list distribution in V2X communication systems suffer from long latency, channel congestion, risk of denial of service, and bandwidth inefficiencies, which can compromise the reliability and safety of vehicular communication systems.
Innovation Solution
Implementing a mechanism where vehicles receive security certificates, misbehavior reports, and certificate revocation lists as a service through edge devices using control and service channels, reducing latency and congestion by announcing the availability of these data on a control channel and distributing them on a separate service channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If security certificates, misbehavior reports, and certificate revocation lists are distributed through traditional backend infrastructure, then system security is maintained, but latency increases and channel congestion occurs
Solution Approach 1:
The patent segments the distribution system by introducing edge devices that operate independently from the central backend. These edge devices cache and distribute security data locally, dividing the monolithic distribution architecture into distributed micro-regions that can operate autonomously, thereby reducing latency while maintaining security through localized verification capabilities
Solution Approach 2:
Edge devices serve as intermediaries between the backend infrastructure and vehicles. They receive security data from the backend and provide it to vehicles in real-time, acting as a buffer that reduces direct backend-vehicle communication overhead and enables faster local distribution without compromising the security chain
2Reliability
If all vehicles store all security certificates for hundreds of millions of participants, then certificate verification is complete, but device complexity and storage requirements increase
Solution Approach 1:
Vehicles store only the security certificates and data relevant to their local context and verification needs. Edge devices maintain localized copies of security data for their service regions, allowing vehicles to verify certificates without requiring complete global certificate sets, thus reducing storage complexity while maintaining verification reliability through localized sufficiency
Solution Approach 2:
The system transitions from a flat architecture where all vehicles must store all certificates to a hierarchical multi-dimensional structure. Security data is organized by geographic region and vehicle group, with edge devices managing local dimensions and vehicles accessing only their required subset, fundamentally changing the storage complexity from O(n) to O(1) per vehicle
3Reliability
If misbehavior reports are submitted to the backend through intermittent V2X connectivity, then centralized security management is maintained, but reporting latency increases and buffers overflow
Solution Approach 1:
Edge devices pre-cache security data and maintain local security management capabilities before connectivity issues arise. When vehicles need to report misbehavior or verify certificates, they can do so locally through the edge device without waiting for backend communication, performing security actions in advance and eliminating the need to buffer reports during connectivity gaps
Solution Approach 2:
The edge device provides self-service security management for its local vehicle population. It autonomously receives, caches, and distributes security data, and handles misbehavior reporting locally without requiring constant backend intervention. This self-sufficient operation eliminates buffering delays while maintaining centralized security policy through periodic backend synchronization
4Reliability
If certificate revocation lists are distributed to all vehicles, then misbehaved vehicles are evicted from the system, but bandwidth consumption and distribution overhead increase
Solution Approach 1:
Edge devices distribute localized certificate revocation lists relevant only to their service region and vehicle group. Vehicles receive CRLs from their local edge device rather than downloading complete global CRLs, reducing bandwidth consumption proportionally to the fraction of revoked certificates relevant to their locale while maintaining effective misbehavior detection for local threats
Solution Approach 2:
The certificate revocation list distribution is segmented into regional subsets managed by individual edge devices. Each edge device maintains and distributes its own CRL segment, allowing parallel distributed distribution that reduces total network bandwidth consumption from centralized broadcast to distributed multicast, while ensuring all vehicles receive the revocation information they need for their operational context
Data Source
AI summary
The present disclosure describe methods, apparatuses, storage media, and systems for a device disposed at an edge of a vehicular communication network or vehicles within a coverage area of the device. The device is to generate a list of vehicle security data to be distributed to vehicles currently within a coverage area of the device, based at least in part on a context related to the vehicles. The device is further to announce, on a control channel communicatively coupling the device and the vehicles, that the list of vehicle security data are available and a service channel to receive the list of vehicle security data. The list of vehicle security data are to be provided to the vehicles via the service channel. Other embodiments may be described and claimed.