Regional Certificate Revocation List for Vehicular Network Nodes
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Solution Overview
Problem
In intelligent transportation systems, managing security certificates for vehicle network nodes is challenging due to the need for frequent updates and revocations, which can lead to network congestion and security vulnerabilities if not handled efficiently.
Innovation Solution
A method where a vehicle network node checks for revoked certificates within its communication range, generates a regional certificate revocation list, and updates it in real-time, reducing the need for individual nodes to download large global lists, thereby minimizing network congestion and ensuring immediate security updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a global certificate revocation list is downloaded by each vehicle network node, then security certificate revocation information can be obtained, but network congestion increases and communication efficiency decreases
Solution Approach 1:
The patent divides the global certificate revocation list into regional certificate revocation lists based on geographic regions. Each vehicle network node only downloads and maintains the revocation list for its current region, significantly reducing the data size each node must handle. When a vehicle moves to a different region, it receives the new regional revocation list from the road side unit in that region, ensuring security information is kept current without requiring download of the entire global list.
Solution Approach 2:
The patent implements local quality by providing certificate revocation information tailored to specific geographic regions. Each road side unit maintains and distributes a regional certificate revocation list that is relevant only to vehicles in its coverage area. This local approach ensures that each vehicle network node has access to the necessary security information for its current region without the overhead of maintaining global revocation lists, thereby improving communication efficiency while preserving security reliability.
2Reliability
If certificate revocation lists are updated frequently to maintain security, then security vulnerabilities are reduced, but network congestion and data transmission overhead increase
Solution Approach 1:
By segmenting the global revocation list into regional lists, the patent reduces the amount of data that needs to be transmitted and updated frequently. Each road side unit maintains a compact regional revocation list that can be quickly updated and distributed to vehicles in its coverage area, maintaining high security without the energy cost of transmitting large global lists across the entire network.
Solution Approach 2:
The road side units pre-generate and store regional certificate revocation lists for their respective regions. When a vehicle enters a region, the road side unit can immediately provide the appropriate revocation list without requiring the vehicle to download or process a large global list. This preliminary preparation of regional lists reduces real-time network energy consumption while ensuring security updates are promptly applied.
3Productivity
If a regional certificate revocation list is maintained instead of a global list, then network congestion is reduced and communication efficiency improves, but the complexity of managing multiple regional lists increases
Solution Approach 1:
The road side units autonomously generate, maintain, and distribute their own regional certificate revocation lists without requiring complex centralized coordination. Each road side unit independently manages its regional list, determining which certificates are revoked within its coverage area and distributing this information to vehicles locally. This self-service approach simplifies the overall system architecture compared to a centralized global list management system, as each component operates independently with well-defined local responsibilities.
4Reliability
If the certificate authority directly manages all certificate revocations, then centralized security control is maintained, but the system response time to security threats is delayed
Solution Approach 1:
The patent segments the centralized certificate authority into multiple distributed road side units, each responsible for a specific geographic region. When a certificate needs to be revoked, the road side unit detecting the revocation need can immediately generate and distribute the updated regional revocation list to vehicles in its coverage area, eliminating the delay associated with centralized processing and global distribution. This segmentation maintains security control while dramatically reducing the time required to propagate revocation information.
Solution Approach 2:
Road side units pre-generate regional certificate revocation lists and maintain them locally, so when a certificate revocation is needed, the updated information can be immediately distributed to vehicles in the region without waiting for centralized processing. This preliminary preparation of regional lists enables rapid response to security threats while maintaining the authority structure, as the road side units operate within their designated regional scopes.
Data Source
AI summary
A security certificate management method for a vehicular network node is applied in a vehicular network. A message is received. Whether a certificate in the message is revoked is determined. If the certificate in the message is revoked, a regional certificate revocation list (RCRL) is generated or updated based on the revoked certificate by the vehicular network node, and the RCRL is transmitted into a communication range of the vehicular network node.