Dynamic Certificate Revocation List Update Frequency
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Solution Overview
Problem
Current certificate management architectures fail to update certificate revocation lists frequently enough, leading to potential authentication of revoked certificates, which can cause chaotic traffic conditions, transaction fraud, and personal information leakage due to the inability to verify message legitimacy in real-time vehicular communications.
Innovation Solution
A method and system for a certificate authority to adjust the frequency of updating the certificate revocation list based on security levels from neighboring or central authorities, using a computing unit to detect revoked certificates and calculate an index value to determine the update frequency, ensuring timely updates during emergency or safety modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the certificate revocation list is updated frequently, then the security level is improved, but the bandwidth consumption and system overhead increase
Solution Approach 1:
The patent implements dynamic adjustment of certificate revocation list update frequency based on detected security threats. When revoked certificates are detected in the neighborhood, the update frequency automatically increases; when no threats are present, it decreases. This dynamic adaptation resolves the contradiction by making bandwidth consumption variable rather than fixed, intensifying updates only when security risks are detected.
Solution Approach 2:
The system changes the parameter of update frequency based on security conditions. By calculating an index value from security level information and adjusting the update frequency accordingly, the patent transforms the static update mechanism into a conditional one, achieving high security when needed while conserving bandwidth during normal operations.
2Loss of energy
If the certificate revocation list is updated infrequently, then the bandwidth consumption is reduced, but the security level deteriorates due to potential authentication of revoked certificates
Solution Approach 1:
The patent implements a feedback mechanism where certificate authorities monitor for revoked certificates in their neighborhoods and use this information to adjust update frequencies. This feedback loop ensures that when security threats are detected (revoked certificates in use), the system responds by increasing update frequency, thereby maintaining authentication reliability while avoiding unnecessary updates during secure periods.
Solution Approach 2:
The system performs preliminary detection of revoked certificates and adjusts update frequency proactively before security incidents occur. By monitoring security conditions and pre-adjusting the update frequency based on detected threats, the system prevents authentication of revoked certificates while minimizing unnecessary bandwidth consumption.
3Device complexity
If the update frequency is fixed, then the system complexity is reduced, but the adaptability to different security conditions deteriorates
Solution Approach 1:
The patent transforms the static fixed update frequency mechanism into a dynamic adaptive one. By introducing security level monitoring and index value calculation, the system automatically adjusts update frequencies based on actual security conditions, achieving high adaptability while adding only moderate complexity through standardized algorithms for security assessment and frequency adjustment.
Data Source
AI summary
A method for adjusting the frequency of updating certificate revocation list is provided. The method is used in a certificate authority. The method includes: receiving a first information indicating security levels from neighbor certificate authorities in a neighborhood or a central certificate authority; detecting whether the certificate authority has received a signal indicating that a user is using a revoked certificate and generating a second information of a security level; calculating an index value or a set of index values by the first information indicating the security levels of neighborhoods and the second information indicating its own security level; and adjusting the update frequency of updating the certificate revocation list according to the calculated index values or the set of index values.