Unicast Activation Code Delivery for V2X Privacy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The large-scale deployment of V2X technologies faces challenges in ensuring the security and privacy of vehicle communications, particularly in managing Certificate Revocation Lists (CRLs) that grow exponentially due to the need for frequent updates and the potential compromise of user privacy.
Innovation Solution
The implementation of a unicast mode for distributing Activation Codes for Pseudonym Certificates (uACPC) using edge computing, which leverages privacy-preserving methods to extend the distribution of activation codes directly to vehicles upon request, reducing the need for caching and ensuring timely and secure delivery of CRLs while maintaining user privacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent updates of Certificate Revocation Lists (CRLs) are implemented to ensure security, then security is improved, but CRL size grows exponentially and user privacy is compromised
Solution Approach 1:
The patent extracts the activation code from the certificate itself, separating the revocation mechanism into two independent components: the certificate (which remains valid) and the activation code (which is revoked). This allows CRLs to contain only activation codes rather than entire certificates, dramatically reducing CRL size while maintaining security through the ability to revoke access by withholding activation codes.
Solution Approach 2:
The patent applies different quality characteristics to different parts of the certificate system: certificates are made long-lived and stable, while activation codes are made short-lived and frequently updated. This local differentiation allows the system to maintain security through frequent activation code rotation without requiring frequent updates of the entire CRL structure.
2Reliability
If CRLs are frequently updated to maintain security, then security is improved, but user privacy is compromised due to tracking
Solution Approach 1:
By extracting the activation code as a separate revocable element, the system can revoke user access without updating CRLs frequently. The activation code serves as a disposable credential that can be invalidated by simply not providing it during the activation period, eliminating the need for continuous CRL updates that would expose user movement patterns.
Solution Approach 2:
The patent employs activation codes as disposable, short-lived objects that are valid only for a specific activation period. Once expired or revoked, they are discarded without needing to be tracked in a CRL. This disposable nature allows frequent credential rotation without creating a persistent tracking record, thereby preserving user privacy while maintaining security.
3Productivity
If activation codes are distributed via broadcast mode, then distribution efficiency is improved, but privacy is compromised due to caching requirements
Solution Approach 1:
The patent extracts the activation code delivery from the broadcast mechanism, using unicast delivery instead. This separation allows the system to maintain the efficiency of pre-distributing certificates via broadcast while delivering activation codes individually through secure unicast channels, eliminating the need for caching and associated privacy risks.
Solution Approach 2:
The patent introduces a unicast delivery mechanism as an intermediary between the certificate authority and the user for activation code distribution. This intermediary channel provides secure, direct delivery without requiring the user to cache broadcast information, combining the efficiency of pre-distribution with the privacy protection of targeted delivery.
4Loss of information
If unicast mode is used for distributing activation codes, then privacy is improved by eliminating caching, but distribution complexity increases
Solution Approach 1:
The patent applies preliminary action by distributing certificates via broadcast in advance, so that when activation codes are delivered through unicast channels, the receiving devices already have the certificates cached and ready. This preliminary distribution reduces the complexity of unicast delivery, as devices only need to receive and activate the code rather than store and manage entire certificate bundles.
Data Source
AI summary
In a vehicle-to-everything (V2X) technology environment, systems and methods are provided for extending the distribution of activation codes (ACs) in an Activation Codes for Pseudonym Certificates (ACPC) system, in a privacy-preserving manner, to a unicast mode of communication. In this unicast ACPC (uACPC), in some embodiments, the ACs are distributed by the back-end system via a unicast channel upon the receipt of the vehicle's direct request for its respective ACs. In some embodiments, uACPC can leverage edge computing architecture for low latency delivery of certificate revocation lists (CRLs) and higher availability for the distribution of ACs.