V2X L2 ID Verification for Privacy Protection

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Solution Overview

Problem

Existing communication systems face security risks in V2X communication, particularly in LTE and 5G networks, where vehicles can be tracked using Layer 2 Identifiers (L2 IDs), compromising privacy.

Innovation Solution

A communication system and method that involves sending a message with L2 ID and verification information from one User Equipment (UE) to another, allowing the receiving UE to determine whether to accept the new L2 ID, thereby enhancing security and privacy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If L2 ID is used for vehicle communication in V2X, then communication efficiency is improved, but privacy is compromised due to tracking risk

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidprivacy risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The L2 ID is made dynamic by introducing periodic updates and verification mechanisms. The receiving UE determines whether to accept the L2 ID based on verification information, allowing the system to adapt between maintaining communication efficiency and protecting privacy through controlled ID changes.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A feedback mechanism is implemented where the receiving UE evaluates verification information and provides acceptance decisions. This feedback loop enables the system to dynamically adjust L2 ID usage based on security requirements while maintaining communication efficiency when verification succeeds.

Inventive Principle:

Principle #23Feedback

2Object-affected harmful factors

If L2 ID update mechanism is implemented, then privacy is improved by preventing tracking, but device complexity increases

Engineering Contradiction:

Improvetracking preventionVSAvoidverification mechanism complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Verification information acts as an intermediary element that enables privacy protection without requiring complex direct authentication between UEs. The verification information mediates the L2 ID update process, simplifying the overall mechanism while achieving tracking prevention.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The verification information is designed as a temporary, single-use element that validates L2 ID updates without requiring long-term storage or complex management. This disposable verification approach reduces device complexity compared to persistent authentication mechanisms.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If verification information is added to messages, then security is improved by enabling L2 ID acceptance determination, but message size increases

Engineering Contradiction:

Improvesecurity reliabilityVSAvoidmessage data volume

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The verification information is extracted as a separate, minimal element from the main communication message. This extraction allows security verification to be performed with minimal additional data overhead, maintaining message efficiency while improving security reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12342247B2Method and device for reducing security risk in communication

Publication Date: 2025.06.24 NEC CORP

AI summary

A communication system, a UE (User Equipment), a communication method and a computer readable medium may be provided. The communication system (100) includes: a first UE (User Equipment) (110) including a first controller and a first transceiver, wherein the first controller is configured to control the transceiver to send a message including L2 ID (Layer 2 Identity) and verification information; and a second UE (120) including a second controller and a second transceiver, wherein the second controller is configured: to control the transceiver to receive the message from the first UE (110); and to determine whether to accept the L2 ID or not using the verification information.