Hardware Security Module for Vehicle-to-X Message Authentication
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Solution Overview
Problem
Current vehicle-to-X communication systems face challenges in ensuring efficient data security against unauthorized access and counterfeiting, particularly due to the transient nature of vehicle environments which complicates encryption and authentication processes.
Innovation Solution
A method and system that utilize a processor and a separate, EAL4+ certified hardware security module, coupled via a shared secret, to encrypt and authenticate vehicle-to-X messages, with the hardware security module being designed as a separate integrated circuit to prevent misuse, and incorporating a TRNG for key generation and secure boot processes to enhance data protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption and authentication are performed using a processor in vehicle-to-X communication, then data security is improved, but computing load and processing time increase
Solution Approach 1:
The system separates encryption and authentication functions from the main processor and implements them in a dedicated hardware security module. This segmentation allows the processor to focus on other tasks while the HSM handles security operations, reducing computing load and processing time while maintaining data security.
Solution Approach 2:
A hardware security module acts as an intermediary between the processor and the cryptographic operations. The HSM contains dedicated security processors that perform encryption and authentication, mediating between the main system and security requirements, thereby reducing the burden on the main processor.
2Reliability
If a separate hardware security module is used for encryption and authentication, then data security is improved, but device complexity increases
Solution Approach 1:
The hardware security module combines multiple security functions (encryption, authentication, key management) into a single integrated unit. This merging reduces overall system complexity by consolidating security operations rather than requiring separate implementations for each function.
Solution Approach 2:
The hardware security module is designed to be self-contained with built-in security processors and key storage. It autonomously performs security operations without requiring complex external control logic, simplifying the overall system architecture while enhancing security.
Data Source
Figure 1
AI summary
The invention relates to a system for improving the data security during a communication process, comprising at least one processor (4) and a hardware security module (3). The communication data is authenticated prior to a transmission process, and the authenticity of the communication data is checked upon being received. The authentication is carried out by means of the processor (4), and the authentication check is carried out by means of the hardware security module (3), wherein the communication data is car-to-X messages. The processor (4) and the hardware security module (3) are linked via a common secret element such that at least the hardware security module (3) cannot be coupled to another processor.