Hardware Security Module Autonomous Self-Healing Control Unit
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Solution Overview
Problem
Control units in motor vehicles face security risks due to manipulation attempts, which existing technologies fail to address effectively, requiring secure environments for cryptographic keys and protection against unauthorized modifications, with current self-healing mechanisms relying on external triggers and not providing immediate, autonomous protection.
Innovation Solution
An electronic hardware security module (HSM) within the control unit detects manipulation and initiates automatic self-healing through reprogramming, using trusted software stored in its own flash memory or that of an unaffected unit or a trusted cloud, minimizing security risks and comfort losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external intervention is required for reprogramming after manipulation detection, then security can be maintained through centralized control, but response time increases and system availability decreases
Solution Approach 1:
The HSM performs self-diagnosis and automatically initiates reprogramming when manipulation is detected, without requiring external intervention. The control unit independently executes the healing process by reprogramming itself using stored backup software, enabling the system to heal itself and eliminating waiting time for external service intervention.
Solution Approach 2:
Backup software and reprogramming capabilities are pre-stored in the HSM's secure memory before any manipulation occurs. This preliminary preparation allows the system to immediately execute reprogramming upon detecting manipulation, significantly reducing response time compared to waiting for external intervention.
2Reliability
If manual reprogramming in customer service facility is performed, then proper security protocols can be followed, but system downtime and comfort losses increase
Solution Approach 1:
The control unit autonomously performs the reprogramming process that would otherwise require manual intervention at a customer service facility. The HSM detects manipulation, determines that reprogramming is needed, and triggers the self-reprogramming process, maintaining security protocols while eliminating system downtime associated with external service visits.
Solution Approach 2:
The HSM acts as an intermediary between the manipulated control unit and the reprogramming process. It securely manages the healing logic, coordinates the reprogramming execution, and ensures security protocols are maintained throughout the automated process, replacing the need for human intermediaries at service facilities.
3Reliability
If comprehensive manipulation detection and self-healing capabilities are implemented, then system security and autonomy improve, but device complexity increases
Solution Approach 1:
The HSM is designed to perform multiple functions within a single integrated module: secure key storage, manipulation detection, self-diagnosis, and automated reprogramming initiation. By consolidating these diverse security and diagnostic functions into one universal component, the system achieves comprehensive manipulation detection and self-healing without proportionally increasing overall device complexity.
Data Source
AI summary
A method for operating a control unit, such a control unit, and an electronic hardware security module are provided. A manipulation of a main computer unit is detected by the electronic hardware security module, and a check takes place whether reprogramming is possible.