Vehicle ECU Hardware Encryption for Secure On-the-Fly Data Access
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Solution Overview
Problem
Connected vehicles are vulnerable to malicious software attacks due to increased digital connectivity, which can lead to unintended vehicle behavior, component damage, and loss of features, compromising security and warranty.
Innovation Solution
A vehicle electronic control unit with a main processor and a security processor featuring programmable hardware for encryption, decryption, and authentication, along with reconfigurable IP cores for adaptive security measures, including side-channel attack countermeasures and firmware updates, to ensure secure data communication and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vehicles are connected to communication networks to enable digital connectivity, then communication capability and data exchange are improved, but vulnerability to malicious software attacks and security threats increases
Solution Approach 1:
The system separates security-critical operations from the main processor by implementing a dedicated security processor. This segmentation isolates authentication and encryption functions into a separate computational domain, preventing attackers from compromising the entire system through a single point of failure. The security processor operates independently to validate software updates and encrypt communications, maintaining security even when the main processor is vulnerable to attacks.
Solution Approach 2:
A security processor acts as an intermediary between the communication networks and the vehicle's control systems. This intermediary validates all incoming data and software updates before they reach the main processors, filtering out malicious content. The security processor mediates authentication requests and encryption operations, preventing direct access to vulnerable systems while enabling secure communication.
2Reliability
If a security processor with programmable hardware is implemented to provide robust security, then security strength and attack resistance are improved, but device complexity and processing overhead increase
Solution Approach 1:
The security processor is designed with reconfigurable hardware that can perform multiple security functions including authentication, encryption, decryption, and validation of software updates. This multi-functional design consolidates what could be separate security components into a single processor, reducing overall system complexity while maintaining comprehensive security coverage. The same hardware can be dynamically reconfigured to handle different security protocols and algorithms.
Solution Approach 2:
The security processor employs reconfigurable hardware that can dynamically adapt its processing capabilities based on the specific security requirements of each operation. This dynamic reconfiguration allows the processor to optimize its performance for different cryptographic algorithms and authentication protocols, providing strong security without requiring dedicated hardware for every possible function. The hardware can be reprogrammed to match the complexity level needed for each specific task.
3Adaptability or versatility
If reconfigurable IP cores are used to provide adaptive security measures, then adaptability to new threats and long-term security are improved, but manufacturing complexity and initial device cost increase
Solution Approach 1:
The IP cores are implemented with reconfigurable hardware that can be dynamically reprogrammed to address emerging security threats. This dynamic capability allows the system to adapt its security measures without requiring physical hardware changes or complete system redesign. The reconfigurable nature enables the same manufacturing process to produce devices that can evolve their security posture over time, reducing the need for multiple manufacturing variants.
Solution Approach 2:
The system incorporates reconfigurable IP cores that are pre-designed to handle a range of security functions, allowing for preliminary configuration during manufacturing while retaining the ability to be reprogrammed later. This approach enables standard manufacturing processes to produce devices with built-in adaptability, rather than requiring custom manufacturing for each security configuration. The preliminary setup provides baseline security while preserving future adaptability.
Data Source
AI summary
An electronic control unit (ECU) for vehicles is described, including memory to store encrypted data and unencrypted data; a main control unit operatively connected to memory to access unencrypted data; and a hardware encryption-decryption device operatively connected to memory to access encrypted/decrypted data for decryption using a hardware algorithm and for encryption using a hardware algorithm. Data in the memory is decrypted by the hardware encryption-decryption device using the hardware algorithm and stored in memory for use by the main control unit. Data in memory is encrypted by the hardware encryption-decryption device using the hardware algorithm for storage in memory. The main control unit and the hardware encryption-decryption device are separate integrate circuits on a same substrate or and are connected by a bus and can process data in parallel. An external bus can communicate encrypted information with the ECU to allow encrypt/decrypt at run time (on-the-fly) and wire-speed.