Electric control unit and method of appling a distributed consensus protocol of distributed network system

Blockchain-based security system for vehicle hacking defense

This technology is about a distributed consensus protocol in a distributed network. It is about a distributed consensus protocol method that allows participants in the system to maintain the same authentication key in an environment where encryption authentication keys are dynamically generated based on blockchain in a bus-type distributed network, such as an in-vehicle network. It wasn't enough.

To solve these problems, this technology proposes an efficient distributed consensus protocol that allows all ECUs to maintain the same key even when message reception fails in a blockchain-based dynamic key generation environment. This protocol satisfies CAN communication characteristics and real-time, and ensures encryption key matching between ECUs, strengthening the reliability and security of the vehicle's internal network, presenting an essential solution to vehicle hacking defense.

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Key Features:

• Minimizes unnecessary network load by not intervening in normal times and operating only when a failure such as message omission occurs
• Defines the state of the ECU as 'normal state', 'error state', and 'consensus state', and solves the key mismatch problem by operating the protocol according to each state and transition condition
• Efficiently utilizes three new message types such as error flag, consensus request, and consensus message, and EEPROM data saved from previous driving Perform consensus
• Minimize network overhead by reducing unnecessary communication with the 'Lazy' method that operates only when a message is missed, and adopt a regression method that is efficient in terms of time and memory compared to existing methods (rollback, replication)

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This technology was developed through the Information and Communication Technology Promotion Center's research project on developing adaptive blockchain platform technology and training professional personnel.

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