Bluetooth Node Pairing Using PSK for Secure Vehicle Connections
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Solution Overview
Problem
Bluetooth node pairing in vehicles is vulnerable to security threats due to low-security pairing modes used by NoInputNoOutput, DisplayOnly, and Display YesNo nodes, leading to untrusted connections that endanger user safety.
Innovation Solution
Implement a method for Bluetooth nodes to authenticate using pre-shared keys (PSKs) to verify the identity of nodes, especially for nodes without input/output capabilities, ensuring secure pairing by using predefined PSKs to prevent connections to untrusted devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If nodes without input/output capabilities use just work mode for pairing, then ease of operation is improved, but security deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring and storing unique identification information (such as device addresses or serial numbers) in both nodes before pairing occurs. During the pairing process, these pre-stored identification information are compared to verify node identity, enabling secure pairing without requiring real-time user input or display capabilities.
2Reliability
If PSK pairing capability is added to nodes without input/output capabilities, then connection security is improved, but device complexity increases
Solution Approach 1:
The patent extracts the essential security function from complex pairing mechanisms by using simple identification information comparison instead of full PSK authentication. The unique identification information (device address, serial number) is extracted from the node and compared during pairing, providing security without requiring complex key management or additional input/output capabilities.
Data Source
AI summary
In an example method, a second node receives a pairing request message from a first node, where the pairing request message includes information used to indicate whether the first node has a pre-shared key (PSK) pairing capability and an input/output capability. The second node sends a pairing response message to the first node in response to the pairing request message, wherein the pairing response message comprises information indicating whether the node pairing apparatus has a PSK capability and an input/output capability. The second node determines to preferentially using the PSK capability to authenticate the first node, in response to that the pairing request message indicates the first node has the PSK capability and the pairing response message indicates the node pairing apparatus has the PSK capability. The second node authenticates the first node based on a PSK.