Bluetooth Certificate Pairing for Secure Avionics Edge Nodes
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Solution Overview
Problem
There is a need for secure and reliable communication between aircraft avionics line replaceable units (LRUs) and handheld devices like iPads or iPhones for quick diagnostics and operations support, with existing Bluetooth pairing methods vulnerable to 'man-in-the-middle' attacks.
Innovation Solution
A method and system that utilize digital certificates and RSA encryption to establish encrypted connections between non-display devices and mobile devices, leveraging the Bluetooth wireless communications standard protocol, ensuring secure pairing and data transmission without modifying the underlying hardware or software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard Bluetooth pairing is used for communication between aircraft avionics and handheld devices, then ease of operation is improved, but security is worsened due to vulnerability to man-in-the-middle attacks
Solution Approach 1:
The system performs preliminary security actions by generating and exchanging digital certificates and RSA encryption keys before establishing the Bluetooth data connection. This preliminary cryptographic setup ensures that when pairing occurs, the security framework is already in place, preventing man-in-the-middle attacks while maintaining ease of operation.
Solution Approach 2:
The patent introduces digital certificates and encryption keys as intermediary elements between the avionics system and handheld device. These cryptographic intermediaries mediate the pairing process, verifying identities and establishing secure channels without requiring direct trust between the devices, thus resolving the security vulnerability.
2Reliability
If encrypted connections with digital certificates are implemented, then security is improved, but device complexity is worsened
Solution Approach 1:
The patent merges the security establishment process with the existing Bluetooth pairing workflow. By combining certificate exchange, key generation, and pairing confirmation into a unified process that leverages the GATT profile matching, the system improves security without proportionally increasing device complexity.
Solution Approach 2:
The system implements self-service mechanisms where the avionics edge node and handheld device automatically generate their own digital certificates and RSA key pairs. This self-provisioning of cryptographic credentials eliminates the need for external certificate authorities or manual key distribution, reducing operational complexity while maintaining high security.
Data Source
AI summary
Methods and systems have been developed for establishing a secured connection for data transmission. A first digital certificate is generated for a non-display device. This first digital certificate verifies the identity of the non-display device and enables encrypted connections. A second digital certificate is generated for a mobile device that uses a Bluetooth wireless communications standard protocol. The second digital certificate verifies the identity of the mobile device and enables encrypted connections. The mobile device then scans for a generic attribute (GATT) Bluetooth profile of the non-display device. Upon matching GATT properties, an encrypted connection that utilizes the Bluetooth protocol is initiated between the non-display mobile devices. An encrypted data channel is established between the non-display device and the mobile device upon successfully pairing the non-display device and the mobile device by exchanging the first digital certificate and the second digital certificate for authentication and exchanging RSA encryption keys.