Intraoral Scanner Pairing Protocol for Low-Power Secure Communication
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Solution Overview
Problem
Intraoral scanning devices face security challenges due to their limited computational power and memory, making them vulnerable to unauthorized access, data theft, and attacks like battery exhaustion, replay, and man-in-the-middle attacks, which compromise the integrity of sensitive patient data.
Innovation Solution
Implementing a secure configuration and update mechanism for intraoral scanning devices using cryptographic keys, certificates, and authentication protocols to verify client devices, ensuring only authorized parties can access and modify the device, thereby protecting against unauthorized modifications and attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard security algorithms and protocols are applied to the intraoral scanning device, then communication security is improved, but computational power requirements increase causing battery exhaustion and functional degradation
Solution Approach 1:
The security protocol is segmented into multiple phases: a pairing phase where cryptographic keys are established between the scanning device and external device, and a data transmission phase where pre-shared keys are used. This segmentation allows lightweight security measures to be applied without requiring continuous heavy computational operations, thus reducing battery consumption while maintaining security.
Solution Approach 2:
Cryptographic keys and security parameters are established in advance during the pairing phase before actual data transmission occurs. The external device stores these pre-shared keys, allowing the intraoral scanning device to use them for subsequent authentication and data encryption without repeatedly performing computationally intensive key exchange operations, thereby reducing ongoing power requirements.
2Reliability
If comprehensive security measures are implemented to protect against various attacks, then device robustness is improved, but device complexity increases
Solution Approach 1:
The security architecture is segmented into distinct functional components: a pairing mechanism for initial key establishment, an authentication mechanism using pre-shared keys for verifying device identity, and a data protection mechanism for securing transmissions. This modular segmentation allows each component to be implemented simply without requiring the entire system to be overly complex.
Solution Approach 2:
The intraoral scanning device automatically performs authentication and key selection based on identifiers received during communication, without requiring manual intervention or complex configuration. The device self-manages the security protocol by automatically verifying credentials and establishing secure connections, reducing the complexity burden on the user while maintaining robust security.
3Reliability
If authentication protocols are implemented to verify client devices, then unauthorized access is prevented, but communication overhead increases
Solution Approach 1:
Authentication credentials and cryptographic keys are exchanged and stored in advance during the pairing phase. Once paired, the intraoral scanning device can quickly authenticate with the external device using these pre-shared keys without repeating lengthy authentication sequences, thus reducing communication time while maintaining strong access control.
Solution Approach 2:
The authentication protocol uses partial verification by checking identifiers and selecting appropriate keys from pre-established sets rather than performing complete cryptographic verification every time. This partial action approach maintains sufficient security for access control while significantly reducing the time required for each authentication cycle.
Data Source
AI summary
Embodiments relate to an intraoral scanning device that may include a processing unit configured to process intraoral scan data and provide 2D image data and/or 3D image data, a wireless interface configured for transmitting the 2D image data and/or the 3D image data, and a memory. The processing unit may be configured to receive a linking request for a session via the wireless interface, obtain a session identifier, transmit, via the wireless interface, a linking response. Furthermore, the processing unit may be configured to receive, via the wireless interface, an authentication message, select an intraoral scanning device key from a plurality of intraoral scanning device keys in the memory unit based on an authentication key identifier, verify client device data based on the selected intraoral scanning device key, and terminate the session if the verification fails.