Personal Health Device Wireless Pairing via Optical Key Transmission
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Solution Overview
Problem
Conventional communication methods between personal health devices (PHDs) and computing devices, such as Bluetooth, are insecure and prone to eavesdropping, as they often rely on radio frequency (RF) communication and require difficult key entry on devices with limited user interfaces, leading to potential mistakes and security breaches.
Innovation Solution
PHDs transmit a private key to computing devices via a first communication medium like light, sound, display, or barcode, which is then received and used for secure pairing over a second wireless communication medium like Bluetooth, Bluetooth Low Energy, or WiFi, enhancing security by changing the key after initial pairing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If private key is transmitted over RF in clear text for pairing, then pairing process is simplified, but security is compromised and eavesdropping becomes easy
Solution Approach 1:
The patent introduces an intermediary channel (optical communication via LED) to transfer the private key from the PHD to the computing device. This intermediary method avoids direct RF transmission of the key in clear text, thereby maintaining security while enabling automatic pairing. The LED emits light signals that encode the private key, which the computing device's camera captures and decodes.
Solution Approach 2:
The patent replaces the RF electromagnetic communication mechanism with an optical communication mechanism for key transmission. By using LED light emission and camera detection instead of RF waves, the system achieves secure key transfer without the security vulnerabilities inherent in RF clear text transmission.
2Reliability
If manual key entry is required on PHD with limited user interface, then pairing security can be maintained, but user operation becomes difficult and error-prone
Solution Approach 1:
The patent enables the PHD to automatically perform the key transmission function without requiring manual user input. The device self-generates and self-transmits the private key through LED optical signals, eliminating the need for users to manually type keys on the limited interface while maintaining security through the automated optical transmission process.
Solution Approach 2:
The private key is pre-configured in the PHD before the pairing process begins. The device is prepared in advance with the cryptographic key, and during pairing, it automatically transmits this pre-prepared key through optical communication, eliminating the need for real-time manual key entry during the pairing process.
3Ease of operation
If obvious private key numbers are used for easy entry, then ease of operation is improved, but security is significantly weakened
Solution Approach 1:
The patent uses optical communication as an intermediary channel that naturally prevents the use of obvious simple keys. The key is transmitted as encoded light signals rather than being manually entered, allowing the system to use strong cryptographic keys without requiring users to input them, thus maintaining both security and ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method securely pairs PHDs with computing devices, reducing the risk of eavesdropping and improving communication reliability by using multiple communication channels to transmit and receive the private key, making the connection more secure and user-friendly.
Implementation Method 1
In one embodiment, the first communication medium includes light and an LED of the PHD displays an optical signal corresponding to the private key
Implementation Method 2
The computing device obtains the private key when receiving the optical signal (e.g., via an optical sensor on the computing device, such as a camera or photodiode)
Data Source
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AI summary
Systems and methods for the wireless pairing of a personal health device (PHD) (105) (e.g., blood glucose monitor) with a computing device (110) (e.g., smartphone) are disclosed herein. In an embodiment, the PHD (105) communicates a private key to the computing device via a first communication medium (115) (e.g., light signal, audio signal, pattern). The PHD (105) receives from the computing device (110) via a second wireless communication medium (120) (e.g., Bluetooth® or WiFi) pairing information including the private key. The PHD (105) can then establish a secure communication channel with the computing device (110) by pairing the PHD (105) to the computing device (110).