Medical Device Pairing via Time-Referenced Hash Keys
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Solution Overview
Problem
Current medical apparatus remote control pairing methods are cumbersome and vulnerable to unintended operation due to the use of preset device addresses, which can be manipulated, compromising safety.
Innovation Solution
A pairing procedure using a unique identifier from the remote control device and time-referenced information from the medical apparatus to generate and store hash keys, ensuring a secure and distinctive connection by matching these keys for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a preset device address is used for pairing, then the pairing process is simplified, but the system becomes vulnerable to manipulation and unintended operation
Solution Approach 1:
The system performs preliminary actions by generating hash keys before the actual pairing operation. The medical apparatus generates a hash key based on its device address and a random number, and the remote control device generates a hash key based on the received device address and its own random number. These pre-generated hash keys are then used to verify the pairing relationship, preventing manipulation while maintaining simplicity.
Solution Approach 2:
The patent introduces hash keys as an intermediary element between the device address and the pairing confirmation. Instead of directly using the preset device address for pairing verification, the system uses hash keys derived from the device address and random numbers. This intermediary layer prevents direct manipulation of the device address while maintaining the simplicity of the pairing process.
2Reliability
If buttons are pressed on both devices to confirm pairing, then the connection security is enhanced, but the pairing procedure becomes elaborate and time consuming
Solution Approach 1:
The system implements self-service by automatically generating and verifying hash keys without requiring manual button pressing on both devices. The medical apparatus sends its device address and random number to the remote control device, and both devices automatically generate hash keys based on this information. The pairing is confirmed when the hash keys match, eliminating the need for elaborate manual confirmation steps.
Solution Approach 2:
The patent replaces the mechanical action of pressing buttons with an automated electronic verification process. Instead of requiring physical button presses on both devices to confirm pairing, the system uses electronic transmission of device addresses and random numbers, followed by automated hash key generation and verification. This substitution eliminates manual intervention while maintaining security.
3Adaptability or versatility
If a remote control device can operate multiple medical apparatuses, then the adaptability is improved, but the risk of unintended operation increases
Solution Approach 1:
The system applies local quality by creating a unique pairing relationship between each remote control device and medical apparatus through individual hash key generation. Each medical apparatus has its own device address and random number, resulting in a unique hash key that is specific to that particular pairing. This ensures that a remote control device paired with one medical apparatus cannot operate another medical apparatus, preventing unintended operation while maintaining adaptability.
Solution Approach 2:
The patent uses parameter changes by incorporating random numbers into the hash key generation process. The random number parameter ensures that even if two medical apparatuses have the same device address, their hash keys will be different. This dynamic parameter change prevents a single remote control device from operating multiple medical apparatuses, as each pairing requires a unique hash key match.
Data Source
AI summary
In a system, a medical apparatus and a remote control device perform a pairing procedure, in which the remote control device sends an identifier of the remote control device, the medical apparatus sends a time-referenced information, the remote control device receives the time-referenced information and generates a first hash key based on the identifier and the time-referenced information, and the medical apparatus receives the identifier and generates a second hash key based on the identifier and the time-referenced information. The second hash key corresponds to the first hash key, wherein, when the pairing has been successfully completed, the remote control device sends an instruction controlling the medical apparatus based on the first hash key, and the medical apparatus accepts the instruction if the first hash key corresponds to the second hash key.