Wireless Module Replacement via Encrypted Credential Storage
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Solution Overview
Problem
Replacing a wireless communications module in connected appliances is cumbersome, as it often requires a time-consuming cloud connection process and manual entry of network credentials, disrupting appliance functionality and losing historical operating data.
Innovation Solution
A method that detects the installation of a new wireless communications module, obtains and decrypts encrypted data containing network credentials, and establishes a connection with a remote server, seamlessly linking the new module with the appliance's historical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new Wi-Fi module is physically swapped to replace an old module, then the appliance can potentially restore network connectivity, but the connection process becomes time-consuming and requires manual intervention
Solution Approach 1:
The system performs preliminary actions by storing encrypted network credentials (SSID and password) in the appliance's memory before the Wi-Fi module is replaced. When a new module is installed, the system automatically retrieves and decrypts these pre-stored credentials, eliminating the need for manual re-entry of network information and enabling automatic reconnection to the remote server.
2Ease of manufacture
If a new Wi-Fi module with a different MAC ID is installed, then hardware replacement is achieved, but historical operating data becomes unlinked from the new module
Solution Approach 1:
The appliance's main control board acts as an intermediary by storing encrypted network credentials independently of the Wi-Fi module's MAC ID. When the new module is installed, the system uses this intermediary storage to provide the correct network credentials, ensuring that the appliance maintains its network identity and historical data linkage regardless of which specific Wi-Fi module is installed.
3Reliability
If manual entry of network credentials is required, then security control is maintained, but user operation complexity increases
Solution Approach 1:
The system implements self-service by automatically retrieving encrypted network credentials from its own memory storage and decrypting them using stored decryption keys. This self-service mechanism eliminates the need for user intervention in entering network credentials, while still maintaining security through the encryption/decryption process. The appliance serves itself by automatically restoring network connectivity without requiring manual input from the user.
Data Source
AI summary
A method for replacing an old wireless communications module of an appliance with a new wireless communications module includes detecting installation of the new wireless communications module in the appliance connected to a local network, obtaining encrypted data comprising a wireless network identifier and a wireless network password of the local network, decrypting the encrypted data to determine the wireless network identifier and the wireless network password, and establishing connection with a remote server through the local network using the wireless network identifier and the wireless network password.