Wi-Fi Direct Public Key Exchange via Intermediary Setting Device
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Solution Overview
Problem
Devices without the distinct function for obtaining public keys cannot perform Wi-Fi Direct communication, as they lack the necessary functionality to share communication parameters securely.
Innovation Solution
A communication method that allows devices without the QR code reading function to share communication parameters using public key encryption, where a setting device obtains public keys from other devices using QR codes or alternative methods like NFC, and then shares these parameters to establish Wi-Fi Direct connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If public key encryption is used to securely share communication parameters, then security is improved, but device complexity increases because devices need QR code reading functions
Solution Approach 1:
The patent introduces a setting device as an intermediary that performs public key encryption and QR code reading functions. This mediator handles the complex security operations, allowing ordinary communication devices to securely share parameters without needing built-in QR code reading capabilities, thus maintaining security while reducing device complexity requirements
Solution Approach 2:
The setting device serves multiple functions: it acts as a key management server, performs public key encryption, generates QR codes for key distribution, and facilitates Wi-Fi Direct connections. By consolidating these diverse functions into a single device, the system avoids requiring every communication device to have complex multi-functionality built-in
2Reliability
If QR code reading function is required for secure communication parameter sharing, then security is improved, but ease of operation deteriorates because devices without this function cannot communicate
Solution Approach 1:
The setting device acts as a mediator that performs QR code reading and public key extraction on behalf of communication devices. This eliminates the requirement for communication devices to have QR code reading functions, allowing any device to securely participate in Wi-Fi Direct communication through the intermediary's assistance
Solution Approach 2:
The setting device automatically performs public key extraction from QR codes, generates encrypted communication parameters, and distributes them to communication devices. This self-service automation eliminates manual configuration steps and makes the secure connection process easier to operate
Data Source
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AI summary
A communication device obtains identification information and a public key of a first other communication device by a particular obtaining method that does not use a wireless LAN and notifies the first other communication device of a role of the first other communication device in a communication based on Wi-Fi Direct. In addition, the communication device obtains identification information and a public key of a second other communication device by the particular obtaining method and notifies the second other communication device of a role of the second other communication device in the communication based on Wi-Fi Direct. One of the notified roles is a P2P Group Owner and the other one is a P2P Client, and the communication based on Wi-Fi Direct can be performed between the first other communication device and the second other communication device based on the notifications.