Communication Device Public Key Transmission Control
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Solution Overview
Problem
The existing Device Provisioning Protocol (DPP) scheme does not restrict the sending of public keys, leading to unintended Wi-Fi connections between devices when a user intends to connect with a different device.
Innovation Solution
A communication device is equipped with a display unit, multiple wireless interfaces, a processor, and memory, which executes instructions to receive a specific signal, display an instruction screen, and only send a public key to the intended device upon user instruction, thereby controlling the establishment of wireless connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the Responder sends the public key using Bluetooth communication without restriction, then the public key transmission is simple and fast, but unintended devices may receive the public key and establish unauthorized Wi-Fi connections
Solution Approach 1:
The patent introduces an intermediary instruction screen displayed on the Responder device that mediates between the public key transmission and the authentication process. This instruction screen requires user confirmation before the public key is sent, acting as a mediator that prevents unauthorized transmissions while maintaining the Bluetooth communication channel for actual data transfer.
Solution Approach 2:
The patent implements a preliminary action by displaying an instruction screen and requiring user confirmation before the public key is transmitted. This preliminary step ensures that only intended recipients can receive the public key, preventing unauthorized devices from establishing connections while maintaining the efficiency of the subsequent authentication process.
2Reliability
If the system requires user confirmation before sending the public key, then unauthorized connections are prevented, but the connection establishment process becomes more complex and time-consuming
Solution Approach 1:
The patent applies self-service by having the Responder device automatically display the instruction screen and handle the confirmation process without requiring external intervention. The device serves itself by managing the authorization workflow internally, reducing the complexity burden on the user while maintaining high authorization accuracy.
Solution Approach 2:
The instruction screen serves multiple functions: it displays device identification information, requests user confirmation, and controls the public key transmission. This multi-functional component reduces overall system complexity by consolidating several operations into a single universal interface.
3Ease of operation
If the public key is sent without displaying an instruction screen, then the connection process is faster and simpler, but users lose control over which devices can connect
Solution Approach 1:
The patent introduces dynamics by making the public key transmission conditional rather than static. The instruction screen dynamically adapts to user input, allowing the process to proceed only when the user confirms the intended recipient. This dynamic approach maintains simplicity for authorized connections while providing control flexibility when needed.
Data Source
AI summary
A communication device may receive a specific signal from a first external device; display a first instruction screen; in a case where it is instructed that the target process is to be executed in a situation where the first instruction screen is displayed, send a public key to the first external device, wherein in a case where it is not instructed that the target process is to be executed in the situation where the first instruction screen is displayed, the public key is not sent; after the public key has been sent to the first external device, receive an authentication request from the first external device; send an authentication response to the first external device; receive connection information from the first external device; and establish, by using the connection information, a wireless connection between the communication device and a second external device.