Communication Device Wireless Authentication Key Management
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Solution Overview
Problem
Existing communication devices require users to wait for information creation during the communication parameter setting process, compromising user convenience.
Innovation Solution
A communication device equipped with a processor, memory, and a wireless interface that outputs information using a public key, receives authentication requests, and establishes wireless connections by creating and storing new public keys, allowing for immediate information output and connection establishment upon user instruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication device creates information for authentication after receiving user instruction, then the authentication process can be executed, but the user has to wait for the information to be created which compromises user convenience
Solution Approach 1:
The communication device stores the first public key in advance in the memory before the user inputs the predetermined instruction. When the instruction is received, the device can immediately output the first information using the pre-stored public key without waiting for key generation, thus eliminating the waiting time while ensuring authentication reliability.
2Device complexity
If the communication device uses the same public key for multiple authentication processes, then the device complexity is reduced, but the security against unauthorized use is compromised
Solution Approach 1:
After the authentication process using the first public key is completed, the communication device deletes the first public key from the memory and creates a second public key for subsequent authentication processes. This ensures that each authentication uses a unique key, preventing unauthorized use while maintaining simple key management through systematic replacement.
Solution Approach 2:
The communication device creates and stores a second public key in advance before the next authentication process. When the user inputs the predetermined instruction again, the device can immediately output the second information using the pre-stored second public key, ensuring security without waiting for key generation.
3Reliability
If the communication device deletes the first public key after authentication, then unauthorized use is prevented, but the device must create and store new public keys which increases processing time
Solution Approach 1:
The communication device creates and stores the second public key in advance before the next authentication process is needed. When the user inputs the predetermined instruction again, the device can immediately output the second information using the pre-stored second public key without waiting for key generation, thus preventing unauthorized use while minimizing processing time.
Data Source
AI summary
A communication device may: comprise an output unit configured to output first information obtained by using a first public key in a memory in a case where a predetermined instruction is inputted to the communication device; after the first information has been outputted, receive an authentication request in which the first public key is used from a terminal device; send an authentication response to the terminal device; establish a wireless connection between the communication device and an external device; and in a case where a predetermined condition is satisfied after the first information has been outputted, create a second public key different from the first public key and store the second public key in the memory. In a case where the predetermined instruction is inputted to the communication device again, the output unit may be configured to output second information obtained by using the second public key in the memory.