Intercom Master Device Authentication for Secure Remote Unlocking
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Solution Overview
Problem
Existing intercom systems lack sufficient security measures, particularly when unlocking doors from communication terminals over public networks, as they can be compromised by unauthorized access or imitation of genuine terminal information, leading to potential illegal unlocking of entrance doors.
Innovation Solution
An intercom system that includes an electronic lock, an entrance slave device, and an intercom master device, where the unlocking operation from a wireless terminal is approved only if configured as such in the terminal information table, preventing unauthorized unlocking by verifying the terminal's authentication and limiting operations based on predefined approval settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unlocking operations are allowed from wireless terminals over public networks, then convenience and remote access capability are improved, but security vulnerability increases due to potential unauthorized access or terminal information imitation
Solution Approach 1:
The system performs preliminary authentication of the wireless terminal before allowing unlocking operations. The intercom master device verifies terminal information and authentication credentials in advance, maintaining a list of authorized terminals. This preliminary verification prevents unauthorized access while allowing convenient remote unlocking for authenticated users.
Solution Approach 2:
The intercom master device acts as an intermediary between the wireless terminal and the electronic lock. It receives unlocking requests from terminals, verifies their authenticity against stored authentication data, and only relays approved requests to the lock. This intermediary role filters out malicious requests while permitting legitimate remote operations.
2Reliability
If authentication verification is implemented for wireless terminals, then security is improved, but system complexity increases due to additional verification mechanisms
Solution Approach 1:
The system stores copies of authorized terminal information and authentication credentials in the intercom master device. Instead of complex real-time verification protocols, it compares incoming terminal data against pre-stored authentication copies. This simplifies the verification process while maintaining security through data matching.
3Reliability
If terminal information verification is performed, then unauthorized unlocking is prevented, but processing time increases due to additional verification steps
Solution Approach 1:
Terminal authentication data is verified in advance and authorized terminals are pre-approved for unlocking operations. When an unlocking request arrives from a pre-authenticated terminal, the system can quickly verify against stored approval data without performing complex real-time analysis, reducing processing time while maintaining security.
Data Source
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AI summary
In an intercom system, when it is detected that a person has come to an entrance door, an entrance slave device transmits a visiting notification to an intercom master device. When receiving the visiting notification, the intercom master device transmits a terminal-destined visiting notification to a wireless terminal. When receiving the terminal-destined visiting notification, the wireless terminal outputs information indicating that a person has come to the entrance door, and when an unlocking instruction operation is performed in the wireless terminal, transmits a terminal's unlocking instruction to the intercom master device. An operation of configuring whether or not to approve an operation of unlocking an electronic lock of an entrance door, which is performed by the wireless terminal, is performed on the intercom master device, and when receiving the terminal's unlocking instruction, the intercom master device unlocks the electronic lock under the condition that approval of the unlocking operation is configured.