Peephole Authentication Device with Mobile Terminal
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Solution Overview
Problem
Existing authentication devices for verifying visitors at home or office are complex, costly, difficult to install, and require replacement of existing doors, with high maintenance needs and poor reliability.
Innovation Solution
A simplified authentication system comprising a mobile terminal with a rechargeable battery and recognition apparatus, connected via USB connectors to a fixed terminal housed in a peephole, using cryptographic authentication signals and a central server for secure verification without the need for extensive power or cable connections, allowing easy integration with existing doors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed terminal with complex identification system (videocamera, database, screen) is installed at the front door, then authentication reliability is improved, but device complexity and installation cost increase
Solution Approach 1:
The authentication system is divided into three independent components: a mobile terminal carried by the visitor, a fixed terminal at the door, and a central server. This segmentation allows each component to have simplified functionality while maintaining overall system reliability through their coordinated interaction.
Solution Approach 2:
The mobile terminal acts as an intermediary between the visitor and the fixed terminal. It carries authentication data and communicates with both the fixed terminal and central server, enabling reliable authentication without requiring the fixed terminal to contain complex databases or processing systems.
2Reliability
If a fixed terminal with battery and electric cable connections is installed, then authentication functionality is improved, but ease of installation and adaptability to existing doors deteriorate
Solution Approach 1:
The mobile terminal serves multiple functions: it stores authentication data, communicates with the fixed terminal, and interfaces with the central server. This multi-functionality eliminates the need for the fixed terminal to have complex power and data storage systems, making it easier to install in existing doors.
Solution Approach 2:
The battery and complex power management system are extracted from the fixed terminal and placed in the mobile terminal. This extraction simplifies the fixed terminal to a basic communication and verification device that can be easily installed in existing door structures without extensive electrical infrastructure.
3Reliability
If cryptographic authentication signals are used between terminals, then security is improved, but device complexity increases
Solution Approach 1:
The central server generates cryptographic authentication signals that are copied to the mobile terminal. This copying approach allows the complex cryptographic operations to be performed once by the server, rather than requiring each terminal to have full cryptographic capabilities, thus maintaining security while reducing device complexity.
Data Source
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Figure 2
AI summary
It is provided an authentication device (1) of a subject making a house call comprising a fixed terminal (20) adapted to be fastened in the vicinity of an entrance (10) of the house; a mobile terminal (30) including identification data of the coming subject and adapted to be carried by the coming subject in the vicinity of the entrance (10); the fixed terminal (20) being adapted to be brought into connection with the mobile terminal (30), so as to receive the activation energy from the mobile terminal (30) and therefore identify it.