Imaging Device Interface Physical Isolation via Changeover Switch
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Solution Overview
Problem
Shared imaging devices, such as printers, pose security risks due to data communication between multiple computers connected via USB, especially when different networks are involved, leading to potential data theft and network vulnerabilities.
Innovation Solution
An imaging device with an integrated changeover switch unit and monitoring system that physically isolates or connects interfaces with the interface control unit, using a switch trigger unit and monitoring unit to manage communication states and prevent unauthorized data transfer, ensuring only one interface is active at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple USB interfaces are provided for simultaneous connection to multiple computers, then the imaging device's versatility and productivity are improved, but the security risk of data leakage and network vulnerability increases
Solution Approach 1:
The patent divides the USB interface connections into separate physical pathways using changeover switches. Each USB interface can be independently controlled to connect to either the imaging control unit or be isolated, creating segmented communication paths that prevent unauthorized data transfer while maintaining legitimate imaging functionality.
Solution Approach 2:
The changeover switch unit acts as an intermediary between the USB interfaces and the imaging control unit. It mediates the data transmission by selectively connecting or disconnecting interfaces based on authentication results, thereby controlling the flow of information and preventing direct access between different computer networks.
2Object-affected harmful factors
If a changeover switch unit is introduced to physically isolate interfaces, then the security protection is improved, but the device complexity increases
Solution Approach 1:
The system implements self-service security control where the changeover switch unit automatically responds to authentication results without requiring manual intervention. When a computer authenticates successfully, the switch automatically connects the corresponding USB interface to the imaging control unit; when authentication fails, the switch automatically isolates the interface, eliminating the need for complex manual security management.
Solution Approach 2:
The changeover switch unit serves multiple functions: it physically isolates unauthorized interfaces, enables legitimate data transmission for authenticated computers, and manages communication paths between different USB interfaces and the imaging control unit. This multi-functionality reduces the need for separate security mechanisms.
Data Source
AI summary
Provided is an imaging device having an information protection function, comprising an imaging control unit, an interface control unit, and at least two interfaces, and further comprising a changeover switch unit provided between the interfaces and the interface control unit, configured to change over the physical communication or physical isolation between the interfaces and the interface control unit. The imaging device provided in the solution maintains the physical communication or physical isolation between the interfaces and the interface control unit via the changeover switch unit, reduces the possibility of communicating between the interfaces via the interface control unit, thus avoiding the leakage of user data via the communicated interfaces, and reducing potential network security risk.