Secret Information Image Display Control for Wireless LAN Security
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Solution Overview
Problem
Existing communication systems for wireless LANs do not effectively control the display timing of secret information images, making them vulnerable to unauthorized access, especially in public settings where strangers may inadvertently or intentionally view sensitive information.
Innovation Solution
A communication apparatus and method that includes display control means to show a secret information image only upon receiving a notification signal indicating preparation for shooting, and stops displaying the image when the information is obtained, using a dummy image for focus adjustment to minimize exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If secret information is displayed continuously or in advance, then ease of operation is improved, but security is worsened due to unauthorized viewing
Solution Approach 1:
The system performs preliminary actions by displaying a dummy image before the actual secret information image, and prepares the shooting function in advance. This allows the receiving device to set focus and verify camera functionality without exposing secret information prematurely, resolving the contradiction between ease of operation and security.
Solution Approach 2:
A dummy image serves as an intermediary between the device states, replacing the actual secret information image during the setup phase. This intermediary allows the receiving device to perform necessary preparations (focus adjustment, camera verification) without exposing the real secret information, thus maintaining security while enabling smooth operation.
2Ease of operation
If secret information image is displayed for longer duration, then ease of operation is improved, but security is worsened due to increased exposure risk
Solution Approach 1:
The system uses periodic action by sequentially displaying different images (dummy image first, then actual secret information image) at specific intervals. The secret information image is displayed only after the receiving device is ready and only for the minimum necessary duration until shooting completion, reducing exposure time while maintaining operational ease.
Solution Approach 2:
The display timing and content are made dynamic rather than static. The system adjusts what is displayed based on the real-time state of the receiving device (whether shooting function is ready), optimizing the balance between ease of operation and security by displaying secret information only when necessary and for the shortest possible time.
3Reliability
If dummy image is used for focus adjustment, then security is improved, but device complexity is worsened
Solution Approach 1:
The display unit serves multiple functions: displaying dummy images for focus adjustment, displaying actual secret information images, and providing visual feedback about the current system state. This multi-functionality reduces the need for separate components and keeps the overall device complexity manageable while improving security.
Solution Approach 2:
The system uses the existing display unit and shooting function for dual purposes (focus adjustment and secret information transmission) without requiring additional specialized components. The dummy image leverages the same display hardware already present in the device, avoiding increased complexity while enhancing security.
Data Source
AI summary
A communication apparatus includes display control means for displaying a secret information image containing secret information, and secret information image generation means for, upon receiving a notification signal indicating that a preparation for shooting is completed from another communication apparatus, instructing the display control means to display the secret information image. Note that the display control means displays a predetermined dummy image, and the notification signal is a notification signal indicating that a shooting preparation has been completed based on the dummy image. Further, when the secret information image generation means receives a notification signal indicating that secret information contained in a secret information image is obtained from another communication apparatus, the secret information image generation means instructs the display control means to stop displaying the secret information image.