Portable Information Terminal Code-Image Deletion for Camera Security
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Solution Overview
Problem
Existing portable information terminals with cameras struggle to prevent the external leakage of images captured for image processing targets, particularly in sensitive areas where confidentiality is a concern.
Innovation Solution
A portable information terminal equipped with a volatile memory unit for temporary storage and a non-volatile memory unit for settings, along with a mode selection unit to manage captured images, allowing for deletion or forced deletion of images from the non-volatile memory, thereby preventing external leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the camera mounted on the portable information terminal is used for capturing images of the image processing target, then the ease of operation is improved, but the risk of external leakage of confidential information increases
Solution Approach 1:
The memory system is segmented into volatile memory (first memory unit) for temporary storage during processing and non-volatile memory (second memory unit) for persistent storage. By controlling which memory unit stores captured images and implementing selective deletion from the non-volatile memory, the system segments the storage functions to balance accessibility with security, preventing external leakage while maintaining ease of operation for code reading tasks
Solution Approach 2:
The system changes the storage parameter (memory unit selection) and deletion parameter (timing and condition of image deletion) to resolve the contradiction. By dynamically selecting whether to store images in volatile or non-volatile memory and controlling deletion timing, the system adapts to different operational requirements, allowing easy code reading when needed while preventing image leakage when confidentiality is paramount
2Reliability
If the captured image is stored in the non-volatile memory unit, then the reliability of data retention is improved, but the risk of information leakage increases
Solution Approach 1:
The system performs preliminary deletion of captured images from the non-volatile memory unit after the image processing is completed and the information has been extracted. By proactively removing the stored images before potential external access can occur, the system ensures data retention during the necessary processing period while preventing subsequent information leakage
Solution Approach 2:
The system discards the captured image data from the non-volatile memory unit after the useful information has been extracted through image processing. The image data is recovered (processed) to extract necessary information, then deliberately discarded (deleted) to prevent leakage, while the extracted information is retained for continued use
3Object-affected harmful factors
If the captured image is deleted from the volatile memory unit without storing in non-volatile memory, then the security is improved, but the loss of information occurs
Solution Approach 1:
The system performs preliminary extraction of necessary information from the captured image stored in volatile memory before deleting the image data. By first acquiring the needed information through image processing while the image is still accessible in volatile memory, then deleting the image, the system prevents leakage while avoiding loss of the extracted information which is retained for continued use
Data Source
AI summary
The problem is to prevent external leakage of images captured by a camera when using a camera mounted on a portable information terminal for imaging of image processing targets. The solution means that the security mode deletes the code image Ic generated by the rear camera 33 from the volatile memory 61 without storing it in the non-volatile memory 62 (step S604 in FIG. 6D). In the security mode, instead of this operation, a step of forcibly deleting the code image Ic stored in the non-volatile memory 62 from the non-volatile memory 62 may be executed. With this configuration, by selecting the security mode, the code image Ic generated by the rear camera 33 is deleted, so there is no leakage to the outside.