Privacy protection display implementation method based on visual passwords

A privacy protection and visual password technology, applied in the field of security display, can solve the problems of high cost, large radiation, and large health damage, and achieve the effect of low cost

Inactive Publication Date: 2015-01-07
INST OF INFORMATION ENG CAS
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  • Abstract
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  • Claims
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Problems solved by technology

[0009] The technology of the present invention solves the problem; aiming at the problems of low screen brightness, large radiation, large health damage and high cost in the existing security display technology, it provides a method for realizing privacy protection display bas

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  • Privacy protection display implementation method based on visual passwords
  • Privacy protection display implementation method based on visual passwords
  • Privacy protection display implementation method based on visual passwords

Examples

Experimental program
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Example Embodiment

[0043] Example 1: Using the stream cipher algorithm Rabbit as figure 1 The standard RGB screen safety display of the parameter d=2 of PRNG in PRNG, wherein the arrangement of RGB sub-pixel is as follows Figure 5 As shown, the screen size is 1280×1024, and the pixel color is true color 24 bits. Will figure 1 The refresh rate of the screens in the two display interface cards is set to 60Hz. figure 1 In the security configuration module, select the private browsing mode, through figure 1 The middle viewing area configuration module sets the distance between the two liquid crystal layers to be 2 pixels side length. In this working mode figure 1 The specific workflow of each module is as follows:

[0044] (1) A 64-bit random initialization vector IV is preset between encryption module 1 and encryption module 2;

[0045] (2) The synchronous clock module sends a 72-bit clock signal CLK (hour: minute: second: millisecond) to the encryption module 1 and the encryption module 2; ...

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Abstract

The invention relates to a privacy protection display implementation method based on visual passwords. A pseudo random number generator (PRNG) is preset between an encryption module 1 and an encryption module 2, and a distance parameter between two liquid crystal layers is set to be d through a visual area configuration module, so that the size of a visual area is controlled, and the screen refresh frequency in two display interface cards is set to be 60 Hz. A common browse mode or a private browse mode is selected through a security configuration module, and a privacy protection display based on visual passwords can work normally after deployment is completed. The dual purposes of preventing candid camera and electromagnetic leakage are achieved, the screen luminance will not be reduced, radiation is prevented from being largely increased, and the cost is much lower than the cost of building a shielding room.

Description

technical field [0001] The invention relates to a method for realizing a privacy protection display based on a visual password, which belongs to the field of security display technology, and in particular to the superimposition and visual area analysis of two liquid crystal layers based on a visual password. The content of the device will not be peeped by others from the side, and it also has the advantage of preventing electromagnetic leakage. Background technique [0002] In a computer system, a display device is an important channel for users to obtain information. However, the content on the ordinary display device is easy to be peeped by others from the side, resulting in the leakage of sensitive information. Therefore, it is an important research content to design a privacy-preserving display with controllable display area so as to realize the security protection of the content on the display device. [0003] With the continuous improvement of the manufacturing level...

Claims

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Application Information

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IPC IPC(8): G09G3/36G02F1/133
Inventor 刘峰郭腾
Owner INST OF INFORMATION ENG CAS
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