RU2344470C1 - Method of visual information protection and device for its realisation - Google Patents

Abstract

FIELD: information technologies.

SUBSTANCE: result is provided by introduction of guide medium between information region and user, at that guide medium is formed by at least one wave guide and oriented so that direction of wave information signal transfer matches with line of user look or deviates from it by angle less than 30° and creation of darkened area in this medium, which absorbs wave information signal traveling to the side of detached observer, which is located on one side in respect to guide medium together with information user.

EFFECT: exclusion of unauthorised view of information by detached observer and simultaneous provision of useful information to user.

4 cl, 2 dwg

Description

The invention relates to computer technology, and more particularly to methods for protecting visual information and devices for its implementation, which can be used in almost all computer systems.

Known methods for protecting visual information from unauthorized viewing by an outside observer using window blinds, while protecting visual information only occurs if the outside observer is on one side of the blinds and the user and visual information are on the other side of the blinds.

Also known are methods of protecting visual information from unauthorized viewing by an outside observer using partitions that enclose the location of the visual information area and the user. However, such methods require a large space for partitions and do not exclude unauthorized viewing in the case when an outside observer is next to the user.

The closest technical solution in relation to the claimed object is a method of protecting visual information and a device for its implementation, described in patent RU 2126988, cl. G06F 12/14. In this method, the protection of visual information is carried out by introducing between the user and the area of the visual information of the optoelectronic environment, which generates interference signals introduced into the useful visual information, and which switches synchronously with the switching of the interference signal and when an interference occurs, it is dimming, so that the user only sees useful information he needs, and an outside observer sees interference.

This known method is complex, expensive and can only be used for visual information displayed on the display, and does not preclude the unauthorized reading of information reproduced by mechanical means, such as a computer keyboard, ATM, code lock or as a result of a user action, such as dialing a code, password on the keyboard.

The technical result of the present invention is to exclude unauthorized viewing of visual information by an outside observer, regardless of what means it is reproduced, and to simplify the design of the device that implements the proposed method.

The technical result is achieved by the fact that in the proposed method of protecting visual information by introducing between the information storage area and the user of this information an optical medium, according to the invention, a waveguide medium is used as an optical medium, the medium is arranged so that the direction of transmission of the information wave signal coincides with the line the user's gaze or deviates from it by an angle of less than 30 °, and create a darkened zone in this medium that absorbs a wave of information signal going towards one hundred onnego observer who is a user of information on one side of the waveguide medium. In the device for implementing the proposed method according to the invention, the optical device is at least one waveguide oriented so that the direction of transmission of the information wave signal coincides with the user's line of sight or deviates from it by an angle of less than 30 °, and the waveguide walls are made or covered the material absorbing the wave signal going towards the side observer, while the end side of the waveguide facing the area of visual information is its input, and the end side and facing the user - it yields.

The presence of a darkened zone in the waveguide medium ensures that unauthorized viewing of information by an outside observer is excluded, even if it is next to the user of information, and the use of the waveguide limits the viewing angle of the input visual information.

It is advisable that the waveguide has a height, the value of which is from 0.3 to 10 distances between its nearest walls. The indicated value of the height of the waveguide, and therefore the height of the shaded area, guarantees optimal complete protection of visual information. Reducing the height of the waveguide does not exclude the possibility of unauthorized viewing of information, and increasing the height creates inconvenience to the user, i.e. part of the information area may be overlapped.

It is also advisable that the waveguide be a thin-walled cell, the walls of which are oriented along the direction of transmission of the wave signal and are made of material or coated with material that absorbs the wave signal going towards the side observer.

The implementation of the waveguide in the form of a thin-walled cell simplifies the technology of its manufacture.

The invention will be further described in detail in the description with reference to the accompanying drawings, in which:

Figure 1 depicts schematically the proposed device for implementing the method of protecting visual information, a side view in section;

Figure 2 - one of the embodiments of the waveguide used in the device shown in figure 1.

The essence of the proposed method is as follows.

To protect the visual information from unauthorized viewing by the outside observer between the user of the visual information and the area of this information, an optical medium is introduced in the form of a waveguide medium, which is positioned so that the direction of transmission of the waveform of the information coincides with the user's line of sight or deviates from it by an angle of less than 30 ° . In this environment, a darkened zone is created that absorbs a wave of information going towards an outside observer. In this case, the observer is with the user of information on one side of the waveguide medium, but thanks to the darkened zone, he does not see the information that the user receives.

A device that implements the method and shown in figure 1, contains an optical device 1 located between the information area 2 and the user 3 of this information.

The device 2 is at least one waveguide 4, while the number of waveguides is selected depending on the size of the information area 1.

Figure 1 shows three waveguides 4, each of which is oriented so that the direction of transmission of the waveform information signal 5 coincides with the line 6 of the gaze of the user 3. The walls 7 of each waveguide 4 are made or covered with material that absorbs the waveform 8 going towards the side observer 9. The end side of each waveguide 4, facing the region 2, is the input of visual information, and the end side facing the user 3 is the output of visual information.

The height of each waveguide 4 has a value that is from 0.3 to 10 distances between the nearest walls.

The waveguide can be made in the form of a glass rod, the side surface of which is covered with material that absorbs the wave signal going to the side of an outside observer, or is made opaque.

To simplify the manufacturing technology of the waveguide, it is advisable to make it in the form of a thin-walled cell 10 (Fig. 2), the walls 11 of which are directed along the wave signal and are made of material or coated with material absorbing the wave signal 8, going towards the side observer 9. In FIG. 2 shows several waveguides, each of which is made in the form of a thin-walled cell 10.

In the case when the information area 2 is formed using the keyboard, the sides of this area are not protected by the waveguide. Therefore, partitions 12 are additionally installed (FIG. 2), and the side where the keyboard is located is made in the form of soft patches 13 fixed at one end to the waveguide or partitions 12. Since the other end of the patches 13 remains free, they hang and do not interfere with entry the user's hands in the information area and at the same time close the review of information to an outside observer.

As the material absorbing the wave signal 8, going towards the side observer 9, any dark paint that absorbs the light signal, for example black, is used.

The device operates as follows.

The waveguides 4 send a wave signal 5 of information to the user 3, and their walls 7, covered with material, absorb the wave signal 8, which is directed towards the side observer 9, and form the so-called darkened zone. Therefore, useful information does not reach the observer 9.

Claims (4)

1. A method of protecting visual information by introducing between the information storage area and the user of this information an optical medium, characterized in that a waveguide medium is used as the optical medium, the medium is arranged so that the direction of transmission of the wave information signal coincides with the user's line of sight or deviates from an angle of less than 30 °, and create a darkened zone in this medium, absorbing the wave of information that goes towards an outside observer who is with the user inf formations on one side of the waveguide medium. 2. The device for implementing the method according to claim 1, comprising an optical device located between the information storage area and the user of this information, characterized in that the optical device is at least one waveguide oriented so that the direction of transmission of the information wave signal coincides with the user's gaze line or deviates from it by an angle of less than 30 °, and the waveguide walls are made of material or coated with a material that absorbs the wave signal going towards the side of observation of Tell, wherein the waveguide end face facing the field of visual data is its input, and the end side facing the user, - its output. 3. The device according to claim 2, characterized in that the waveguide has a height, the value of which is from 0.3 to 10 distances between its nearest walls. 4. The device according to claim 2, characterized in that the waveguide is a thin-walled cell, the walls of which are oriented along the direction of transmission of the wave signal and are made of material or coated with material that absorbs the wave signal going towards the side observer.

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