RU2769548C1 - Method for passive protection of confidential information carriers from unauthorized access to protected confidential information - Google Patents

Abstract

FIELD: computer technology.

SUBSTANCE: invention relates to the field of computer technology for the protection of confidential information. According to the invention, the protective screen is made composite, the first element of the composite protective screen is installed on the carrier of confidential information and in front of the service operator, as which a polymer film made of optically transparent material is used, characterized by the property of polarization of passing optical rays emanating from the protected carrier of confidential information, with the ability to read the protected information without its distortion only by the service operator. The second element of the composite protective screen, also made of a polymer film of an optically transparent material with polarization of optical rays passing through it, the plane of polarization of which is positioned orthogonally relative to the plane of polarization of the first element and placed behind the service operator and in front of a potentially possible outside observer.

EFFECT: increased protection of confidential information carriers from unauthorized access by outsiders to protected confidential information.

1 cl, 4 dwg

Description

The invention relates to the field of means of protecting confidential information displayed on screens, monitors, tablets, displays, etc. devices from unauthorized access by third parties and to methods of counteracting optical reconnaissance means.

The relevance of the problem being solved is based on the need to create means to protect confidential information displayed on screens, monitors, tablets, displays, etc. devices, to exclude reading by outside observers or copying using photo and filming devices.

A device is known that contains an optoelectronic screen, raster, the protective layers of which are made of a single plate of opaque material with holes, as well as other elements of the confidential information protection system - optical signal amplifiers, an image doubling unit, a synchronization unit, etc. (RF patent No. 2233488 , IPC G09G 1/08, published 07/27/2004).

This device, used in a known manner, contains rather complex elements and is provided with a relatively complex system of their activation and operation.

There is a method of passive protection of a carrier of confidential information (document) from an outside observer by making a removable element in the form of an electromagnetic screen that prevents contactless reading of data from an electronic device and/or writing data to it (RF patent No. 2422899, IPC G06K 19/073, publ. . June 27, 2011).

In the known method, multiple additional operations are proposed by bending and unbending the product, and the protective screen has a complex device.

The task of the authors of the present invention is to develop a simple and effective way to passively protect visualization tools from unauthorized access to protected confidential information.

The technical result provided by the use of the proposed invention is to ensure the creation of a more efficient and easy-to-use protection of confidential information carriers from unauthorized access by unauthorized persons to protected confidential information than in the prototype.

The specified task and the technical result provided by using the proposed invention are achieved by the fact that, in contrast to the known method of passive protection of confidential information carriers from unauthorized access to protected confidential information, including the assembly of a confidential information carrier protection system (monitor screen), on which a protective a screen characterized by the ability to optically distort confidential information to protect it from being read by outside observers, according to the invention, the protective screen is made composite, one element of the composite protective screen, which is used as a polymer film made of an optically transparent polymer, characterized by the property of polarization of transmitted optical rays from protected carrier of confidential information, with the possibility of reading such information without distorting it only by the service operator, which is installed on the carrier of confidential information and between the operator, and another element of the composite protective screen, also made of an optically transparent polymer, the polarization plane of which is orthogonally oriented relative to the polarization plane of the first element, is placed behind the operator and in front of a potential outside observer.

The proposed method is explained as follows.

In FIG. 1 shows a general view of the proposed passive protection system, where 1 is the protected information carrier (monitor) and the operator, 2 is the first element of the composite protective screen (polymeric polarizing film), 3 is the second element of the composite protective screen (polymeric polarizing film), 4 - outside observer, 5 - type of protected object for an outside observer.

On the confidential information carrier - screen (PC monitor, etc.), the first element of the composite protective screen is installed (if not available), which is made in the form of a film of optically transparent polymer with polarization of passing optical rays from the protected confidential information carrier to the operating PC operator. The second element of the protective screen, also made in the form of a film of an optically transparent polymer with polarization of transmitted optical rays, is oriented so that its polarization plane is orthogonally directed relative to the polarization plane of the first element of the protected screen. In the proposed method, the light flux passing from the illuminated protected screen with confidential information to the eyes of an outside observer (or optical device) will be interrupted. In this case, there will be a physical phenomenon of attenuation of a polarized light wave when passing through an optically transparent body, in which the plane of polarization is oriented orthogonally relative to the plane in which the light wave propagates. Thus, the space between the polarizers will not be visually accessible to the observer who will be behind the polarizers. As a result, the light flux blocked in this way does not reach an outside observer. And, therefore, the proposed composite protective screen effectively protects confidential information placed on the monitor screen from its perception by an outside observer.

Thus, when using the proposed method, a more efficient and easy-to-use system for protecting confidential information carriers from unauthorized access by unauthorized persons to protected confidential information is provided than in the prototype.

The possibility of industrial implementation of the proposed method is confirmed by the following example.

Example.

The proposed method was implemented in laboratory conditions, using layouts of a confidential information carrier - a protected screen, and a composite protective screen (in accordance with the diagram of Fig. 1).

The PC monitor screen and soldering station display were used as carriers of confidential information. At the same time, a polarizing film (the first element of the protective screen) was applied to the monitor screen by the manufacturer, and it was installed again on the display of the soldering station.

The results of visual control, confirming the claimed effect, are shown in Fig. 2, 3, 4.

In FIG. Figure 2 shows an example of the operation of the proposed protection method (view for a service operator).

In FIG. Figure 3 shows an example of the operation of the proposed protection method (view for an outside observer).

In FIG. Figure 4 shows an example of the operation of the proposed protection method using a composite protective screen to protect information displayed on the monitor screen.

As can be seen from the photographs (Fig. 2, 3, 4), confidential information is not available to an outside observer due to its distortion (partial/total shading) when two protective screens with different polarization planes are applied.

As confirmed by experimental studies, when using the proposed method provides a more efficient and easy-to-use protection of confidential information carriers from unauthorized access by unauthorized persons to protected confidential information than in the prototype.

Claims (1)

A method for passive protection of confidential information carriers from unauthorized access to protected confidential information, including: assembling a protection system, where said protection system is made in the form of a composite protective screen, and the confidential information carrier is made in the form of a screen or monitor, and characterized by the ability to optically distort confidential information for its reading by outside observers, while the protective screen is made composite, the first element of the composite protective screen, which is used as a polymer film made of an optically transparent material and characterized by the property of polarization of transmitted optical rays emanating from the protected confidential information carrier, while the polymer film is made with the possibility of reading such information without distorting it only by the service operator, where the polymer film is installed, in the absence of the initial protective film on the carrier, before serving operator, and the second element of the composite protective screen, also made of the same type of polymer film, is oriented by the polarization plane orthogonally relative to the polarization plane of the first element and placed behind the operating operator and in front of a potential outside observer.

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