RU209564U1 - ACOUSTIC LEAKAGE PROTECTION DESK - Google Patents

Abstract

The utility model relates to the production of office and home furniture and is aimed at ensuring the safety of information from unauthorized access. The technical result of the proposed utility model, which consists in ensuring the information security of work by reducing the likelihood of hidden access to confidential acoustic information, reducing labor intensity and the likelihood of errors by eliminating the need to divert attention to maintenance - periodic recharging of the device, increasing the safety of use by eliminating from the design any emitters, is achieved by a table with protection against leakage of acoustic information, including a table top, legs, vertical side walls and a drawer, characterized in that the bottom and inner side surfaces of the drawer are covered with sound-absorbing material with a sound absorption coefficient of at least 0.4 in the acoustic range from 250 Hz to 2000 Hz. 2 w.p. f-ly, 1 ill.

Description

The utility model relates to the production of office and home furniture and is aimed at ensuring the safety of information from unauthorized access.

A desk is known, including a tabletop, a support and four legs (US Pat. RU 2717, published on September 16, 1996). The disadvantages of the known solution include the impossibility of restricting the access of unauthorized persons to information that may be on any media directly on the table or in the immediate surrounding space.

A desk (options) is known, including a lid, legs, a vertical side wall and drawers (U.S. Pat. RU 2421117, publ. 20.06.2011. Bull. No. 17). To limit the access of unauthorized persons to confidential information in the lid and the vertical side wall, according to a well-known solution, at least one slotted hole can be made that communicates with the cavity of the drawer. Materials containing confidential information are supposed to be lowered into the drawer through a slotted hole.

The disadvantages of the known solutions include the fact that the technical result - ensuring the safety of information - is achieved only in relation to information on a flat material carrier that can be placed through a slot in a drawer. It can be, for example, paper sheets with the text of an agreement or contract. But this does not ensure the confidentiality of acoustic information, for example, transmitted in the form of human speech when discussing the same agreement or contract in the room where the table is located, made according to a well-known solution.

It is known that there are numerous methods of covert access to confidential information using, in particular, mobile communication devices in case of unauthorized remote activation of the microphone, as well as from leakage through the speech channel in case of unauthorized activation of the "voice recorder" function. For this purpose, special software can be used, secretly installed on a mobile phone or smartphone (The secret way to listen to the surroundings using a smartphone. [Electronic resource]. URL: https://hi-tech.mail.ru/news/54039-sekretnyy -sposob-ustanovit-proslushku-s-pomoschyu-svoego-smartfona/; date of access: 07/21/2021). To prevent the leakage of confidential information, so-called acoustic safes can be used, among other things.

Known acoustic safe "Spysonic Casket-2", including a hull structure made of wood-based materials with built-in information security devices ("Spysonic Casket-2" - acoustic safe with ultrasonic interference. [Electronic resource]. URL: https://infosecur. ru/product/oborudovanie-dlya-zashchity-informatsii/akiisticheskie-seyfy-zashchita-sotovoy-svyazi/spaysonik-shkatulka-2-akusticheskiy-seyf-s-ultrazvukovoy-pomekhoy/: date of access: 21.07.2021). According to a well-known solution, information security devices are a set of ultrasonic emitters located inside the housing structure, associated with autonomous power sources and creating constant noise interference in close proximity to the microphone of a mobile communication device located nearby.

The disadvantages of the known solution include the need to use power sources that require periodic recharging, and special requirements for the location of the device relative to a person to protect the health of the latter: “practically all ultrasonic radiation remains inside the box, therefore, an unlimited long-term use of an acoustic safe at a distance of at least 20 cm from human head” ([Electronic resource]. URL: https://spycase.ru/ru/acoustic-safes-smartphone-protection/50-safebox2.html; accessed: 07/21/2021). These requirements, despite the simplicity of their implementation, nevertheless complicate the operation, so they require the distraction of users' attention. In addition, the disadvantages of the known device include the limited capacity of its housing structure to accommodate mobile communication devices - an average of up to twenty smartphones. In some cases, this can also bring some inconvenience.

The closest in terms of essential features - the prototype of the claimed utility model - is a desk (options), including a lid, legs, a vertical side wall and drawers (US Pat. RU 2421117, publ. 20.06.2011. Bull. No. 17). To limit the access of unauthorized persons to confidential information in the lid and the vertical side wall, according to a well-known solution, at least one slotted hole can be made that communicates with the cavity of the drawer. Materials containing confidential information are supposed to be lowered into the drawer through a slotted hole.

The disadvantages of the known solutions include the fact that the technical result - ensuring the safety of information - is achieved only in relation to information on a flat material carrier that can be placed through a slot in a drawer. It can be, for example, paper sheets with the text of an agreement or contract. But this does not ensure the confidentiality of acoustic information, for example, transmitted in the form of human speech when discussing the same agreement or contract in the room where the table is located, made according to a well-known solution.

The technical problem to be solved by this utility model is to eliminate the shortcomings of the prototype - the creation of a desk with a device for protecting confidential information, which reduces the likelihood of eavesdropping using devices that may contain a microphone (computers, telephones, bugs, etc. ) located in its internal space, in which it is located, as well as an additional technical task is to ensure the physical safety of these devices (protection against theft) and reduce the likelihood of removing any information over the air.

The solution of the set technical problem is achieved through the combined use of the following design measures:

making a table with one or more drawers;

the use of one or more drawers of the table to accommodate confidential information carriers and mobile communication devices that can be used to provide hidden access to confidential information;

use as a means of protecting confidential information from access by means of mobile communication devices isolating the internal cavity of the drawer used to accommodate mobile communication devices, materials that block the passage of radio waves.

The sound absorbing element may be in the form of fabric, non-woven material, etc. (not included in the application).

The author conducted a series of experiments. The Bauman acoustic cloth was used for the experiments (https://fabricmoscow.ru/catalog/akustika/). These fabrics pass the test of ISO/EN 354, ISO 11654 and DIN EN 29053 and are of unsurpassed quality in every sound range. Acoustic fabrics allow you to control and optimize the influence of extraneous noise, providing not only pleasant acoustics, but also attractive design solutions.

In this case, several types of fabric were used with a single NRC value from 0.4 to 0.9 (https://www.creationbaumann.com/en/Acoustic-fabrics-for-acoustics-and-aesthetics-in-harmony-18707.html )

A single NRC value was calculated as the arithmetic mean of the sound absorption coefficient at acoustic frequencies of 250 Hz, 500 Hz, 1000 Hz, 2000 Hz (see https://stroy-master.com/consult/konsmatl.php).

This coefficient was chosen because it is calculated for sound absorption in the acoustic range from 250 Hz to 2000 Hz, which approximately corresponds to human speech (which must be attenuated as much as possible to solve the technical problem).

For the experiment, we used a table * (standard written for a leader) a bedside table with two drawers. The bottom and inner side surfaces of one of the boxes were covered with sound-absorbing material (factory fabric). The fabric used was different with an NRC coefficient from 0.4 to 0.9. The second box was not covered with such material.

During the experiment, a Samsung Galaxy A12 recording device was placed in such a box % 25D0% 25Al% 25D0% 25BC% 25D0% 25B0% 25D1% 2580% 25D1% 2582% 25D1% 2584% 25D0% 25BE% 25D0% 25BD% 25D1% 258B & utm_source = xml_ymarket_msk & utm_content = 214_SAMSUNG_SM-A125FZBUSER & utm_term = 1452260 & ymclid = 16318527684755743711100002) and the taped acoustics (drawers moved). Acoustic source - human speech at a distance of 1 meter.

As a result of the experiment, it was found that even when using a material with an NRC of 0.4, significant results are noticeable. So, recorded by a device in a closed soundproof box, whispered and quiet speech was almost unintelligible. Whereas the same speech, recorded by a device located in a box without noise insulation, was legible enough to understand the meaning of the transmitted information.

Thus, the experiment showed that the use of sound-absorbing material with an NRC of 0.4 already significantly reduces the likelihood of listening with devices that may contain a microphone (computers, telephones, bugs, etc.) placed in its internal space, the room in which she is located.

The design of the table proposed as a real utility model is illustrated by drawings. In FIG. 1 shows one possible implementation of this solution. It includes a tabletop 1, legs 2, vertical side walls 3 and drawers 4.

In FIG. 1 shows an example of the proposed table, in which two drawers 4 are installed. This does not exclude other versions that differ in the number of drawers 4. Drawers 4 can be equipped with protection devices against unauthorized extension (not shown in Fig. 1). Various locks known from the prior art can be used as such devices. Their particular design and construction are not protected by the present application.

The bottom and inner side walls of the drawers are covered with a material that blocks the passage of radio waves. The surface of the tabletop 1, facing the inner space of the upper drawer, is also covered with a material blocking the passage of radio waves. The method of fastening the material can be any known from the prior art.

It is possible to use Aaronia-Shield fabric as a material.

This material has the following characteristics:

Frequency range of shielded signals

108 dB at 1 kHz,

100 dB at 1 MHz,

60 dB at 100 MHz,

44 dB at 1 GHz,

30 dB at 10 GHz.

Shielding efficiency

Against static fields: 99.9999% to 99.99999% (grounded only)

Against weak electric fields: 99.9999% to 99.99999% (grounded only)

Material - Stainless steel

Color - Stainless steel

Temperature limit - 1200°C

The table proposed as a real utility model works as follows.

Before starting work, for example, before a meeting or other discussion during which confidential information will be announced, mobile communication devices or other devices are placed in drawers where information can be leaked over the radio channel of the meeting participants. You can also put other carriers of confidential information there. Drawers slide inside the table. The drawers can be closed with anti-tamper devices.

The material blocks the passage of radio waves and, due to this, prevents the remote covert activation of microphones, cameras and other information transmitted over the radio from mobile communication devices and other similar devices (where radio transmission is possible).

After the work is completed, mobile communication devices and other carriers of confidential information are removed from the drawers.

Obviously, the use of such material will not give a 100% chance of blocking any radio signal in the range from 900 MHz to 3 GHz inside such products (all major digital standards work in this range - Wi-Fi, GSM, Bluetooch, etc.), but will significantly reduce the likelihood of removing such information (depending on the location of the radio signal transmitter).

The technical result of using the proposed utility model is to ensure information security of work by reducing the likelihood of hidden access to confidential acoustic information, reducing labor intensity and the likelihood of errors by eliminating the need to divert attention to maintenance - periodic recharging of the device, increasing the safety of use by eliminating from the design of which or emitters.

Claims (3)

1. A table with protection against acoustic information leakage, including a tabletop, legs, vertical side walls and a drawer, characterized in that the bottom and inner side surfaces of the drawer are covered with sound-absorbing material with a sound absorption coefficient of at least 0.4 in the acoustic range from 250 Hz up to 2000 Hz. 2. The device according to claim 1, characterized in that the table top surface facing the inner space of the upper drawer is also covered with sound-absorbing material with a sound absorption coefficient of at least 0.4 in the acoustic range from 250 Hz to 2000 Hz. 3. The device according to claim. 1, characterized in that, in addition to using a sound-absorbing material, the bottom and inner side surfaces of the drawer are covered with a material that blocks the propagation of radio waves.

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