The method of localization of technical channels of information leakage

 

The invention relates to the field of radio engineering, in particular to methods of information protection from leakage through technical channels, and can be used for localization of technical channels of information leakage. The technical result - localization with the utmost confidence emitting and non-emitting, visually hidden in the quasi-homogeneous environment elements of technical channels of information leakage (DUI). A feature of the invention lies in the fact that the environment for possible allocation weave probe localized in space ultrawideband impulse signal at consecutive discrete step scanning. When scanning to detect changes in amplitude and phase - frequency characteristics exceeding statically threshold values. These changes and the corresponding images of DUI analyzed according to possible changes of images and possible reviews characteristics of DUI, assessing opportunities DUI, at the same time produce a spatial map of the signs of the presence of frequency characteristics with visual images possible DUI and based on the spatial mapping of images to decide on the localization of DUI. 8 C.p. the protection of information from leakage through technical channels, and can be used for localization of technical channels of information leakage.

One of the conditions of security information from leaking through technical channels is their localization in space (location). Known devices use the principles of electromagnetic induction, detection of nonlinear effects, the detection of the response to the probing signal ("Spy stuff" and device for protection of objects and information. Reference book / Ed. by S. A. Zolotareva. -SPb: DOE, 1996, S. 134-135).

Translation methods using such devices are not always effective, it is often difficult to perform and require considerable time, and sometimes deny the relevance of localization (elements) technical channels of information leakage (DUI).

The closest in technical essence of the proposed method are the methods based on the localization of DUI using non-linear locators (IO), to account for possible a priori characteristics. For example, the presence of elements of the metal ocil metal under irradiation allows to observe the appearance of a signal at the third harmonic, and the semiconductor elements on the second (see Horev A. A. Ways and means of protection inforay and (or) third harmonic, the corresponding single frequency sensing, and have the following disadvantages: limited ability confident localization analysis due to the small number of parameters; the impossibility of selecting specific for each of the frequency components of the spectrum of the probe signal, and hence the filters of the receiver.

An object of the invention is the localization with the utmost confidence as emitting generating active) and non-emitting (regeneriruyuschim - passive), visually hidden in the quasi-homogeneous environment elements DUI.

The solution to this problem is achieved in that environment possible placement of DUI probe localized in space ultrawideband impulse signal at consecutive discrete step-by-step scanning of the reflected signals take to the characteristic frequency spectrum transform them into amplitude - and phase-frequency characteristics containing the full set of probabilistic information about the possible (elements) DUI sequentially during a scan revealed changes of amplitude - and phase-frequency characteristics exceeding statistically installed discrete poramet compliance possible changes in image characteristics of the elements of DUI, form a total image characteristics possible DUI, images obtained characteristics are compared with the images stored in the database, form a visual image of DUI, by comparing the image characteristics, spatial mapping with the visual decide about the reality of the existence of possible DUI localized in space. This localization in space describes the probing signal eliminates the ambiguity of the evaluation phase in the analysis process and the impact of background reflections (to eliminate such error estimates), and also gives the possibility of solving three-dimensional (spatial) localization tasks with the aim of obtaining a visual image of DUI. The adequacy of the amplitude level of a single probe pulse at the required duration and repetition rate provides beskompromissnosti (secrecy) of the sensing process (this is due to the low corresponding to the noise level, the average power of the probing signal in the distribution of energy across the entire frequency spectrum in the natural background noise and it is unlikely the detection of such a signal strobe devices without direct synchronization). Printpreorder in the amplitude-phase-frequency characteristics, contains the full set of probabilistic information about possible DUI, by means of an intermediate transformation of the mutual spectral density of the energy of these signals. When during the scanning of change of amplitude-phase characteristics in excess of statistically discrete set thresholds in full characteristic frequency spectrum make a coherent analysis of these measurements for compliance with possible changes in image characteristics of the elements of DUI, form a total image characteristics possible DUI. Images obtained characteristics are compared with the images stored in the database, generated experimentally or with potential images generated by a particular algorithm. On the basis of comparison of image characteristics, subject to certain assumptions and algorithm final assessment opportunities localizable, DUI on derivative results changing images of amplitude and phase - frequency characteristics obtained when scanning, as well as the simultaneous spatial mapping with the visual image of DUI formed by creating a wide aperture sensing when poeticheskoi processing, decide on the reality of the existence of possible DUI localized in space. This allows you to localize as emitting generating, active) and non-emitting (regeneriruj, passive) elements of DUI.

The invention is illustrated by drawings, where Fig.1 shows a functional diagram of source data for the implementation of the proposed method, Fig. 2 is a functional diagram of an implementation of this method, where indicated: u(t) is the amplitude-time implementation of signal that is reflected in the initial sensing; v(t) is the amplitude-time implementation of the reflected signal at the next step of scanning; m(t) is the amplitude-temporal realization of the additive noise present at the same time with the signal at the initial intubation, n(t) is the amplitude-time implementation of the additive noise that is present simultaneously with the signal of the next scan line, respectively; x(t) is the amplitude-time implementation of signal accepted for initial intubation, y(t) is the amplitude-time implementation of signal received on the next scan line, respectively; (f . ..) - a comprehensive description containing the signs of the presence of the investigated elements DUI, as a function of (is the azone frequencies, which corresponds to the range of manifestations of the full group probable frequency properties of elements DUI priori alleged type.

As the source of the probing signals are pulse signals with a wide frequency spectrum.

When the pursuit of all the possibilities of manifestation of the frequency properties of research-based elements of DUI different types compiled database, including the possibility of predictable recalculations, the characteristics of the density distribution of the probability of the frequency of the localizable properties of DUI.

According to the results of the sensing are explored amplitude - and phase-frequency characteristics corresponding to the reflected signal when scanning with discretes, on the subject appearing in the frequency spectrum components are determined by the elements of DUI.

Amplitude - and phase-frequency characteristics are obtained from comprehensive data (f,...) through intermediate transformations of the mutual spectral density of the energy of the signals u(t) and v(t) recorded at consecutive discrete step-by-step scanning with appropriate implementations of additive noise m(t) and n(t).

Moreover, if the scan is just beginning or detention is>/p>In Fig. 2 shows the following blocks: block 1 - block of image forming frequency characteristics of DUI; section 2 - evaluation unit changes the image frequency characteristics of DUI; block 3 - block formation radiobras DUI; block 4 - block the formation of visual images, DUI; block 5 - block location DUI.

During a scan to detect changes in amplitude and phase - frequency characteristics, statistically greater than the threshold values. These changes and the corresponding images of DUI formed in blocks 1, 2, 4, are analyzed in block 5 for compliance with possible changes of images and image characteristics (elements) of DUI stored in a database or a priori expect. Based on this, assess the possibility of DUI.

At the same time produce a spatial map of the signs of the presence of frequency characteristics with the visual images of themselves possible DUI. While visual images are formed in the block 4, possible DUI get through correlation and optical processing radiobras these DUI formed in the block 3.

Based on the spatial mapping of images to decide on the localization of DUI.

Protich probing signals with a wide frequency spectrum to activate (detection) and analysis of the properties of the various elements of DUI for confident localization of real and relevant.

The proposed method localization of DUI experimentally tested in the frequency range (1 ... 18 GHz). A pulse duration of 100 picoseconds, an amplitude of 200 V, with transverse scanning for synthetic aperture sensing probed environment possible placement of elements DUI range (from a few centimeters to two tens of meters).

Modern development of technical and mathematical base allows to present the main characteristics of the proposed method localization elements DUI the following: the probability of localization is to strive for the unit; the size of the area of search may be unlimited; the accuracy of fixing the location of the elements of DUI in the hosting environment may be within units of millimeters - centimeters; the adequacy of the level of the single amplitude of the probing signal comprising units - tens of volts, the duration in tenths of units of nanoseconds, and a repetition frequency in the tens of kilohertz ensures secrecy of the process of sensing (this is due to the low the corresponding noise level, the average power of the probing signal in the distribution of energy across the entire frequency spectrum and it is unlikely the detection of such a signal strobe is ematichesky due to the possible use of high-speed computing technologies and opportunities for development flexible adaptive math software; the proposed device that implements the method of localization, can be made in the form of a portable device with power supply from a standard network or from a stand-alone unit; the estimated cost of production prototype of such a device will not exceed the cost of traditional IO, other known means of control.

Based on the above we can conclude that the proposed method localization makes it possible to achieve a high probability of localization in real time by analyzing information not only about the amplitude (as is customary for traditional IO) fixed frequencies (one, two harmonics), but also about changing the amplitude and phase of the received signal in a wide frequency range taking into account the detection signal emitted by the active elements of DUI, to localize the location of the elements of DUI accurate to units of millimeters - centimeters, with a high stealth to make the localization process elements DUI.

Implementation of the described method, there is no doubt, as it is implemented on elements and nodes produced by the industry of the country.

Claims

1. The method of localization of technical channels is that the probing implement localized in space ultrawideband impulse signal with successive discrete step-by-step scanning the reflected signals take to the characteristic frequency spectrum transform them into amplitude - and phase-frequency characteristics containing the full set of probabilistic information on the possible elements of DUI sequentially during a scan revealed changes of amplitude - and phase-frequency characteristics exceeding statistically discrete set thresholds in full characteristic frequency spectrum make a coherent analysis of these changes for compliance with possible changes in image characteristics of the elements of DUI, form a total image characteristics possible DUI, images obtained characteristics are compared with the images stored in the database, form a visual image of DUI, by comparing the image characteristics, spatial mapping with the visual decide about the reality of the existence of possible DUI localized in space.

2. The method according to p. 1, characterized in that the localization in space of the reflected signal is produced with the exception of the influence of background reflections.

3. The method according to PP.1 and 2, characterized in that the localization of the echo signal produced in douht signal average power in the distribution of energy across the entire frequency spectrum in the natural background noise.

5. The method according to PP.1-4, characterized in that the reflected signals take to the characteristic range of frequencies and is converted into an amplitude - and phase-frequency characteristics containing the full set of probabilistic information about possible DUI, by means of an intermediate transformation of the mutual spectral density of the energy of these signals at successive discrete step-by-step scanning.

6. The method according to PP.1-5, characterized in that the images obtained characteristics are compared with the images stored in the database, generated experimentally or with potential images generated by a given adaptive algorithm.

7. The method according to PP.1-6, characterized in that the decision about the reality of the existence of possible DUI localized in space take on the basis of comparison of image characteristics on the basis of certain assumptions and algorithm final assessment opportunities localizable, DUI on derivative results changing images of amplitude and phase - frequency characteristics obtained when scanning.

8. The method according to PP.1-7, characterized in that from the full group probabilistic information about possible DUI distinguish the processes of identification (analysis).

9. The method according to PP.1-8, characterized in that one of the criteria for making decisions about the reality of the existence of DUI is a spatial mapping of the described characteristics (highlighted relevant characteristics) visual image of this DUI formed by creating a wide aperture sensing when the transverse scanning with the purpose of obtaining radiobras DUI (with appropriate permission) and its correlation, and optical processing.

 

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FIELD: technologies for preventing interception of data.

SUBSTANCE: transferred signal is concealed via adding noises to communication line in speech frequency range with linear addition of speech data signal with noise signal of higher level. Concealment is removed via adaptive filtration of received signal with compensation of noise component and separation of data component. Addition of noises to communication line is performed from the side of sensor. Noise signal during addition of noises and adaptive filtration is formed of a sum of counts of several noise series with nonevent sizes via their random querying. At the beginning of each communication session a signal is sent to side of receiver, characterizing order of querying of series, and starting signal, providing for synchronism of noises addition and filtering processes. All operations are performed by means of microprocessors, mounted on both sides of communication line, dependently of loaded software providing for change of direction of transmission and protection of speech data signal. Invention allows to simplify protection while providing for absolute confidentiality of transmitted data.

EFFECT: higher reliability.

6 cl, 4 dwg

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