JP2003263692A - Eavesdropping wave monitoring system and its program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a security function for a radio wave by always monitoring an eavesdropping wave by using a network, and issuing warning at the time of detecting the eavesdropping wave. <P>SOLUTION: This eavesdropping wave monitoring system (host computer 4) in which at least one receiver 1 (2, 3) is connected through a network 5, is provided with an eavesdropping wave monitoring part 43 for monitoring the presence/absence of an eavesdropping wave by fetching at least electric field strength data through the receiver 1 (2, 3), and comparing the electric field strength data with electric field strength data (environment radio wave DB 9) in a state that any eavesdropping wave does not exist, and a warning issuing part 44 for issuing warning according to the monitor result of the eavesdropping wave monitoring part 43. Also, steady reception data in which any eavesdropping radio wave is not included are updated and stored in an always latest state in the environment radio wave DB 9. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiretapping radio wave monitoring system and its program for realizing a security function against wiretapping using radio waves using a communication network.

[0002]

2. Description of the Related Art In recent years, wiretapping using wiretapping devices has become a social problem. The purpose of eavesdropping is very diverse, ranging from interest-oriented things such as listening to conversations in ordinary households to obtaining financial profits by gaining internal information about companies. In particular, current eavesdroppers have become small and have high performance, and some products do not require batteries, and once installed, they continue to emit eavesdropping radio waves semi-permanently unless they break down.

[0003]

When the above-mentioned eavesdropping device is installed in a general household or company, all the information is leaked semipermanently. Further, in the case of a wireless wiretap, not only the attached person but also a general wireless maniac can hear. By the way, as a method for finding the wiretapping device, there is a method of investigating wiretapping radio waves by a professional company, or a visual search for the wiretapping device. However, these methods have a drawback in that a large amount of cost is required because regular surveys are required.

The present invention has been made in view of the above circumstances, and constantly monitors eavesdropping radio waves by using a network and issues a warning when the eavesdropping radio waves are detected, thereby eavesdropping for realizing a security function against wireless radio waves. It is intended to provide a radio wave monitoring system and its program.

[0005]

In order to solve the above-mentioned problems, the present invention is a wiretapping radio wave monitoring system in which at least one radio wave receiver is connected via a network. Eavesdropping radio wave monitoring means for taking in at least electric field strength data and comparing the electric field strength data in the absence of the wiretapping radio waves to monitor the presence or absence of wiretapping radio waves, and an alarm for issuing an alarm depending on the monitoring result by the wiretapping radio wave monitoring means. And generating means. According to the present invention, the eavesdropping radio wave monitoring means captures the electric field strength data via the receiver, compares the electric field strength data in the absence of the eavesdropping electric wave with the electric field strength data, and monitors the presence or absence of the eavesdropping electric wave to activate the alarm generating means. It is possible to provide a wiretapping radio wave monitoring system that has a high security against wiretapping using radio waves and that does not require a wiretapping radio wave investigation work by a specialist by issuing an alarm via the alarm. Further, since the wiretapping radio wave monitoring system is realized by using the existing network, the cost effect is particularly great.

The present invention further includes an environmental radio wave updating means for updating the electric field strength data in the steady state in which the wiretapping radio wave does not exist by using the received data when the wiretapping radio wave does not exist. To do. According to the present invention, the environmental radio wave updating means constantly updates the electric field strength data in the steady state where there is no eavesdropping radio wave using the received data, which enables stable radio wave monitoring regardless of the installation area.

Further, in the present invention, the eavesdropping radio wave monitoring means, when it is determined that the eavesdropping radio wave is present, generates a danger level defined by a frequency including the electric field strength and notifies the alarm generating means. It is characterized by
According to the present invention, it is possible to respond in accordance with the risk level notified by the alarm generation means, and the degree of freedom of the user for the response is increased.

Further, according to the present invention, the alarm issuing means displays the received data monitored by the wiretapping radio wave monitoring means, and at least the danger level and the estimated approximate transmission position according to a user request. Displaying one,
Is characterized by. According to the present invention, the alarm generating means displays at least one of the danger level and the estimated rough transmission position in accordance with the user request, in addition to displaying the received data that changes in real time monitored by the wiretapping radio wave monitoring means. By doing so, data relating to wiretapping can be grasped from various angles, which can be helpful in dealing with it.

In order to solve the above problems, the present invention provides
A wiretapping radio wave monitoring program used in a wiretapping radio wave monitoring system in which at least one radio wave receiver is connected via a network, in which at least electric field intensity data is captured via the receiver and the wiretapping radio wave does not exist. In the computer, the wiretapping radio wave monitoring step for monitoring the presence or absence of wiretapping radio waves in comparison with the electric field strength data in step 1) and the alarm generating step for issuing an alarm depending on the monitoring result by the wiretapping radio wave monitoring means. .
According to the present invention, by causing a computer to execute the above-mentioned eavesdropping radio wave monitoring program, electric field strength data is captured via a receiver, and the presence or absence of eavesdropping electric waves is compared with the electric field strength data in the absence of eavesdropping electric waves. By monitoring and issuing an alarm, security against eavesdropping using wireless radio waves is high, and it is possible to eliminate the need for expert eavesdropping radio wave investigation work.

[0010]

1 is a diagram showing a connection configuration of a wiretapping radio wave monitoring system of the present invention. As shown in FIG. 1, a plurality of receivers 1, 2, 3 and a host computer 4 are connected via a network 5, and the host computer 4 connects the electric fields of the receivers 1, 2, 3 via the network 5. It is configured to capture intensity data. Each of the receivers 1, 2, and 3 has a LAN (Local Area Network) conversion device 6 by a built-in RS232C interface.
It is connected to the network 5 via 7, 8.

The host computer 4, which has received the received data including the electric field intensity data, holds the electric field intensity data in the environment radio wave database (DB) 9 in a state where there is no unnecessary radio wave including the eavesdropping radio wave. The presence or absence of eavesdropping radio waves is determined by comparing the received data obtained from 1, 2, and 3. As the host computer 4, for example, a computer that continuously operates such as a file server is used, and the wiretapping radio wave monitoring program of the present invention is executed in the background. When the eavesdropping radio wave monitoring program detects unnecessary radio waves that are considered to be eavesdropping radio waves, the eavesdropping radio wave monitoring program uses e-mail or the like to contact a terminal device of an administrator (not shown). At the same time, the administrator can monitor the monitoring status on the web screen as well.

FIG. 2 is a block diagram showing functional development of the internal configuration of the host computer shown in FIG. Specifically, the block shown below is configured by a peripheral LSI including a CPU and a memory, and the CPU reads out a program recorded in the memory and sequentially executes the program to realize the function of the block. The host computer 4 includes a communication interface unit 41, a received data capturing unit 42, a wiretapping radio wave monitoring unit 43, an alarm generating unit 44, and an environmental radio wave updating unit 45.

The communication interface section 41 administers an interface with the network 5, and each of the receivers 1, 2, 3
Is connected to the network 5 via the LAN converters 6, 7 and 8.
TCP / IP (Transport Control)
Protocol / Internet Protocol) shall be implemented. The reception data capturing unit 42 is configured to receive the receivers 1, 2, 3
It has a function of taking in input data including electric field intensity data obtained via the. The eavesdropping radio wave monitoring unit 43 receives the electric field intensity data input via the reception data capturing unit 42,
It has a function of monitoring the presence or absence of unnecessary radio waves including eavesdropping radio waves by comparing with electric field intensity data in a state where there is no unnecessary radio wave including eavesdropping radio waves held in the environmental radio wave DB 9. Also,
The eavesdropping radio wave monitoring unit 43 also has a function of generating danger level data defined by a frequency including the electric field strength and notifying the alarm generation unit 44 when it is determined that there is a tapping radio wave.

The alarm generation unit 44 has a function of issuing an alarm depending on the result of monitoring by the wiretapping radio wave monitoring unit 43. This alarm is, for example, e-mail, voice output, or a web screen, or a combination thereof. Will be announced. In addition, the alarm generation unit 44 includes the wiretapping radio wave monitoring unit 4
In addition to displaying the received data that changes in real time, which is monitored in 3, depending on the user request, the risk level,
The estimated general transmission position etc. shall be displayed. The environmental radio wave updating unit 45 has a function of constantly updating electric field strength data in a steady state in which no unnecessary radio wave including an eavesdropping radio wave exists, using received data when an unnecessary radio wave including an eavesdropping radio wave does not exist, and is updated. The electric field strength data in the steady state is always held in the environmental radio wave DB 9 in the latest state. The frequency DB 10 is used for the risk level determination described later, and stores frequency data according to a previously defined risk level.

FIG. 3 is a flow chart quoted for explaining the operation of the wiretapping radio wave monitoring system of the present invention.
Specifically, it is a diagram showing a processing procedure of the wiretapping radio wave monitoring program of the present invention. 4 and 5 are diagrams quoted for explaining the operation of the embodiment of the present invention, and show examples of respective screen configurations on the electronic mail screen and the web screen. Hereinafter, the operation of the wiretapping radio wave monitoring system of the present invention shown in FIGS. 1 and 2 will be described in detail with reference to FIGS.

Before starting the eavesdropping radio wave monitoring program of the present invention, the person in charge of management activates the web screen shown in FIG. 5 as a pre-process, and sends a mail setting notification via a terminal device (not shown). Enter the data. here,
Notification frequency, danger level threshold at the time of notification (only those with a danger level higher than a certain level need to be notified), notification contents (frequency, electric field strength, time, danger level, mobile phone / PHS)
Each of the reception log and voice) should be set. It should be noted that the notification frequency and the risk level threshold value are numbers, and the notification contents are selected by marking a check box. In the web screen shown in FIG. 5, in addition to the above-mentioned setting screen, the monitoring waveform of the reception data received in real time via the reception data capturing unit 42 during operation, and the eavesdropping radio wave monitoring unit 43 make judgments. The dangerous level is displayed as an indicator.

After the above pretreatment, the host computer 4
From each of the receivers 1, 2, 3 to the LAN converters 6, 7,
The field intensity data measured by the reception data capturing unit 42 is captured via the network 8, the network 5, and the communication interface unit 41 (S301). Then, after noise removal by a noise canceller (not shown) (S302), the wiretapping radio wave monitoring unit 43 monitors the wiretapping radio waves (S303). That is, the eavesdropping radio wave monitoring unit 43 receives the input received data,
The electric field strength data stored in the environmental radio wave DB9 is compared. Here, if a change is detected, the wiretapping radio wave monitoring unit 43
Determines that there is an unwanted wave including an eavesdropping radio wave, and frequency DB1
The risk level is determined by referring to 0 (S304).
The electric field strength data held in the environmental radio wave DB9 is
It is assumed that the environmental electric wave updating unit 45 always updates the latest electric field strength data.

After the danger level is determined, the wiretapping radio wave monitoring section 43 further estimates the approximate transmission location (antenna position) (S305) and notifies the alarm generation section 44 of the result.
The alarm generation unit 44 generates an e-mail screen in the format shown in FIG. 5, for example, according to the mail notification setting previously set on the web screen, and notifies the person in charge of management (S30).
6). Here, it is notified by e-mail as “Danger level 1, transmission frequency *** MHz, radio wave strength *** dB μV near the antenna * on the * month * day of 2001”. Alternatively, it may be notified via the web screen shown in FIG. 4 via the reception data waveform for each receiver and the danger level indicator (S307). If the danger level is relatively high, it may be possible to output by voice.

As described above, the present invention realizes a security function against wireless radio waves by constantly monitoring eavesdropping radio waves using a network and issuing a warning when the eavesdropping radio waves are detected. Receiver 1,
The feature is that two or three are managed by one host computer 4. In addition, each of the receivers 1, 2, 3 and the host computer 4 is a LAN, LON, Open PLAN.
Wiring between the receivers 1, 2, 3 and the host computer 4 to connect via an existing network such as ET (a system that uses the electricity meter server as a gateway and monitors and controls each electric device via the Internet) Is very small. Still another feature of the eavesdropping radio wave monitoring system of the present invention is that the steady-state data (environmental radio wave DB9) in which no unnecessary radio wave is present is constantly updated by using the received data, so that the stable radio wave does not depend on the installation area. Can be monitored.

The communication interface unit 4 shown in FIG.
1, reception data acquisition unit 42, eavesdropping radio wave monitoring unit 43,
The procedure executed by each of the alarm generation unit 44 and the environmental radio wave updating unit 45 is recorded in a computer-readable recording medium, and the program recorded in this recording medium is read by the computer system and executed to thereby perform the eavesdropping described above. A radio monitoring system shall be realized. The computer system mentioned here includes an OS and hardware such as peripheral devices.

The "computer system" is a WW.
If the W system is used, the homepage providing environment (or display environment) is also included. The "computer-readable recording medium" means a flexible disk, a magneto-optical disk, a ROM, a CD-
A portable medium such as a ROM or a storage device such as a hard disk built in a computer system. Further, the "computer-readable recording medium" is a volatile memory (RAM) inside a computer system which is a system or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those that hold the program for a certain period of time are also included.

Further, the above program may be transmitted from a computer system having the program stored in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the program may be a program for realizing some of the functions described above. further,
It may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific structure is not limited to this embodiment, and a design etc. within a range not departing from the gist of the present invention are also possible. included.

[0024]

As described above, according to the present invention, since wiretapping radio waves are constantly monitored, it is possible to provide a wiretapping radio wave monitoring system with extremely high security against wiretapping using radio waves. Further, by automating the wiretapping radio wave monitoring work, it is possible to omit the work such as the wiretapping radio wave investigation by a specialist, and the cost effect is great. Furthermore, when it is desired to install the wiretapping radio wave monitoring system of the present invention in a plurality of rooms of a large-scale office, it can be installed relatively easily because the existing network is used.

[Brief description of drawings]

FIG. 1 is a diagram showing a connection configuration of a wiretapping radio wave monitoring system of the present invention.

FIG. 2 is a block diagram showing the internal configuration of the host computer shown in FIG. 1 by expanding its functions.

FIG. 3 is a flowchart cited to explain the operation of the wiretapping radio wave monitoring system of the present invention.

FIG. 4 is a diagram showing an example of an electronic mail screen configuration quoted for explaining the operation of the embodiment of the present invention.

FIG. 5 is a diagram showing an example of a web screen configuration quoted for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

1 (2, 3) ... receiver, 4 ... host computer, 5 ...
Network, 6 (7, 8) ... LAN converter, 9 ... Environmental radio wave DB, 10 ... Frequency DB, 41 ... Communication interface section, 42 ... Received data capturing section, 43 ... Eavesdropping radio wave monitoring section, 44 ... Alarm generating section, 45 ... Environmental radio update section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Kokubun             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation (72) Inventor Toshio Oyama             Shimizu Construction 1-3-2 Shibaura, Minato-ku, Tokyo             Within the corporation F term (reference) 5C087 AA10 BB20 BB74 DD05 EE14                       FF01 FF02 FF17 FF19 GG06                       GG19                 5K042 AA01 BA10 CA02 DA16 EA14                       EA15 FA11 FA15 GA01 HA02                       HA13 JA01

Claims (5)

[Claims] 1. A wiretapping radio wave monitoring system in which at least one radio wave receiver is connected via a network, wherein at least electric field strength data is fetched via the receiver and the wiretapping radio wave is not present. An eavesdropping radio wave monitoring system comprising: an eavesdropping radio wave monitoring means for monitoring the presence or absence of an eavesdropping radio wave by comparing with the electric field strength data; and an alarm generating means for issuing an alarm depending on the monitoring result of the eavesdropping radio wave monitoring means. . 2. The environmental radio wave updating means for updating the electric field strength data in the steady state in which the eavesdropping radio wave does not exist using the received data when the eavesdropping radio wave does not exist. Eavesdropping radio wave update system described in. 3. The eavesdropping radio wave monitoring means, when it is determined that the eavesdropping radio wave is present, generates a danger level defined by a frequency including the electric field strength and notifies the alarm generating means. The wiretapping radio wave generation system according to claim 1. 4. The alarm generating means displays the received data monitored by the wiretapping radio wave monitoring means, and displays at least one of the risk level and the estimated rough transmission position according to a user request. The wiretapping radio wave monitoring system according to claim 1 or 3, characterized in that. 5. A wiretapping radio wave monitoring program used in a wiretapping radio wave monitoring system in which at least one radio wave receiver is connected via a network, wherein at least electric field intensity data is fetched via the receiver and the wiretapping is performed. Causes the computer to execute an eavesdropping radio wave monitoring step for monitoring the presence or absence of eavesdropping radio waves by comparing with the electric field strength data in the absence of radio waves, and an alarm issuing step for issuing an alarm depending on the monitoring result by the eavesdropping radio wave monitoring means. Eavesdropping radio wave monitoring program.