ATM anti-theft card new technology application program

ATM anti-theft card new technology application program

Source: Yuantuo Technology Shi Xinhua

1. Implementation background

Due to the large number of ATM machine manufacturers and models, the shapes are different, it is difficult for ordinary card holders to distinguish the appearance of the normal slot and the abnormal slot, and often fall into the trap set by criminals, resulting in a large number of cases happening continuously. The installation of a bank card replicator in the card slot has become the most common form of crime on ATM machines. Although most of the ATMs are currently equipped with video surveillance systems, these single video surveillance systems can generally only be used for evidence collection after the incident, which is not obvious for timely warning and crime prevention. Faced with the complicated card environment for ATMs, the video surveillance system is severely constrained by the inherent defects of the video itself, and the inability to provide timely and effective early warning and prevention capabilities is also an important factor for frequent crimes on the ATM.

The most basic function of the security system is to detect and stop crimes in time, but facts have repeatedly proved that a single ATM video surveillance system has been unable to effectively curb the crazy bank card crimes on the ATM machine. The current form has urgently required the ATM security field to transform from the traditional passive defensive type to the active positive defensive direction.

Second, the program selection

A variety of technical methods can be used on self-service equipment such as ATM machines to detect the presence of foreign objects (such as side-recording devices, code robbers, etc.) around the card reader of the self-service equipment. The advantages and disadvantages of different methods are summarized as follows:

1. Light judgment: use the reflection principle of infrared light to open some light-transmitting holes around the card reader on the ATM machine, and emit infrared light from the inside of the self-service device through the light hole, when the criminal suspect is installed on the card reader For other devices, part of the light-transmitting holes will be blocked, and it can be determined that there is illegal installation of equipment.

The disadvantage of this method is that it is necessary to punch holes in the ATM machine and destroy the original structure of the ATM machine. In addition, if there are foreign objects (dust, etc.) blocking the light hole or the ambient light changes, false alarms will occur, and the false alarm rate is very high; if the card stolen device bypasses the light hole during installation, false alarms will occur. .

Therefore, this solution is not highly feasible in actual use.

2. Electromagnetic field judgment: use the magnetic field strength sensor or electromagnetic field strength sensing equipment to detect the change of electricity and magnetic field around the ATM machine card reader and compare it with the normal situation. If there is electricity or magnetic field abnormality, it is determined that there is a card theft.

This method belongs to the short-range detection technology, and it is also necessary to drill holes in the ATM machine to change the original structure of the ATM machine. If the ATM machine is a metal shell, the detection equipment must be external, which itself becomes a hidden safety hazard; in addition, in principle As long as there are objects that can change the strength of the magnetic field around, it will be falsely reported. If the detection sensitivity is lowered, it will be missed, and the sensitivity adjustment scale is difficult to grasp.

3. Analyze the image of the ATM machine card reader using image processing technology to find out the characteristics, compare it with the original card reader image, if there is any abnormality, it is determined that there is a stolen device.

This method is sensitive to the illumination of the environment, and has high requirements for image clarity. Once it cannot be met, it will bring a high false alarm rate; of course, its biggest disadvantage is that it has no anti-counterfeiting function. If the installed card thief appearance and color Similar to the original card reader, it cannot be distinguished from the video image, resulting in serious underreporting.

Since the current surveillance camera video has the inherent characteristics of a planar image, it is difficult to solve the identification problem of the camouflage side recording device using planar image analysis. The actual use effect is also very unsatisfactory.

3. The characteristics and advantages of the anti-side recording system based on the principle of laser ranging

For any bank card theft crimes that occur on the ATM, there is a common feature: the installation of a bank card replicator. Any addition means that the physical thickness of some important parts (insertion port, keyboard, etc.) on the teller machine has abnormally changed. Real-time normal insertion can be judged in real time by monitoring the spatial height of these sensitive parts through high-precision laser measurement sensors. Whether the bayonet is equipped with a side recording device, etc., so that it can issue alarms, early warnings, voice prompts, on-site pictures, etc. during the installation process, and win valuable time for timely stopping and arresting criminals.

Fourth, the realization principle:

First, multi-point ranging is performed on the card reader of ATM machine and other self-service equipment and its surroundings through a high-precision laser ranging system, and the measurement result is saved as a reference value.

During normal operation, the card reader of the self-service equipment such as ATM machine is repeatedly measured according to a certain period or preset conditions, and compared with the measured distance value received and the stored reference value, when the measured distance value does not exceed the alarm When the distance parameter value is maintained, the current state is maintained; when the measured distance value exceeds the alarm distance parameter value, it means that the physical state or shape around the reader has changed, then an alarm signal is sent to the control module, and the continuous alarm time is counted If the continuous alarm time statistics exceed the set warning time parameter threshold, the control module will send out warning instructions, warning warning signals, voice prompts and on-site pictures through the Internet of Things module, and will not act on normal card actions Will produce false positives;

Yuantuo anti-side recording system uses a phase-type laser ranging module to achieve high-precision laser multi-point ranging. A laser protective net can be formed around the card reader. Because the device is hoisted at a certain distance in front of the self-service device, it is not only convenient to set up, but also has good concealment. And without destroying self-service equipment, the installation position is flexible, and can be installed within a distance of 0.05 meters to 20 meters from the ATM machine reader; in addition, the laser light path of the device not only has a large detection range, but also is not easily affected by the environment and electromagnetic interference Solve the problems of false alarms and omissions of traditional equipment.

The Internet of Things module is specially set in the system, which can monitor the card slot status of the ATMs of each network point in real time through the central network, and can report to the center in time for any abnormal conditions of the card slot. At the same time, it can be connected to the SMS alarm module to send SMS alarm to the relevant personnel or the SMS alarm platform of the public security department.

In short, the anti-theft code system based on the new generation of early warning and prevention theory is an effective supplement and development of the traditional video surveillance system. Its appearance greatly avoids improving the bank's defense capabilities, changing the traditional single video surveillance idea, and making full use of various sensors to establish a complete system of frontier warning, on-site deterrence, equipment security, case control, and power delivery. It is of great significance to combat professional crimes of ATMs, protect the interests of cardholders, maintain the social image of banks, and guarantee the order of financial payments.