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Due to the large number of ATM machine manufacturers and models with different shapes, it is difficult for ordinary cardholders to distinguish the difference between the appearance of the normal card slot and the abnormal card slot. It often falls into the trap set by criminals, resulting in a large number of cases. Adding a skimming device to the card slot has become the most common form of crime that occurs on ATMs. Although video surveillance systems are currently installed on most teller machines, these single video surveillance systems can generally only be used for evidence collection after the incident, and are not effective for timely warning and deterring crimes. Faced with the complex card-using environment of the teller machine, the video surveillance system is restricted by the inherent defects of the video itself and cannot provide timely and effective early warning and prevention capabilities. This is also an important factor in the frequent occurrence of crimes on the teller machine.
The most basic function of the security system is to detect and prevent crimes in time, but facts have repeatedly proved that a single ATM video surveillance system can no longer effectively curb the crazy bank card crimes on ATM machines. The current situation has urgently required the ATM security field to transform from the traditional passive defensive type to the active active defensive direction.
plan selection
ATM machines and other self-service equipment can use a variety of technical means to detect whether there are foreign objects around the self-service equipment card reader (such as skimming devices, code pirates, etc.). The advantages and disadvantages of different methods are as follows:
1. Light Judgment: Using the principle of infrared light reflection, some light-transmitting holes are opened around the card reader on the ATM, and infrared light is emitted from the self-service equipment through the light-emitting holes. When the suspect is installed on the card reader For other devices, part of the light-transmitting hole is generally blocked, and it can be determined that there is illegal installation of equipment at this time.
The disadvantage of this method is that holes must be punched on the ATM machine, which destroys the original structure of the ATM machine. In addition, if a foreign object (dust, etc.) blocks the light hole or changes in ambient light, false alarms will occur, and the false alarm rate is high; if the stolen card skimming device bypasses the light hole during installation, false alarms will occur. .
Therefore, this scheme is not feasible in actual use.
2. Electromagnetic field judgment: Use magnetic field intensity sensors or electromagnetic field intensity sensing equipment to detect changes in the electric and magnetic fields around the ATM card reader and compare them with normal conditions. If there is an abnormal electric or magnetic field, it is determined that there is a card thief.
This method belongs to the short-range detection technology, and it is necessary to make installation holes in the ATM machine to change the original structure of the ATM machine. If the ATM machine is a metal casing, the detection equipment must be external, which itself becomes a safety hazard; in principle, As long as there are objects around that can change the magnetic field strength, it will be falsely reported. If the detection sensitivity is lowered, it will be falsely reported, and the sensitivity adjustment scale is difficult to grasp.
3. Use image processing technology to analyze the image of the ATM card reader to find out the characteristics, compare it with the original card reader image, and determine the presence of a pirate if there is an abnormality.
This method is sensitive to the ambient light and has high requirements for image clarity. If it cannot be satisfied, it will bring a high false alarm rate; of course, its biggest disadvantage is that it has no anti-counterfeiting function. 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 the plane image, it is difficult to solve the identification problem of the camouflage skimming device by using the plane image analysis. The actual use effect is also very unsatisfactory.
Analysis of the characteristics and advantages of the anti-skimming system based on the principle of laser ranging
For any bank card theft crime that occurs on the teller machine, it has a common feature: the installation of a skimming device (theft device, a fake keyboard, etc.). Any additional installation means that the physical thickness of some important parts (card slot, keyboard, etc.) on the teller machine has changed abnormally. The high-precision laser measuring sensor can monitor the changes in the space height of these sensitive parts in real time to judge the normal insertion in real time. Whether the bayonet is equipped with a skimming device, etc., so that it can send out alarms, warnings, voice prompts, and on-site photos during the installation process, so as to win precious time for timely deterring and arresting criminals.
Implementation principle:
First, a high-precision laser distance measurement system is used to perform multi-point distance measurement on the card reader and its surroundings of self-service equipment such as ATM machines, and save the measurement results as a reference value. During normal operation, the card readers of ATM machines and other self-service devices are repeatedly measured according to a certain period or preset conditions, and the received measured distance value is compared with the saved reference value. When the measured distance value does not exceed the alarm When the distance parameter value, the current state is maintained; when the measured distance value exceeds the alarm distance parameter value, indicating that the physical state or form around the reader has changed, 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 alarm time parameter threshold, the control module sends out early warning instructions, early warning signals, voice prompts, and on-site photos via the IoT module. At the same time, it does not respond to normal card insertion and other actions. Will produce false positives.
Yuantuo anti-side recording system uses a phase laser ranging module to achieve high-precision laser multi-point ranging, which can form a laser protective net around the card reader. Since the equipment is hoisted at a certain distance in front of the self-service equipment, it is not only convenient to set up, but also concealed. And there is no need to destroy the self-service equipment, the installation position is flexible, and it can be installed within a distance of 0.05 meters to 20 meters from the ATM machine card reader; in addition, the laser light path of the device not only has a large detection range, but also is not susceptible to environmental influences and electromagnetic interference, which is effective Solve the problem of false positives and false negatives of traditional equipment.
The system is specially set up with the Internet of Things module, which can monitor the card port status of ATMs at various outlets in real time through the central network, and can actively report to the center in time for various card port abnormalities that occur. At the same time, it can be connected with the SMS alarm module to send SMS alarms to related personnel or the SMS alarm platform of the public security department.
In short, the anti-code hacking system based on a new generation of early warning and prevention theory is an effective supplement and development to the traditional video surveillance system. Its appearance has greatly avoided improving the bank’s defense capabilities, changing the traditional single video surveillance thinking, and making full use of various sensors to establish a complete system of frontier early warning, on-site deterrence, equipment security, case control, and force projection. It is of great significance to combat ATM professional crimes, protect the interests of cardholders, maintain the bank’s social image, and ensure the order of financial payments.
technical parameter
Model YT-ATM-BANKCARDDS
Measuring accuracy 2mm
Alarm input 1 way
Alarm output 1 way
Network interface 1 RJ45
Communication interface 1 RS-232
Power DC 12V
Power consumption≤1W
Working temperature -10℃–＋55℃
Working humidity 10%～90%
Chassis size (mm) 200 wide × 300 deep × 200 high
Weight 520g
Nanjing Yuantuo Technology Co., Ltd. http://www.ytkj.cpooo.com
Contact: Mr. Shi
Phone: 18951773276
QQ:1309013286
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