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Guangdong Provincial Institute of Metrology Research and Development of Electronic Scale Cheating Detection Platform to Solve the Problems of Forensics
Dedicated metrological cheating "usual offender"
Guangdong Provincial Institute of Metrology Research and Development of Electronic Scale Cheating Detection Platform to Solve the Problems of Forensics
Newspaper (Reporter Shen Hong) The pattern of cheating scales in the bazaar market is constantly being renovated, which infringes the rights and interests of consumers and becomes a problem for the regulatory authorities to obtain evidence. A few days ago, Guangdong Provincial Institute of Metrology successfully developed the HopCatch electronic scale cheating detection platform (hereinafter referred to as "cheating detection platform"), which can decrypt the electronic scale cheating password within 15 minutes, and can restore the cheating process, solving the long-term existence of law enforcement departments. The difficulty of obtaining evidence provides a decisive basis for administrative punishment, and is hailed as the "nemesis" of cheating scales.
It is understood that because of the difficulty in obtaining evidence for cheating on merchant electronic scales, it is difficult to obtain administrative punishment for violations of consumer rights. This is the main reason why the lack of scales is repeatedly prohibited. At present, most of the cheating electronic scales on the market are implanted with a cheating software. Press a key on the scale, the normal scale will become a cheating scale. When a bad merchant learns that the law enforcement personnel is checking, it will instantly turn off the power and restart the cheating scale, so that the cheating scale will exit the cheating mode. Due to the complicated setting of the starting password for the electronic scale cheating mode, law enforcement personnel cannot reproduce the cheating behavior without grasping the password, and the technical problem of forensics needs to be solved urgently.
The Guangdong Metrology Institute has developed the HopCatch electronic scale cheating detection platform, which can simplify the "forensics". The platform can capture digital indicator scale display signals, automatically simulate keyboard and sensor input, and perform functional tests. When it is found that the input value of the simulated keyboard triggers the cheating backdoor, the group of keys will be automatically recorded, and the cheating scene will be restored after manual confirmation. This platform can also crack and reproduce the "customary cheating behavior" of electronic scales, weighbridges, and digital indicator scales, providing a strong technical guarantee for maintaining fair trade in the market.
Recently, Guangzhou Huangpu District Market Supervision Bureau seized a batch of electronic scales intended to be used for cheating, cracking "electronic scale password cheating" became a problem, and successfully detected the electronic scale by adopting the "cheating detection platform" of Guangdong Provincial Institute of Metrology Cheating password. Before entering the cheating password, a weight of 1000g placed on the weighing pan indicates that the weight is 1000g. However, when using the platform for function detection, the keyboard and sensor input "1 + tare + M1" is automatically simulated, and the displayed weight is 1050g; input "1 + tare + M4", the displayed weight is 1250g; when input "1 + Tare + M6 ", it displays 1600g (" 1 "instead of 1000g weight, tare, M1, M4, M6 are all electronic scale keys); under the three key combinations, the same weight is 1000g Code, but shows a different weight, up to 60% more than the actual weight. The Guangdong Provincial Institute of Metrology has cracked the forensics problem of electronic scales to achieve password fraud by replacing the chip by reproducing the cheating scene, and provided law enforcement evidence for the Huangpu District Market Supervision Administration.
The law enforcement department did not find any signs of alteration of the junction box of the scale sensor when it was suspected of cheating and forensics for a weighbridge of a renewable resource recycling company in Panyu District, Guangzhou City, but found that a suspect belt was added between the main line of the load cell and the load display. The connection cable of the RF module. Through the "cheat detection platform" test, it is found that the cable has the function of receiving wireless remote control, and the code can be changed by transmitting the code through the wireless transmission device, so that the weight displayed on the scale changes. The fraudulent behavior of cracking the wireless remote control code of the weighbridge provides a key technical basis for the detection of the case by the Panyu Branch of the Guangzhou Municipal Public Security Bureau.
At present, the "cheat detection platform" has won one computer software copyright registration certificate, one application for invention patents, and the third prize of the 2017 Guangdong Machinery Industry Science and Technology Award. It is reported that the platform will be extended to other people's livelihood measurement-related fields, such as water meters, electricity meters, fuel dispensers, and automobile testing lines, to promote measurement services for people's livelihood and maintain fair trade in the market.