Bank card can not set alarm password?
"If each bank card can set two passwords, one is the common password, and the other is the "alarm password." Once the card owner is forced to withdraw funds by the criminals, enter the 'alarm password' and the bank system can automatically alarm." A few days ago, Wang Jing.net’s “Creative Post” attracted attention. The “creative” was caused by a knife robbery in Wangjing recently. Industry experts said that the current technology can be achieved, but it has both advantages and disadvantages.

â–  Incident:
The Wishful Thoughts Caused by the Robbery Recently, a photo form post appeared on Wangjing. The post wrote: At 6 pm on August 18th, a knife robbery case occurred in the underground three-story garage of No. 201 Building in Wangxin Garden. When the poster stated that his wife was parking in the underground garage, he was hijacked by two knife-wielding criminals. After they took cash, they also took his wife to two ATMs to withdraw funds. Subsequently, the bandits tied his wife's hands and feet with tape and his wife broke free after 9 pm to call the police. At present, the police are trying to detect the case.
After the incident, many netizens were shocked. A netizen named “Guigua” is a whim, and she said that if the bank card can set two passwords, one is common and the other is an “alarm password.” "Once the card owner is duped into the ATM machine to take the money, the police can input the alarm code and can take out the money to guarantee the safety of the criminals. At the same time, the bank system recognizes that the card owner can automatically coordinate with the nearby 110 police officers through a password alarm. "Users Guigua" also guessed that "Alarm passwords are best to allow ATM machines to temporarily display lower card balances. For example, the card balance is 20,000 yuan, but ATM machines only display 5,000 yuan, allowing the gangster to think that the card There is so much money inside and the economic losses of the owners are reduced."
For this "creativity", many netizens expressed their appreciation. "The landlord's idea is very creative. If the technology is successful, then apply for a patent." However, some netizens poured cold water, saying that this is "the US drama to see more."

â– Experts:
After the promotion of the technology, the robbers also know that our bank card can really set two passwords? In response, yesterday, the reporter interviewed Mr. Guan, an expert on bank cards of Handgage Data Co., Ltd. He said, “At present, our bank cards are basically magnetic stripe cards, and the passwords are all set in the bank’s back-end system. It is possible to set two different passwords on one bank card."
For the automatic alarm proposed by netizens, Mr. Guan said that no matter what kind of alarm, it needs the support of the bank back-end system. “If the preset is good, the system can reach the alarm once it recognizes that the card has been input with the 'alarm password'. purpose."
However, Mr. Guan also said that if this method is implemented, besides bringing equipment and maintenance costs to the bank, because of the large number of passwords, it is necessary to keep in mind that there will be no confusion, and it will also cause some personal annoyances. In addition, once this preventive measure is promoted, the public will know that the robbery is naturally aware of it. “It may also bring about some negative effects. For example, once the robbers see that there is less or no balance in the card, it is easy for them to associate it. The owner of the card has been alerted. This may be more detrimental to the personal safety of the card owner."