According to He Xingping's account, Gu Chen basically knew why the cash on Wang Guifang's bank card was suddenly stolen in a state of no operation.

It can be said that in this case, the sniffing equipment used by the suspect He Xingping is very cheap.

As for sniffing technology, it is not a high-tech technology, but why can it be used repeatedly?

Gu Chen naturally wanted to reflect.

He Xingping, who was caught, also took the initiative to confess: "You go to some APPs to register information with your real name, and many times it is convenient. ”

"But when you forget your password, you can log in through the SMS verification code, which is very convenient for you. ”

"At the same time, it is also convenient for us to steal your personal information, and it is convenient for you and me to log in through this verification code. ”

"Yes, convenient payments are a double-edged sword. Gu Chen also admitted this.

What He Xingping said is precisely where the loopholes of mobile payment lie.

Moreover, Officer Wang also randomly selected a number of commonly used APPs on his mobile phone for testing, which can generally be logged in by user name and password, and mobile phone number and dynamic verification code.

When a user forgets the password, they can retrieve the password by sending a verification code to the mobile phone number.

All this, for users, seems to be convenient and safe.

However, criminals, precisely using the mobile phone number, adding a dynamic verification code, can also log in to the convenience, choose in the dead of night, when people's anti-anti-awareness is relatively low, on their mobile phone or computer, enter the user's mobile phone number.

Then use the intercepted dynamic verification code to log in to the user's APP to achieve the purpose of stealing the user's funds.

But it is the way to add verification codes to mobile phones, which may be the most of them now, especially in cyberspace, which is commonly used by many APPs.

And it's not about one or two, it's about the way it is verified.

However, this verification method itself has certain security risks.

That is to say, first of all, the captcha is likely to be intercepted, and this is one of them.

And the second one is the reserved mobile phone number, this number, in fact, the possibility of its leakage now is also very large.

Therefore, these two methods are added together to make a unique verification method, which has certain loopholes.

Gu Chen knows very well that operators and banks should supplement them with other verification methods as much as possible.

Not only that, many Internet companies do not protect users' personal information very well.

And when you log in to many apps and use many mobile services, each mobile service requires individuals to provide some personal data.

So when people enter so many and use so many uses, almost all of everyone's information is backed up in various nodes of the Internet.

However, any of these backups are lost, leaked, etc., which will cause the loss of all personal data.

Because the suspect was able to deliberately interfere with the mobile phone signal, this would make the 4G, 5G mobile phone go to the 2G network.

The congenital shortcomings of the 2G network are difficult to make up for for a while.

This requires many Internet companies and banks not to use mobile phones and dynamic verification codes as the only authentication method.

It should be supplemented by other validation methods as much as possible.

At the same time, ordinary users should also strengthen their personal precautions.

Seeing that Gu Chen had been writing a draft in the notebook, Lu Weiwei couldn't help but stretch her neck.

While asking He Xingping, Gu Chen had already begun to draft a plan to prevent leakage.

Glancing at He Xingping, Gu Chen asked again: "Anyway, your sniffing technique should be quite difficult to deal with." ”

"If it's you, you're on your own point of view, is there any suitable way to put an end to it, I want to hear your opinion. ”

Gu Chen really needed to listen to He Xingping's opinion too much.

From different perspectives, the party who commits the crime often has a more macro view than the victim.

He Xingping nodded and said: "If the best way is to say that if you want to bind a bank card of a third-party platform, try not to put too much money in it." ”

"In other words, poverty can prevent theft?" said Officer Wang with a sudden feeling.

I feel that after so many years, I suddenly had an epiphany, it seems that poverty is not bad, at least I am not afraid of thieves and remember that it is true.

He Xingping was also stunned, and then nodded and said, "Poor...... That's pretty much what it means. ”

After Gu Chen understood the situation at the scene clearly, he took out the handcuffs and directly handcoled He Xingping: "Please come back with us to the Furong Branch for investigation." ”

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......

After bringing He Xingping back to the Furong Branch, he also brought back the equipment debugged in He Xingping's rental house.

Gu Chen handed these to He Junchao and asked He Junchao to sort out the data.

At the same time, Wang Guifang, who had been waiting for a long time in the office of the third group of the Furong Branch, also got the lost 50,000 yuan in cash as she wished, and her whole jaw was about to fall there.

She grabbed Gu Chen's hand and said, "Officer Gu, thank you so much, I didn't expect that my stolen cash would be recovered so soon, and your efficiency has also increased, right?"

"It's okay, it's good that the cash can be recovered......"

Before Gu Chen's words fell, Wang Guifang immediately interjected and interrupted: "I've heard that in my case, it does take a long time to recover, like a girlfriend of mine, who lost tens of thousands of yuan by telecom fraud last year, and has not recovered it yet." ”

"Actually, I really don't care about the 50,000 yuan, I just think that there is so much cash in the card, if all of it is stolen one day, then I will be really in trouble. ”

"I know. Gu Chen also stretched out his hand to interrupt Wang Guifang's words, and continued to admonish: "But I want to remind you here that your name, mobile phone number, dynamic SMS verification code, as well as ID card information and bank card account number, have all been mastered, and it is recommended that you change this information immediately to avoid encountering the same situation again." ”

"You...... What do you say? My name? And these mobile phone numbers, bank cards, and so on, how can these things be known by other people?"

Gu Chen couldn't explain in detail to her for a while, so he reorganized the language and said: "Let me tell you so simply, your mobile phone signal was interfered with by someone, and it directly became a 2G signal." ”

"The suspect is using the 2G signal vulnerability to capture your mobile phone number and dynamic verification code, so as to use these to log in to all the social apps you have registered, and use these login accounts to scrape together to capture your other information. ”

This includes your ID number, name, and bank card information. ”

"Through this data, the suspect can accurately grasp your income, so that if you don't strengthen your prevention now, I'm afraid that theft will happen again." ”

"Really...... Is it really that scary?"

Also listening to Gu Chen's explanation, Wang Guifang suddenly panicked.

You must know that she is a rich woman at best, and now her identity information is completely in the hands of criminals.

In this way, he has become an ATM for criminals.

Thinking of this, Wang Guifang was about to cry: "Officer Gu, what ...... So what should I do? What should I do?"

"Don't worry. Gu Chen had already expected Wang Guifang's reaction, so he suggested: "If you say that you want to bind a bank card of a third-party platform, try not to put too much money in it." ”

"Because the criminal traffickers take advantage of the loophole of secret payment, that is, the SMS verification code can be paid, to swipe your money away. ”

"So, on the bound third-party platform bank card, you try not to put too much money in it. ”

"Okay, I'll listen to you. Wang Guifang suddenly nodded like a chicken pecking rice, panicked, and asked: "In addition to this, what else needs to be paid attention to?"

After Gu Chen thought about it, he said, "If you suddenly receive an unknown verification code, and then find that your bank card has been stolen, don't panic. ”

"The first thing you think of is to go to the public security organ to report to the police as soon as possible, and stop the payment in time, and report the loss of your bank card to freeze. ”

"The next thing is to hand it over to our public security organs to help you recover this money, do you understand?"

"Ming...... Understood, I understood. Of course Wang Guifang understands, if she doesn't understand that she may have to change from a rich woman to a negative woman, of course she has to understand.

Zhang Peijun, the vice president of the bank on the side, was also shocked and said: "I didn't expect it, I really didn't expect it, now the modus operandi of these criminals is really getting more and more superb, and it is impossible to prevent it." ”

Glancing at Wang Guifang, Zhang Peijun said again: "Sister Wang, I have already said it, this matter must have nothing to do with our bank, there must be something wrong, you see, you threw the responsibility to our bank at the beginning, and let so many customers see it, it is really difficult for us to do it." ”

Wang Guifang was also smiling at the moment, and hurriedly compensated Zhang Peijun: "Brother Zhang, it was your sister Wang who was reckless and brought such a negative impact to your bank." ”

"But I was in a hurry, after all, the bank card was stolen for no reason and swiped 50,000 yuan, if it was really your bank that did it, then I have to be careful. ”

"After all, over the years, have your bank leaders secretly diverted customers' funds to speculate in stocks and buy funds?"

was asked by Wang Guifang, Zhang Peijun was speechless.

Indeed, what Wang Guifang said is also the truth, in recent years, various bank leaders have embezzled customers' book funds to do private work have occurred repeatedly, and they have also become a hot topic in society for a while.

Wang Guifang used this trick to speak, Zhang Peijun really had nothing to say, so he could only nod happily and said: "Sister Wang, what you said is right, but it is a minority after all." ”

"It is impossible for a rat poop to spoil a pot of porridge, right? Our bank will never have this situation, we are completely abiding by professional ethics, with my Zhang Peijun in the bank, you can deposit money and borrow money. ”

"Okay, I believe in your brother. Wang Guifang didn't seem so angry anymore.

Before, the two of them were still shouting in the bank hall about who was right and who was wrong, but now Gu Chen recovered Wang Guifang's stolen funds, and Wang Guifang was naturally happy.

Gu Chen told her the remedy, the first problem that Wang Guifang has to solve now is to set the bound third-party payment bank card to a small amount, which is naturally indispensable for Zhang Peijun to operate.

So after Wang Guifang thanked Gu Chen and all three groups of police officers, he left the Furong Branch with Zhang Peijun.

Seeing this, He Junchao couldn't help but ask Gu Chen: "By the way, Team Leader Gu, what should you do with He Xingping that you arrested?

"Leave that alone. Gu Chen stopped directly: "Although this case is not big, the problems reflected are worthy of everyone's attention." ”

"And pull out the radish and bring it out of the pit, this industrial chain is not so simple, this He Xingping is just a small role, and we must rely on him to dig out the entire industrial chain. ”

Officer Ding frowned and asked Gu Chen, "Then what do you say?"

"I'm preparing a material, I want to sort out the information on this kind of problem directly, and send it to Zhao Ju's work mailbox, I think Zhao Ju should be interested in this. ”

"That's the best. Officer Ding also agreed with Gu Chen's statement very much, so he said: "Then it's hard to work for Team Leader Gu, hurry up, and tell our brothers if you need help." ”

"Not now, it's going to be soon. Gu Chen sat down at his desk and began to prepare the reporting materials.

And the subsequent actions will definitely be indispensable to the third criminal investigation team, and the third criminal investigation team will be the absolute main force in handling the case.

At the same time, it also requires the full cooperation of other departments of the Seremban Branch.

Gu Chen, who knew this well, therefore needed a complete report to be handed over to Zhao Guozhi, so as to get a little command from Zhao Guozhi, so that he could mobilize other departments to assist in handling the case.

In the office, everyone took Gu Chen's investigation transcript and browsed it repeatedly, and suddenly felt that the sniffing technique was a little scary.

After Officer Ding flipped through it, he was shocked and said, "With just a few cheap mobile phones and a worn-out laptop, you can do whatever you want?"

"That's right. Yuan Shasha also thought about it and said in horror: "In that case, our personal information is like water in a pool, and every time an Internet service is used, it is like a pipe installed in the pool, which increases the risk of leakage." ”

"But the concern is that many pipes use the same faucet, that is, a mobile phone number and a dynamic verification code. Lu Weiwei added, so that everyone could hear it more clearly.

Officer Wang cupped his cheeks and thoughtfully: "The current environment is much better than ours back then, but there are more and more information network crimes. ”

"And the reason why these criminals have succeeded is to take advantage of various loopholes in network technology. ”

He Junchao pouted and said: "I hope that these telecom operators, Internet companies, banks, and regulatory authorities can think of more ways to effectively protect the property safety of the people." ”

"After all, there's no point in not having a safe convenience. ”

"Isn't this something banks and network operators should consider strengthening?" said another trainee officer.

Soon, the scene became extremely noisy.

A group of police officers with thousands of dollars in wages began to worry about the safety of the property of these multi-billionaires.

Lu Weiwei raised her hand and said: "There are also major APPs, since it is so natural to ask for permissions, then don't think about being a turtle with a shrunken head when it is leaked." ”

"Agreed. Yuan Shasha also raised her hand in agreement: "Sometimes, they will really make you feel the sense of despair that they shirk their responsibilities." ”

"That should be up to the operator to pay. He Junchao slapped the table, and said indignantly: "Whoever makes their base station so secret, not only has to compensate, but also has to pay a huge fine, saving these people from pushing various network packages all day long, just don't do personnel." ”

"Hehe, it's terrible, ordinary people can't defend against this kind of ah, inexplicably the text message came, the money was swept away, how to prevent it? A female probationary police officer also couldn't help but say.

Soon, the discussion also entered the white heat.

Many other police officers passing by the three groups of offices would stop for a moment when they passed by, thinking that the three groups of offices were holding a debate competition.

Of course, Gu Chen was also very aware of the seriousness of this kind of thing.

Because sniffing technology, objectively, is really the kind that everyone says is unguardable.

And from the investigation of He Xingping, it can be seen that he is just a small character.

It can be seen that in the entire Jiangnan City, it seems that this criminal gang has appeared.

It is obviously a vicious battle to find this criminal gang and wipe out the core.

After analyzing the pros and cons in the report, Gu Chen rechecked it again, and then sent it to Zhao Guozhi by email.

And Zhao Guozhi also has a tradition that has been preserved, that is, before getting off work, he must read his work mailbox before going home.

The work report sent by all the police officers of the Seremban substation should be completed on the same day.

Something that needs to be solved urgently, Zhao Guozhi will immediately understand the situation.

As for the problems that are not thorny, Zhao Guozhi will solve them the next morning.

This is a bridge of communication between Zhao Guozhi and many police officers of the Seremban Branch, and it has always been welcomed by everyone.

After Gu Chen finished sending back his analysis report, he stretched his waist and moved his whole body.

Seeing that everyone was still discussing, Gu Chen picked up the water cup and walked directly to the water dispenser to pour hot water.

Officer Ding also complained to Gu Chen: "I said Gu Chen, now the personal ** leak is really serious." ”

"For example, every time I receive a variety of sales calls, I am very frightened, I want to ask where it was leaked**, and I don't know who to scold, it is estimated that the bank has leaked out, especially the secret payment, although it is convenient, but it is full of loopholes. ”

"Senior Brother Ding. Seeing that Officer Ding complained about the bank seemed to be very energetic, Gu Chen also said with a mocking tone:

"Objectively speaking, I remember that in the past, bank transfers had to use online banking shields, and it was not enough to have a verification code, which people did really well. ”

"But later, after mobile payment became popular, you can transfer money without using an online banking shield, and you can have a verification code, which is more convenient and faster. ”

"I guess the bank should have been forced by competitive pressure later, so now some mobile phone verification codes are bound to it, so this really can't be blamed on the bank. ”

"That's right, I think Senior Brother Gu is very objective. Yuan Shasha also very much agreed with Gu Chen's opinion, and continued:

"After all, society is advancing, banks are strengthening secrecy, and scammers are also studying cracking, this is the relationship between spear and shield, and mutual pressure can make progress. ”

"It's useless. He Junchao has always been a pessimist, and he has been unhappy with the operator for many years, so he complained directly:

"Now those operators don't talk about protection, some of them will sell your data, and all kinds of sales calls are sold by those people. ”

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