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The monster's I was redeemed, Chapter 22, NFC school dormitory locks, like hotels, are all electronic locks.

A few days ago, when I went to the girls' dormitory to help Yi Wenna carry her luggage, Ai Liang deliberately observed the brand and model of the electronic locks used on the stair door and dormitory door.

Such as community gates, hotel rooms, dormitory door locks... These are all nfc electronic access cards.

As long as there is an nfc decoder and corresponding decoding software, it is quite easy to crack, and it is enough to be skilled.

Among them, the access control at the gate of the community is the most simple. Usually, it is an ID card with only a series of card numbers. You can directly touch a card from the residents of the community and copy and paste it.

The whole process is foolish, and if you can read, there is no possibility of missing.

The door card of the hotel is a little more complicated. The door card is simply encrypted. After leaving a certain range of the hotel, you need to go to the front desk to reactivate it.

But as long as you want, you can still open a room, then use the decoder to crack the data in the room card, and then import the generated dump file into the white card.

This will give you a duplicate room card.

Those who are capable can also hack into their database through the hotel's internal network and make themselves a universal card that can open all rooms.

However, this kind of universal card made by yourself cannot be used for a long time. After using it twice, someone will find that the program is abnormal, and then seal your card. Remember the URL m.xbequery. com

If there is any long-term demand, it is most convenient to directly steal the cleaning universal card.

Of course, this is referring to the general hotel.

Those special high-end hotels, this method is useless.

For example, in the east area of ​​Yichen Hotel, in addition to the room card, fingerprints and face recognition are also required. It is completely foolish to want to enter the room with just a room card.

Finally, there is the student card of Qianhua Experimental Middle School, or the meal card of other schools, which can save money and have strong security.

After all, when it comes to money, security cannot be tight.

However, the security level is also linked to the importance of the contractor company.

One is to discover data conflicts, and the latest data will prevail, resulting in the unusable copy card.

This is relatively advanced, the anti-theft system is perfect, and normal companies are willing to spend money on this.

The other is that the copy card is available, but the amount of the database will have a negative value. This is an old-fashioned system, which is very easy to intrude, and the cheapest system the company buys.

Take the simplest example.

You paid fifty dollars for a water card, and then copied the data inside to a white card.

After spending the 50 yuan card, take out the duplicated white card and continue to use it.

Because the data in the white card is still the data of fifty yuan.

If the invalid data of the white card is displayed, it is the former case. In this case, the general copying method is useless, and a more advanced decoder is required to crack the machine program.

But if the copied white card can continue to be used, it is the latter case.

Although you can copy the fifty-dollar water card indefinitely, the database of others is bookkeeping.

After the original 50 yuan is spent, the background data balance of this card will become zero. If you continue to use the copied white card, the data of -50, -100 will appear.

People will know that you have a problem by looking at the book, so don't try to make a lot of money by selling white cards.

When I meet the person in charge of the Buddhist system, the adults do not remember the villains, update the data, and encrypt it again, and the matter is over.

If you encounter a master who is unwilling to suffer, they will call the police and arrest them.

However, Ai Liang borrowed Yi Wenna's student card just to obtain the data file of the electronic lock of the dormitory, so there is no need to worry about this.

Why doesn't Ai Liang use her own student card...

Neither he nor Ye Qing were resident students, and the data permissions on dormitory door locks were not imported.

Therefore, the only way to copy the data of Yiwenna's student card is to compare it with his own student card. The extra part is about the permission of the dormitory door lock.

After confirming the data, Ai Liang will "connect" to the school's database to find similar files, and then import the found file data into the white card.

In this way, he can use a white card to swipe all the dormitory doors.

That Peng Yuan used this method to unlock the electronic locks on Yi Wenna's dormitory door and stair door.

As for the U-shaped lock on the door, for veterans, it can be opened with a wire with eyes closed.

For padlocks and U-shaped locks, practice more lock picking skills. There is basically no difference between locked and unlocked.

In the movie, there are many behaviors of opening handcuffs and breaking doors that are very cool.

In fact, if you buy a sample and practice more, you can also do it.

It is no exaggeration to say that, give the locksmith a pair of tooth cutters and a piece of iron, such as lock cylinders such as electric cars, motorcycles, and handle-type wooden doors.

People just glance at the keyhole, and they can cut a key for you on the spot.

It's all about practice.

Yi Wenna looked strangely at the computer in front of Ai Liang, the same thing as the charging pad.

"Are you going to copy my student card?"

Yi Wenna seemed a little hesitant: "But my student card can only open my dormitory, and I can't enter that guy's dormitory."

"I just need a reference."

Ai Liang retracted her arms and sat down in front of the computer again and said heavily: "Hurry up and get it."

What kind of fierce you are, take it!

Yi Wenna walked out of the living room with small steps, and came back with the student card between her index and middle fingers after a while.

She patted her student card on the table: "Here."

Looking at the programs running on the computer desktop, Ye Qing asked another question: "You can enter the dormitory, but how to check his computer? There should be no one who doesn't have a password on a laptop now, right?

And A Liang, you just said that the other party is very likely to have the technology to remotely control the computer, wouldn't it be exposed as soon as it is turned on? "

"Don't worry about this, it's not difficult to crack the computer password."

Ai Liang quietly looked at the deciphering progress bar of the student card data: "In addition, I have a solution for controlling the computer remotely.

When the student card is cracked, I will make a simple high-frequency radio interference device to block all electronic signals in a small area. As long as the signal of the power-on cannot be transmitted, he will naturally not notice that the computer is being used. "

"High-frequency radio jamming device? Do you have any materials?" Ye Qing asked, resting her chin in one hand. UU Reading www.uukanshu.com

"Wait a minute! The point is the raw material?"

Yi Wenna pointed at Ai Liang and shouted, "Compared to the raw materials, why isn't Ai Liang making that kind of thing the point!"

Ai Liang ignored Yi Wenna who was making a fuss: "Buy some signal jammers online, take out some parts and refit them."

"Can you two not discuss these topics seriously!"

Seeing Ai Liang ignoring her, Yi Wenna was a little mad, but her complaints were still sharp: "I bought a signal jammer, it's fine if you just don't use it, why do you need to modify it!"

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