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The security access control system of Manhattan Trust Bank is actually an electronic lock device controlled by a single-chip microcomputer. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

Different from the traditional mechanical lock, this access control system combines the latest electronic technology, using a special circuit to switch the door to the security door, but this control is artificially complicated, not simply powering on its control motor will start, but need to give its special circuit board specific signal, this signal is an encrypted "fingerprint" password, only the signal given and the original set of fingerprint password coincide, it will start smoothly.

This access control system uses a 16-bit counter rolling password grouping scheme, that is to say, its fingerprint password has a total of 2 to the 16th power, that is, 65536 in the encoding scheme, which can almost guarantee that the encoding of each transmission is different.

Assuming that the security door is opened ten times a day, it will take a total of eighteen years before it encounters duplicate coding.

Theoretically, cracking this fingerprint password will not work, but Lin Hong found that this kind of password has a vulnerability in security, as long as it is transmitted with the wrong password, the black box will send a set of codes in the form of infrared, and the time interval is only 15 milliseconds

In other words, if it is continuously triggered, it only takes 65536x15 milliseconds, that is, about 16 minutes to repeat the code, which makes it possible to crack the access control system.

The manual in Lin Hong's hand, in the eyes of others, may not be able to see anything, the dense circuit diagram is simply a decoration for others, only sometimes when there is a failure, will be checked partially.

However, such a circuit diagram is not a problem for Lin Hong at all, and after looking at it for a while, he fully understands the principle and can even simulate it in his mind.

He quickly devised a solution in his mind, and he started working on it.

"Uncle Stone, what are you doing here?"

Phyllis saw Uncle Stone begin to unpack the computer case, and then used a cable to connect one of the connectors to the calculator in his hand.

"I'm going to write a program to save all the codes sent by the black box, and then use the saved password dictionary to try to brute-force the access control system."

Originally, according to the original manufacturer's matching circuit, the signal transmitter and receiver will have an authentication process, only this certification is passed, and then the signal transmitter will generate an encoded key on the spot, and after the receiver in the black box is received, it will be matched with the internal rolling password, and if the match is passed, the security door will be opened.

However, Lin Hong didn't know which algorithm they were using for encryption and encoding, so he could only take the stupidest method, list all the passwords, and then match them all, which is brute force cracking.

"You're saying you have a way to open the security door?" Phyllis was overjoyed when she heard this, and she didn't care what brute force cracking was, as long as she could open it.

"Hehe, it should be fine!" Lin Hong said with a smile.

"Uncle Stone, you're amazing! I knew that nothing could stump you! ”

Phyllis was excited, hugged Lin Hong and kissed him fiercely on the face.

※※※※※※※※※

Outside the trust bank, Brian, an expert negotiator, and Edward, an FBI agent, are talking to the bandits in a communications van.

The robbers' request was impossible to fulfill, and they tried to communicate with the other party as much as possible, hoping that the other party would make some other request.

But the other party kept grasping this point, and hung up after a few words.

Edward carefully noticed that this time, the sound transmitted from the earpiece seemed a little strange.

"Brian, replay the recording of the conversation you just had." Edward thought for a moment and said.

"Okay."

Every conversation they have is automatically recorded by the device in the communication vehicle so that it can be used for later reference, or what clues can be found from it.

Of course, the other party's voice was obviously processed, hoarse and low, and a little indistinct. However, as soon as possible, after listening to it again, Edward still heard a clue from it.

"Brian, have you noticed that this time, his voice has changed somewhat."

"Yes, there seems to be an echo, and the other party seems to have moved to a small room." After he reminded him, Brian also noticed.

Edward then had the technician separate and amplify the audio track of the recorded background noise.

As a result, they heard a relatively clear background noise, the sound of water, and the grinding of something rolling on the ground.

Edward frowned and thought for a long time, then said:

"I continued to contact him, and I said that I had applied for a special order, and the above agreed to the other party's request."

However, this time, no matter how Brian dialed, the other party did not answer the phone again.

"They're definitely playing some tricks, and now it doesn't seem like we're stalling for time, it's them!" Edward walked back and forth, his thoughts beginning to become clearer, "What they are asking for is simply not possible. The other party is not stupid, on the contrary, the IQ is still very high, that is, he deliberately makes a request that cannot be completed. ”

When Brian heard this, he suddenly said:

"You're right! In the beginning, they asked for jets, but they didn't expect that we would agree to this request with Mr. Morgan's cooperation, so they offered to control the airport......"

"What the hell are they trying to do?"

Brian rubbed his bald head hard.

However, at this time, the exclamations of their colleagues were heard in their ears.

Henry, who was on duty outside, ran in and said, "The security door has been opened!" ”

Edward and Brian glanced at each other and immediately ran outside.

When Brian came outside, he saw that the heavy security door at the front entrance was slowly rising.

“attention！ (Attention everyone!) ）”

Brian was promoted to a loud command of the police to surround the entire bank, and they still don't know what the robbers are trying to do.

Since the robbery began, these security doors have not moved, and now they are finally open, which is very good news for them who are at a loss.

Powerful searchlights were struck at the doorway, illuminating the bank entrance as if it were daylight.

As the security door was raised, a crowd of people in blue work clothes began to rush out.

"Ready!" The leader of the emergency service team ESU shouted loudly at this time.

As he shouted, many ESU SWAT officers picked up their weapons and took aim!

Brian's pupils narrowed, and he saw an old man in the crowd, whom he had seen in the hostage's photo.

"Hold! Hold! Brian hurriedly shouted as he ran, "There are hostages inside!" ”

If he accidentally shoots the hostage as a robber, the leak will be bigger, and he, the policeman, probably won't do it anymore.

The people who rushed out of the bank were wearing the same costumes as the bandits, so they couldn't tell which were the bandits and which were the hostages, and they couldn't figure out which one the other was playing for a while. Why was the hostage suddenly released?

"Everyone lie down with their heads in their hands!"

"Don't move!"

……

The heavily armed police violently pushed the disobedient people to the ground, then pointed a gun to their head, and then the other police held them down, put their hands behind their backs, and handcuffed them.

"I'm not a robber, I'm a bank clerk!"

"What are you doing here, let me go!"

"Oh God! Do you think someone as old as me can be a robber? ”

"Damn it, get your guns away!"

……

Many people resisted violently, cursing, but to no avail, they were forcibly pushed to the ground by the police, and then handcuffed.

Lin Hong and the others didn't rush out in such a hurry, of course, with him, there was also Phyllis, and the "King of Hostages".

"Kid, why don't you rush out?" "The King of Hostages" asked him with a smile.

Just now, everyone was rushing to the outside, as if there were vicious robbers chasing after them with guns.

This is not to blame them, this closed bank, to everyone feels like a cage, leaving a huge psychological shadow in their hearts, it is estimated that they will not set foot in this bank for a long time after that.

In fact, just now, Lin Hong wanted everyone to walk out one by one, and it was best to communicate with the police before going out, but at this time, everyone didn't have the heart to listen to what he was saying, and they were scrambling to leave this terrifying place.

"It's easy for us to misunderstand when we rush out like this." Lin Hong didn't say much, this old man was very wise, and he might have walked more roads than he had crossed, so he could naturally understand his subtext.

"Not bad. Smart, calm and brave. The old man kept nodding his head and looking at Lin Hong, "Child, what's your name?" ”

“stone*lin”

“stone？ Nice name. I hope you don't waste your talent and talent, and if you have the opportunity, you should make your own career on the world stage and do something meaningful for this society. After all, we have experienced a catastrophe together, in the language of Eastern Buddhism, it is called 'fate', this is my business card, if you have the opportunity, please call me. ”

After the old man finished speaking, he walked out of the gate with old steps.

Lin Hong looked at the business card in his hand, the style was very simple, with only one name in the center of the white card.

"Walter Schloss?"

At this time, Phyllis leaned over to take a look, and when she saw the name, she couldn't help but exclaim.

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