Turing Forbidden Zone

After listening to Professor Mu's words, the freshmen all looked thoughtful.

Wang Gu was greatly shocked. In his life, no one had ever placed such high hopes on him, and he never thought that his step-by-step study career actually pointed out a more noble path for him.

Then they continued to visit key laboratories.

When I came to the confidential security laboratory next door, a postgraduate tutor came over ahead of time: "The freshman from the Jinhe Cup is here? Is the one named Shi Ye here?"

"Brother Ye is here." Wang Gu quickly replied, "He's... eh?"

After everyone looked back, they looked at each other.

Shi Ye quietly followed them up to the laboratory building, and disappeared without knowing it—and they were too focused on all kinds of novelty just now, so they didn't notice his presence.

Seeing this, the senior who led the team asked, "Teacher Cai, what's the matter with Shi Ye? If you're not in a hurry, I'll tell him when he comes back later?"

Mentioning this, Teacher Cai coughed in embarrassment, and said, "Isn't the third question of this year's Golden Lotus Cup the third typical question of HMM? It’s a bit difficult for freshmen. But after re-examination, it was found that there was a No.1 paper that was very interesting, with an accuracy rate of 76%, far exceeding our estimate..."

The senior said "ah" and said, "Is that the No.1 that was manually approved later? Our boss also said this."

"That's right, that's right." Teacher Cai couldn't stop nodding and said, "In principle, this classic Baum-Welch algorithm is limited to an accuracy rate of about 0.4, but if you look closely at his state transition matrix, it seems to be a variant I asked the children to study the algorithm principle behind it yesterday, but they are still confused today. No, I heard that Shiye, who is doing this question, is going to visit the laboratory today, so I thought about asking him to explain it to them. Got it."

The tutor and the seniors raised this issue and couldn't help chatting a few more words.

However, the freshmen in the back row were almost a little embarrassed.

Wang Gu raised his eyelids cautiously, and heard the seniors discuss in a low voice:

"Damn, what kind of freaks are newcomers? After finishing the third question, the accuracy rate is still 76%?"

"To tell you the truth, my accuracy rate is only 31%, which is less than half of others, puff..."

"Hey, I'm not only around 34."

"Is it really as scary as 76%? Is it a deviation caused by test case specialization?"

"It shouldn't be. I heard from the teacher that the state transition matrix has been changed, which means that the main chain has been updated, or that the entire algorithm principle has been optimized?"

"Tsk tsk, I'm dead, Qianlang died on the beach, it's so tragic!"

Wang Gu: "..."

Thinking of his poor "timeout", he couldn't help but shiver at the bosses.

After a few minutes, they quickly finished chatting about this topic.

The senior led everyone into the next laboratory and said, "The following are relatively confidential projects in our school. I can show you a few interesting projects, but don't tell them."

When the visitors heard this, their eyes lit up and they nodded repeatedly.

The next item to visit is behind another layer of security doors, and under the heavy protection is a black device that is not as big as the main computer box.

The senior said mysteriously: "This is the diffuse reflection laser information acquisition system... We call it the Di Ting Beast. Do you know Di Ting? The clairvoyance and wind ears in Shan Hai Jing can travel far and far, through the photodiode inside. , filter circuit, amplifier circuit and audio to collect and restore, and monitor all the sounds in a room; it can also restore the screen content of the light-emitting devices inside by collecting diffuse reflection of laser beams and receiving demodulation, including mobile phones, projectors, computers, can be listened to."

The students opened their mouths in shock, and someone subconsciously said, "What an awesome spy device!"

"Shh..." the senior said, "Don't talk nonsense about some words, how do you know if there is someone eavesdropping on our conversation in the house from a distance of 1000 meters?"

"Wow!" The freshmen covered their mouths again in fear.

"Hahaha, just kidding." The senior suddenly laughed, "This equipment in our country can only reach a distance of 50 meters at most. Do you know how far away the White Eagle Country next door is?"

"100 meters?"

"I guess 500 meters!"

"I also think it's at most 500 meters."

The senior raised two fingers and said, "2000 meters. In the declassified data of the White Eagle Kingdom eight years ago, they were able to wiretap 2000 meters away. Professor Mu attended the meeting that day, and he gave a report after he came back. Only then did our country know that there was such a device in the world, and then we established this project—professors have been working hard for eight years, and finally made a 50-meter achievement."

The students suddenly fell silent, and there was no sound in the room.

The senior smiled and said, "This has nothing to do with you, let's go and take you to the next project."

When the door of the next laboratory opened, everyone was stunned.

I saw Shi Ye, whom I hadn't seen for a long time, standing quietly in front of a group of cases, holding a mobile phone in one hand.

There is also a USB cable attached to his phone, and the other end is plugged into a port on the case, as if it is charging.

Because there was no seat next to the case, Shi Ye stood with his back against the window sill and stood against the light. From the arc of his eyelashes to the outline of his jaw, it seemed that there was a halo of light.

The senior who was walking in the front saw this scene, and couldn't help but sigh with emotion: "Damn, it really is a freshman school grass..."

Everyone's eyes suddenly focused on him.

The senior coughed in embarrassment: "Cough! What are you doing, the senior also knows how to visit campus forums!"

As he said that, he came back to his senses, walked up to Shi Ye, and said, "Well, classmate Shi Ye, you can't charge your mobile phone in a confidential laboratory, and you can't directly use USB cables to these interfaces, maybe There are confidential contents in it."

After Shi Ye heard the words, he looked at him for a moment and said, "Yes."

The senior felt a little uneasy for some reason, and then he relaxed, and said with a smile, "Do you want a power bank? I put it in my laboratory."

Shi Ye said: "No need." Then, he squatted down, pulled out the thread, and silently put it in his pocket.

The senior said again: "By the way, Teacher Cai was looking for you just now, you can go to room 412 when you have time."

Shi Ye didn't answer, the senior scratched his head, thinking that he had acquiesced, so he didn't say anything more.

Wang Gu on the side covered his face with one hand: "..." Brother Ye wouldn't go there at all, would he?Impossible, right? !

The main body of this laboratory is the computer room, and there is not much to see.

The senior said: "This should be a non-relational database project. I don't know much about it, but it should have been applied."

He said, sitting in front of an internal computer, connected to the internal database, and wanted to demonstrate it to the freshmen.

However, after two attempts, the connection to the database failed.

The senior scratched his head again, and said, "Oh, the school doesn't know what is being maintained recently, the database keeps failing to log in, and I can't turn over many papers..."

"The core database has been locked." Shi Ye said suddenly.

Everyone looked back at him in surprise, and the senior said in a daze, "No way, who has such a big ability to hack such a big database at D University?"

"It's not an invasion." Shi Ye said lightly, "It's blocking usability."

The senior laughed and said, "Well, even if it's true, it's okay. There are so many professors, there will always be a way, and it will be fine in a few days."

Shi Ye said: "If the source file of the database is infected, it will be encrypted with high strength using AES, and there is no way to decipher it, either theoretically or practically."

After hearing this, the senior couldn't help thinking for a while, and the relaxed expression on his face was gradually replaced by hesitation.

This is also the first time Wang Gu heard Shi Ye say such a long passage, even though he couldn't understand, he said in his heart: It seems very powerful.

After a while, the senior said again: "If it is really infected by a virus, it should be possible to decipher the virus sample in reverse, analyze its function realization, and then make a special killing, or simply find its generated KEY."

Shi Yedao: "You can use junk instructions or encrypted shells to hinder the progress of the analysis, obtain encrypted information from the external network, and add instructions to destroy data within a limited time."

The senior's expression gradually became serious, and he said, "Then what is the purpose of doing this, seriously destroying the contents of our school's core database?"

"Maybe." Shi Ye said, "It may also be blackmailed with the data in it."

Hearing this, the senior was finally stunned: "Fuck!" He was enlightened, mastered everything, and everything was explained!It seems that this is really possible!

Given the importance of these laboratories at University D, the academic value of the data in their core databases is difficult to estimate. Even a one-day shutdown may cause huge losses, not to mention that if they are damaged, they absolutely cannot afford such consequences.

If someone can really lock these data, it would be like Cao Cao, who coerced the emperor to make the princes, wouldn't he be able to blackmail him as much as he wanted?

Thinking of this, the senior was already very anxious, and couldn't help saying: "You guys wait here, I'll go to the boss to discuss this matter." Then he got up and opened the door and left, even ignoring the freshmen.

The visitors were a little stunned. They didn't expect this development.

Still, they were fairly easy after all.

"It should be fine, how can there be such a powerful hacker, a virus can blackmail the entire school?"

"I've never seen it before. Do you want to extort tens of thousands? Hundreds of thousands?"

"Locking files is better than 'Panda Burning Incense' back then."

"Hey, what shall we have for dinner tonight?"

……

Wang Gu didn't participate in their discussion, he secretly looked at Shi Ye, seeing the latter's still expressionless face, he looked down at his phone.

For some reason, a somewhat absurd idea came to Wang Gu's mind: the virus that Brother Ye pays so much attention to, maybe... it will be tricky?