Turing Forbidden Zone

At that time, the students didn't pay attention to the fact that if the virus is easy to solve, how can the D University allow the core database to be unconnectable for so long since the beginning of the semester?

After the visit in the afternoon, Wang Gu returned to the dormitory thoughtfully and thoughtfully, looked at Yan Kairui and said, "Brother Carry, our school server seems to be infected with a virus."

Yan Kairui wore earphones and was busy playing games. Hearing this, he didn't turn his head back and said, "Damn, there are so many great people in D, what could be the matter?"

Wang Gu said again: "The senior also said that there is something wrong."

Yan Kairui: "Oh, it's okay."

Wang Gu: "Brother Ye also said something was wrong, he said at least thirty words in one sentence."

Yan Kairui: "What the hell is this virus so scary?!"

Wang Gu: "..."

Speaking of which, Shi Ye did not disband and return to the dormitory like them on the spot, but disappeared again.

Wang Gu sat down, and chatted with Yan Kairui about this problem with confidence: "Although I don't understand, Brother Ye told the senior that there is no way to solve it. This virus may lock the database and then blackmail the school for a large amount of money." money."

Yan Kairui stopped playing games, turned around and said, "Hey, I saw this on FB, isn't this the ransomware virus called 'Badguy'?"

Wang Gu: "Huh?"

Yan Kairui said: "I just saw it this morning! The media didn't report it, but it was exposed by the employees themselves. The database of Raian's family was locked and blackmailed, and they had to pay 200 million US dollars to unlock it!"

Wang Gu was confused, Yan Kairui gestured with his hands and said, "Raian is a very powerful game company, making a lot of money every day. But this virus among them is very shameless, and I don't steal their data, but But don't let them use it for themselves - just like a thief who doesn't take your bicycle, but puts ten locks on your bicycle, and asks you to pay him 200 yuan before he will give you the key, otherwise you won't be able to use it Your own bike!"

Wang Gu suddenly realized, and finally understood the principle of the ransomware virus.

Wang Gu thought for a while, then asked Yan Kairui: "Then D is so powerful, he should be able to crack the password easily? I see that they hacked account numbers, and it is said that they can crack it pretty quickly."

"It's not the same thing." Yan Kairui scratched the back of his head and said, "Maybe we will take a cryptography course in our sophomore year. Anyway, user passwords should be able to be cracked by brute force, because the total is only so long, no matter how long It’s only a few dozen characters at most? But the locked data is not acceptable, tens of thousands of gigabytes, if some uncrackable algorithm is used, it’s basically impossible for a god to save it.”

"God," Wang Gu said, "are some decryption algorithms unbreakable?"

Yan Kairui said: "I don't know the specific algorithm, but the current encryption algorithm is already very strong, and there is a solution in theory, but in practice it is difficult to reach the sky, so it is used for encryption."

Wang Gu racked his brains to recall Shi Ye's words, and said, "Is there an algorithm called 'AES'? Why is it only theoretically solved?"

"That's right! I also have an impression of this name!" Yan Kairui immediately said, "If there is no key for this modern algorithm, there are three possibilities to crack it: First, the supercomputer 'Tianhe' will count hundreds of years before we can talk about it." ;Secondly, when the quantum computer is born, it can be used for calculation; Thirdly, the old man Marx appeared..."

Wang Gu: "... After talking about it for a long time, it is still basically impossible."

Yan Kairui spread his hands: "Otherwise, how could it be difficult for Brother Ye?"

Wang Gu: "..." As expected of you, Brother Ye's number one fan.

While the students are still ignorant of this matter, in fact, the computer industry in Huaguo has already experienced continuous earthquakes because of this virus.

The electronic worm "Badguy", commonly known as "bad guy", spread to the Internet at some time and infected many important servers, including large enterprises, schools, hospitals and even government departments.

This virus has been lurking quietly on the Internet for a long time, until September 9st, the important school start time, suddenly broke out on time!

The infected computer will restart immediately, and then enter a blue screen interface, which displays the same paragraph in multiple languages:

[(Title) Oh, your file is encrypted!

支付在9月1日18:00:00被发起，你剩余06:23:59:28（计时器）的时间来完成支付，否则你的文件将被永久丢失！

[A bitcoin payment link]

Q: What happened to my computer?

A: Your important files are encrypted, including documents, photos, videos, databases and other documents are inaccessible.Maybe you will try to find a way to decrypt it, but I advise you not to waste your time.No one can unlock it for you without our decryption service.

Q: Can I recover my files?

A: Of course you can.We guarantee that all your files will be fully and efficiently restored as soon as you complete the payment.However, you don't have that much time to think about it, we only give you a maximum of 5 days before all files will be permanently deleted.You can decrypt a few files for free first, to try our decryption service, click [link]...]

There's more QA stuff below, and even a tutorial on how to make bitcoin payments for dummies.

It is basically guaranteed that anyone who sees this interface can quickly realize what happened to their computer and understand the entire electronic kidnapping and extortion case.

As of September 9th, according to the statistics of the higher authorities of the country, a total of 15 IPs have been infected in the entire Huaguo, 1.1% of which are public (servers), and there are nearly 90 potential private infections that have not yet broken out, and As many as 8 million suspected victims.

In other words, the virus was maliciously developed and circulated specifically to extort a large amount of money; and it is selective, it will charge a higher price for large service data, such as a database, and will give more Consider time.

As of September 9, 15 victims in Huaguo alone could not bear the pressure and paid the fines. There are different opinions on the total amount, but it is generally believed that the total amount is around 195 US dollars.

D University is one of the victims, but they have not paid the ransom for a long time.

On the one hand, because D University is a well-known institution, there is no fatal business pressure to unlock the database; on the other hand, D University is famous for its computer science, and the infection of the core database will be a huge scandal!

Not only did the school immediately decide to block the news, but even the higher-ups told the media not to spread the word, and at the same time ordered the media not to create panic on the Internet, so the problem was not immediately exposed to the public.

After all, ransomware mainly targets large institutions, and it is really difficult for ordinary people to access this information.

At this time, University D was in a state of desperation, and their core figures in computer security, such as Professor Mu Jiangtian, had been recruited by the above two days ago to join an emergency technical team, which was assigned to the Operation Department of the Security Bureau SA.

After several days and nights of sleepless nights, the most critical data was finally rescued from the fate of being destroyed after time ran out, but no matter what, the difficulty of unlocking was still unavoidable.

The more top-level experts, the more they can confirm and confirm this theoretical problem: our modern encryption algorithm is too strong, so strong that even the power of the state cannot violently unlock the file!

After all, this is an era of technological explosion that "reduces ten forces in one moment".

No matter how you look at it, I'm afraid I can only bow to the virus author and hand over the ransom that is as expensive as that day.

At this time, the emergency technical team had been working continuously for three days and two nights.

Encryption experts have largely abandoned the impossible path of unlocking themselves and turned to tracking down the virus author.

They checked all the ransom payment links, but regrettably found that this led to the world's largest underground bitcoin trading market, and the entire process was communicated through the Onion network. It was basically impossible to trace the IP of the perpetrator in a short time.

Rescue efforts have so far been clueless.

The well-known experts in Huaguo pondered in front of the whiteboard and sat in a circle for discussion. However, they sat withered from dark to dawn, and still could not find any theoretically feasible method.

Someone persuaded: "Academician Mu, you are getting old, why don't you take a rest first..."

Mu Jiangtian shook his head persistently, and said, "I'm very strong, and my experience of staying up late is several times that of your young people! Let's see for a while."

On the other side, a staff member came over and said, "Hi, professors, the news may not be blocked anymore. The General Staff decided to issue a notice to the public, hoping that those who know the information can provide information about the author of the virus, or try to solve the file lock problem..."

Mu Jiangtian asked, "Where do you send it first?"

"It's mainly professional forums such as Flower Field, Red Hat Forum, and Sixth Universe."

Discussions erupted among the experts. These names are all small non-governmental hacker organizations that have been reported to the above. They mainly focus on Internet security research, and they can be regarded as the backbone of non-governmental experts.

Among them, the Huatian Forum has the largest number of registered people, the loudest voice among the people, and the most master hackers hidden in it.

Following the announcement above, the Huatian Forum is required to post the content on the internal forum.

One of the administrators of the forum, "xyzabc123", was almost frightened into a heart attack. He stroked his chest and browsed through today's events.

Then, he carefully dragged out the private message from the forum.

[xyzabc123: God S, are you there? 】

[xyzabc123: The Badguy virus is really getting bigger, your prediction is super accurate.Now the higher-ups intend to solicit opinions from the people, can you reply me if you have time? 】

……

The other party to the private message never responded.

xyzabc123's face collapsed, and he flipped through their chat records, almost all of them were his own hot face pasting the other party's cold ass.

He took out a cigarette between his fingers, took a deep breath, and thought to himself in frustration: Maybe the boss is still at work?This level of technical master is afraid that the annual salary is one million dollars, and he is very busy, so he has no time to reply to his message.

He continued to flip through the chat records for several minutes, until he reached the top, and he made statistics——

He took the initiative to find God S: 31 times, 0 times were answered in seconds, and 9 times were answered later.

God S took the initiative to find him: 0 times.

The contrast is stark.

Licking the dog almost shed tears of disappointment.

xyzabc123 typed a lot of words in the dialog box, but finally deleted them one by one, and sent a very vivid emoticon package instead:

["Easy, light, boss, I'll leave the cracking to you" pouted buttocks.jpg]

The next moment, xyzabc123's eyes suddenly widened!

He never expected that there would be a fantastic response in the dialog box!

[Signale: Busy. 】