C Language Cultivation

At four o'clock in the morning, the world should have been silent, and most people were sleeping.

But Xue Xin's reply arrived almost in the next second-to be honest, this did not surprise Lin Xun.

Xue Xin replied just two words: "Fruit Shell."

Lin Xun understood what he meant, and there was no holographic cabin in his room, so he crept into the safe room and opened his game cabin-why not choose the architecture, not because of his opinion on the architecture, but Sleeping safely is dead.

After successfully sliding into the holographic cabin without waking up to safety, he closed the hatch and entered the holographic world, and the iris landed on his account. He set the default address in his home, or the big spaceship sailing in the galaxy.

-Then, when he stood next to the silver-white cabin, the visit application popped up,

"User'Player X'requested to visit your home. Agree to refuse."

Player X, Lin Xun remember this ID, this is Xue Xin's player ID.

He tapped the consent option, and player X appeared at the teleportation point. Xue Xin’s avatar was a young man in a white coat, looking very rigorous, like the kind of scientist that would appear in science fiction.

"Senior." Xue Xin looked at him.

"Hello." Lin Xun sat down at the long silver mechanical table and asked him: "Why meet in the nutshell?"

"I want to see the senior." Xue Xin said this first, and then laughed quickly: "Just kidding, because it's relatively safe here."

He bit the word "relatively" very hard.

Lin Xun: "Why is it unsafe outside?"

Xue Xin did not answer directly, but looked at him and said, "What does the senior want to talk to me?"

"I want to talk to you a lot." Lin Xun said: "But first I want to confirm that I can communicate with you barrier-free, and secondly I can believe you?"

"The seniors can confirm whatever they want," Xue Xindao said.

Lin Xun thought for a moment, and then said: "You can prove it yourself."

"Also." Xue Xin came over and sat down opposite the long table: "I want to think about how to prove it."

Lin Xun "hmm", and then stopped talking.

There is absolute silence in the virtual world. Time flows like this. About five minutes later, Xue Xin snapped his fingers: "I know."

"The seniors must have known a lot of things, and I know a lot of things." He looked at Lin Xun, "but the seniors obviously won't believe me easily. And the environment we are in is not necessarily safe, maybe which keyword Will bring danger."

Lin Xun raised his eyebrows lightly: "So?"

"So seniors and I play a game." Xue Xin stood up from the seat, his hands on the table, the whole person leaned forward in the direction of Lin Xun, saying one by one: "Zero knowledge proof."

Lin Xun looked at him with his arms and smiled: "Okay."

It is well known that a secret is called a secret because it has not been revealed. The best way to pass secrets is to minimize information leakage. So there is a zero-knowledge proof, a classic proposition in cryptography.

The entire proof process is completed by two parties, the prover and the verifier.

The prover holds a secret, and he wants to prove to the verifier that he has the secret. However, during the proof process, he could not divulge any knowledge about this secret. For example, Xue Xin owns a photo of Lin Xun’s bedroom room. He wants Wang Jingxin to believe that he owns the photo, not to mention any furniture, furnishings, colors, and details in the room. To show to others, the amount of information leakage must be 0.

Lin Xun looked at Xue Xin, waiting for his proof.

"I only say one word and two numbers, and the senior must understand what I want to say." Xue Xin's character left the mechanical table and walked a few steps in the room to the silver-white console of the capsule. His ID "Player X" is on his head.

"This word is very simple," Player X extended four fingers: "Four words, a very simple proposition."

Lin Xun hooked his lips and smiled, "Speak directly."

Player X said one by one: "Caesar password."

There was silence in the spaceship cabin.

Lin Xun turned his head to look to the left, the huge porthole of the spaceship.

The galaxy flows, the nebula changes, and the distant pulsar flashes regularly. Pulsars are a type of neutron star. In the universe, whenever a neutron star appears, it means the aging of a massive star. People used to think that stars were immutable, but they later discovered that even the sun would be extinguished. All the constantly updated scientific theories are telling people that the world you think is not the real world.

Lin Xun leaned back on the back of the chair, as if after a long time, he sighed softly and looked at Xue Xin: "How about two numbers?"

Xue Xin's voice rang in the empty cabin: "Two numbers, 6, 3."

Then, player X put his finger down: "All I want to say is this, senior, has my verification passed?"

Lin Xun looked at his burning eyes.

Caesar password, one of the simplest cryptosystems, requires only one shift operation for both encryption and decryption, and the number of bits moved is the key needed to crack this password.

If this key is 4. Then all the letters in the alphabet will be replaced by the fourth letter after it. ABCD becomes EFGH. The emperor sent a secret command "withdraw" to his general, even if it was intercepted by the enemy, because the encrypted "withdraw" became "zlwkgudz", a meaningless garbled code-unless they deciphered this The encryption method of the string letters is Caesar, and the key is 4.

The amount of calculation required for this kind of deciphering may be difficult in the era when the Caesar Code appeared, but now, or for Lin Xun, it is very simple.

Dongjun's work is very busy. He is often away, and Lin Xun can't be reached. Sometimes, in the morning, when Lin Xun woke up, he was no longer there. Sometimes, it was clearly a working day, but this person could stay with him all day long. Other times, this person's time off work seems exceptionally late, which allows Lin Xun to slip out and hit the monster without being discovered. His busyness and off work seem to be irregular unless he observes from another angle.

Sometimes Lin Xun hopes that he really just has unsteady commuting time due to various unexpected affairs of the Galaxy. Because when he shifted every 24 hours in these twenty days, he suddenly found another set of clear and regular time rotations.

Superficial chaos is often controlled by deeper laws. Time shift 6, shift date 3. Dongjun used his weekends to work with him, and the night when the work was over to accompany him during the day when he had nothing to do.

The dream-controlled collar tells the dreamer through the fluctuation of the current that this is a dream. For people without collars, what kind of signs should be set up to remind themselves that this is not true?

For Lin Xun, 6 and 3 are enough.

He lowered his eyes and said, "Passed."

Xue Xin said seriously: "The senior also passed my verification."

Lin Xun smiled: "You learned very well."

"I have learned a lot over the years to get closer to the seniors." Xue Xin laughed self-deprecatingly. "But the seniors have gone too fast. I have limited talents. Even if I try harder, Can run faster than others, but you have been in the sky."

"Thank you." Lin Xun refused to say: "But you have already made it, and I haven't even sold the product."

"Senior clearly knows that this is all--" Xue Xin seemed to blurt out something, and then stopped, said: "I have to be cautious."

Lin Xun thought that this young student was quite fun. He hadn't seen it for many years. Not only did he succeed in his career, but also greatly improved his cultural level, he used a set of idioms.

"Yinhe," Xue Xin looked at him. "Does the seniors know, me, and many others? When we saw the word "Yinhe," we thought of you first, and then he."

"Is that so?" Lin Xun's tone was careless, and even changed the subject, he asked: "Which version of the nut shell has been developed?"

Xue Xin replied: "The latest on the market is 5.0. I don't know which version of Galaxy has been developed."

Lin Xun raised an eyebrow: "Eagle can't even collect this kind of information?"

Xue Xin: "Yinhe's secrecy work is not so bad that even the shells will leak."

"That's right." Lin Xun said: "How many years is it now?"

Xue Xin: "2030."

Lin Xun: "My biggest concern is, is it a peaceful age?"

Xue Xinxiao: "Of course, it's a good time."

Lin Xun did not speak for a long time.

"Seniors have nothing else to ask?" Xue Xindao said: "I have a lot to say to you."

Lin Xun crossed his fingers and looked at him: "But I... don't want to listen."

Xue Xin lowered his eyes, his expression seemed sad: "You have always been like this."

"In fact, I can't say a lot of words. After all, we can't guarantee the absolute safety of the current environment." Xue Xin sighed.

"Well." Lin Xun responded lightly, then said: "In 2030, I am 27 years old."

"You have achieved success," Xue Xin seems to be thinking, saying: "However, although the Galaxy is more and more successful, there is less and less news about the seniors from the outside world. The social accounts of the seniors are rarely updated and rarely appear. I haven’t seen the senior once in those meetings and conferences. Sometimes, this situation reminds me of some early rumors about Dongjun and his family."

Lin Xun arms again and looks at him: "What do you want to say?"

Xue Xin shook his head, his voice was dumb: "I just want to remind the seniors that there is really a way to imprison a person forever in the world, and he will never find out."

Lin Xun was very indifferent when he heard his voice: "Why do you want me to find out?"

"Because the senior shouldn't be such a person!" Xue Xin's voice was suddenly raised, and then calmed down again. He looked out the porthole and his voice was very low: "I think the senior is free. You should be in 2030 forever Seeing new technologies and knowledge, working with the most talented team in the world, without being disturbed by anyone. Do whatever you want, do what you want. Work with whoever you want to work with."

Lin Xun smiled.

He sat upright towards Xue Xin and asked: "How can you help me out? And what arguments can make me... believe you?"

"Seniors don't have to believe me, and I'm not someone who can help you out." Xue Xindao said: "I just want to let the seniors know the truth. My abilities and qualifications are limited, so I can only do what I am now...sorry."

Lin Xun looked at him.

"But there is no shortage of people in the world who are willing to succeed you. Seniors, your relatives and friends, and even many roles that you don't know or unexpected." Xue Xindao: "I don't know whether the world where the seniors are If something unusual happens, there must be a reason. Someone has been creating opportunities for you."

"Thank you." Lin Xun said: "I will cherish the opportunity."

Xue Xin's expression was finally relieved: "Then I'm so happy-Senior, the previous performances of yours make me think you won't want to go out."

After playing the dumb puzzle for so long, Lin Xun was also tired. He was absent-minded, his voice was soft, and there was a trace of laziness: "Since I can go out, why don't I?"

"Then..." Xue Xin seemed to want to say something, but his voice didn't fall, and Lin Xun's eyes suddenly appeared a blood-red floating triangle.

"Warning, someone is violently knocking on the holographic cabin shell and cutting off the power, the system will be forced to shut down, 3, 2, 1..."

Lin Xun: "..."

The system was forced to shut down, and he returned to the real world in front of him. He got up from the cabin and took the initiative to open the hatch. As expected, Wang Jingan took the unplugged power plug in one hand and picked him up with one hand. His voice was angry: "You he Why the **** are you playing games here? We thought you were dragged away by the monster again! Your master has been looking for you for a while!"

Lin Xun: "...ah?"

Why did he involve his master again?

He poked his head out of the holographic cabin, and with this probe, he saw Old Huo walking quickly in front of himself.

Old Huo frowned, his expression dignified, and the speed of speech was extremely fast: "Red Sword of the Scarlet Dragonbird! Stolen upstairs with me!"