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At four in the morning, the world should be silent, and most people are sleeping.
But Xue Xin's reply arrived almost in the next second - to be honest, this did not surprise Lin Xun.
Xue Xin replied with just two words: "Nutshell."
Lin Xun understood what he meant. 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 the safety Sleep is deadly.
After successfully slipping into the holographic cabin without waking up to safety, he closed the hatch and entered the holographic world, where Iris logged into his account. He set the default address at his home, which is still the big spaceship sailing in the galaxy.
—Then, the next moment he was in the silver-white cabin, the access request popped up,
"User 'Player X' has requested access to your homestead. Agree/deny."
Player X, Lin Xun remembers this ID, this is Xue Xin's player ID.
He clicked the agree option, and Player X appeared at the teleportation point. Xue Xin's avatar was a young man in a white lab coat. He looked very strict, 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 do you want to meet in a nutshell?"
"I want to see the senior." Xue Xin said this first, and then quickly laughed: "Just kidding, because it's relatively safe here."
He bit the word "relative" very hard.
Lin Xun: "Why is it unsafe outside?"
Xue Xin didn't answer directly, but looked at him and said, "What do you want to talk to me about, senior?"
"I want to talk to you about a lot of things." Lin Xun said, "But first, I want to make sure that I can communicate with you without any problems, and secondly, I want to make sure that I can trust you?"
"Senior can confirm whatever he wants." Xue Xindao.
Lin Xun thought for a moment, then said, "Prove it yourself."
"Also." Xue Xin came over and sat down on the opposite side of the long table: "I have to think about how to prove it."
Lin Xun gave a "um", and then stopped talking.
There was absolute silence in the virtual world, and the time flowed like this. About five minutes later, Xue Xin snapped his fingers: "I see."
"Senior must already know a lot of things, and I also know a lot of things." He looked at Lin Xun, "but the senior obviously won't believe me easily. And the environment we are in is not necessarily safe, maybe a keyword Dangerous."
Lin Xun raised his eyebrows lightly: "So?"
"So senior, let's play a game with me." Xue Xin got up from the seat, put his hands on the table, leaned forward slightly in the direction of Lin Xun, and said word by word, "Zero Knowledge Proof."
Lin Xun folded his arms and looked at him, then smiled: "Okay."
It is well known that a secret is called a secret because it is not revealed. The best way to pass on secrets is to minimize the leakage of information. So there is zero-knowledge proof, a classic proposition in cryptography.
The whole proof process consists of two parties, the prover and the verifier.
The prover has a secret in his hands, and he wants to prove to the verifier that he has the secret. However, during the proof process, he cannot reveal any knowledge about the secret. For example, Xue Xin owns a photo of Lin Xun's bedroom. He wants to convince Wang An An that he owns this photo, and he will not say any furniture, furnishings, colors and details in the room in the photo, let alone hold the photo in his hand. To show it to others, the amount of information leakage must be 0.
Lin Xun looked at Xue Xin, waiting for his proof.
"I only said one word and two numbers, the senior will definitely understand what I want to say." Xue Xin's character left the mechanical long table, walked a few steps in the room, and went to the silver-white console of the space capsule. With his ID "Player X" on his head.
"This word is very simple," Player X stretched out four fingers: "Four words, a very simple proposition."
Lin Xun hooked his lips and smiled: "Say it directly."
Player X said word by word: "Caesar's cipher."
Inside the cabin, there was silence.
Lin Xun turned to look to the left, the huge porthole of the spaceship.
The Milky Way flows, the nebula changes, and the distant pulsars flicker regularly. A pulsar is a type of neutron star. In the universe, every time 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 has a day when it goes out. All the scientific theories that are constantly being updated 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: "Where are the two numbers?"
Xue Xin's voice sounded in the empty cabin: "Two numbers, 6, 3."
Afterwards, Player X put his finger down: "That's all I want to say, senior, did my verification pass?"
Lin Xun looked at his burning eyes.
Caesar cipher, one of the simplest cryptosystems, requires only one shift operation for both encryption and decryption, and the number of bits shifted is the key required to crack the cipher.
Suppose this key is 4. Then all letters of the alphabet will be replaced by the fourth letter after it. ACD becomes EFGH. The emperor sent a secret order "ithdra" to his generals, and it didn't matter if they were intercepted by the enemy, because after encryption "ithdra" became "zlkudz", a string of meaningless gibberish - unless they deciphered the string The encryption method of the letters is Caesar, and the key is 4.
The amount of calculation required for this kind of deciphering may have been difficult in the era when the Caesar cipher appeared, but now, or for Lin Xun, it is very simple.
Dongjun's work is very busy, he is absent a lot of the time, and Lin Xun can't contact him. Sometimes, in the morning, when Lin Xun woke up, he was gone, and sometimes, it was a working day, but this person could stay with him for a whole day. At other times, this person got off work very late, which allowed Lin Xun to sneak out to fight monsters without being discovered. His busyness and commuting seem to be erratic unless observed from another angle.
Sometimes Lin Xun hopes that he is really just simply having unstable commute time because of various unexpected affairs in the galaxy. Because when he shifted each 24 hours of these more than 20 days, he suddenly discovered another set of clear and regular time rotations.
Superficial chaos is often governed by deeper laws. The time is shifted by 6 and the date is shifted by 3. Dongjun spends his weekends working with him, and uses the nights when his work ends to accompany him during the days when he has nothing to do.
The dream-controlled collar tells the dreamer that it is a dream by means of electrical fluctuations. What kind of sign should a person without a collar put up to remind himself that this is not real
For Lin Xun, 6 and 3, these two numbers 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, all in order to be closer to the senior." Xue Xin laughed at himself: "But the senior has gone much faster than me. My talent is limited, no matter how hard I try, I can only Can run a little faster than others, but you are always in the sky."
"Thank you." Lin Xun said noncommittally: "But you are already famous, and I haven't even sold the product."
"Senior clearly knows that this is all-" Xue Xin seemed to be about to blurt out something, then stopped and said, "I have to be more cautious in my words and deeds."
Lin Xun thinks that this junior is quite fun. He hasn't seen him for many years. Not only has he succeeded in his career, but his educational level has also been greatly improved. He uses a set of idioms.
"Yinhe," Xue Xin looked at him, "do you know, senior, me, and many others, when we saw the word "Yinhe", the first thing that came to our mind was you, and then him."
"Is that so?" Lin Xun's tone was casual, and he even changed the subject. He asked, "Which version of Nutshell has been developed?"
Xue Xin replied: "The chapter on the market is going to launch 5.0. I don't know which version Galaxy has developed."
Lin Xun raised his eyebrows: "Can't Eagle even collect this kind of information?"
Xue Xin: "Galaxy's secrecy is not so bad that even the nut shell will be leaked."
"That's right." Lin Xun said, "How many years is it now?"
Xue Xin: "2030."
Lin Xun: "The question I am most concerned about is, is it an era of peace?"
Xue Xinxiao: "Of course, it's a good era."
Lin Xun didn't speak for a long time.
"Do you have anything else to ask, senior?" Xue Xin said, "I have a lot to say to you."
Lin Xun interlaced his fingers and looked at him: "But I... don't really want to hear it."
Xue Xin lowered his eyes, his expression seemed to be gloomy: "You have always been like this."
"But in fact, I have a lot to say. After all, we can't guarantee the absolute safety of the current environment." Xue Xin sighed.
"Well." Lin Xun responded lightly, and then said, "In 2030, I will be 27 years old."
"You have already achieved success." Xue Xin seemed to be thinking about his words and said, "However, although Galaxy is becoming more and more successful, there is less and less news about seniors from the outside world, and seniors' social accounts are rarely updated, and they rarely show up. Those meetings and press conferences, I have not seen the senior once. Sometimes, this situation reminds me of some early rumors about Dongjun and his family. "
Lin Xun crossed his arms again and looked at him: "What do you want to say?"
Xue Xin shook his head, his voice was a little hoarse: "I just want to remind the senior that there is really a way to imprison a person forever in the world, and he will never find out."
Lin Xun heard his own voice indifferent: "Then why did you let me find out?"
"Because the senior shouldn't be such a person!" Xue Xin's voice rose abruptly for a moment, and then softened again. He looked out the porthole in a low voice: "I think the senior is free. You should be in 2030, forever See new technology and knowledge, and work with the most talented team in the world without anyone interrupting. Do what you want to do. Work with whoever you want."
Lin Xun smiled.
He sat up straight to Xue Xin and asked, "Then how are you going to help me out? What arguments can I have to... believe you?"
"Senior don't believe me, I'm not the one who can help you out." Xue Xindao: "I just want to let the senior know the truth. My abilities and qualifications are limited, so I can only get to where I am now... I'm sorry."
Lin Xun looked at him.
"But there is no shortage of people in the world who are willing to go on and on for you. Seniors, your relatives and friends, and even a lot of characters you don't know or have unexpected." Xue Xindao: "I don't know if the world where seniors are located will appear. Abnormal circumstances, if they occur, there must be a reason, and someone has been creating opportunities for you."
"Thank you." Lin Xun said, "I will cherish the opportunity."
Xue Xin's feelings were finally relieved: "Then I'm so happy—senior, your previous performance made me think you wouldn't want to go out."
Lin Xun was also tired after playing dumb riddles for so long. He was absent-minded, his voice was soft, and he said with a hint of laziness: "Since I can go out, why don't I?"
"Then..." Xue Xin seemed to want to say something, but before he finished speaking, a blood-red floating triangle suddenly appeared in front of Lin Xun's eyes.
"Warning, someone is violently knocking on the shell of the holographic capsule and cutting off the power supply, the system is about to be forced to shut down, 3, 2, 1..."
Lin Xun: "..."
The system was forced to shut down, and he returned to the real world with a black eye, got up from the cabin, and pushed open the hatch cover. How the hell are you hiding here to play games? We thought you were dragged away by monsters again! Your master has been looking for you for a long time!"
Lin Xun: "... ah?"
Why is his master involved again
He stuck his head out of the holographic cabin, and with this probe, he saw old man Huo hurriedly walking in front of him.
Old Man Huo frowned, his emotions dignified, and he spoke very fast: "The Scarlet Sky Dragon Sparrow Sword is stolen! Quickly go upstairs with me!"