Chapter 205: Quantum hacker

Xu Mang has no idea how to attack quantum communication, but he knows a truth. Quantum communication passwords cannot be cracked by mathematical methods unless they attack quantum communication devices by physical methods. Therefore, when the devices are absolutely secure, quantum communication It has absolute confidentiality, in other words it will never leak.
　　 In the notes of this tyrant, Xu Mang saw an unreasonable passage, using injection locking to crack the quantum key distribution.
　　 Under the analysis of the system, Xu Mang knew that this technology was a physical attack method, not a mathematical attack method, and used the mobile phone to find the concept of injection locking.
　　 It turned out to be an irresponsible article written in a certain column of the MIT Technology Review, and this irresponsible article directly reproduces the preprinted article on the attack on quantum communication.
　　 The so-called preprints are manuscripts that have not been peer-reviewed. Their value is not very high. There is a huge gap between them and traditional journals in terms of credibility, and there are huge differences in quality.
　　Some articles do have a very high level, but they are waiting for review by traditional journals. Many articles have many problems, and some are even unsightly.
Xu Mang also found this article on the attack on quantum communication with his mobile phone. A certain team built a prototype quantum cipher light path by himself, and then used injection locking to steal the information, so all of this is a preset situation. Become a complete steal.
　　 Xu Mang used hacker knowledge to analyze the method of using injection locking to crack quantum key distribution. In fact, it is similar to the bypass attack in traditional hackers, playing a tricky way.
　　 For example,
　　 On a computer with a power-on password, install a collector on the corner of the chip responsible for starting the computer, copy the power-on command directly, and then play it again.
Another example,
Today’s car ignitions are all electronic locks, which require the original key to match the password, but under normal circumstances, some thief directly digs a hole, pulls the fire wire out, and touches it and it’s done. Anyway, what the key does is nothing more than It is the problem of the switch closure of the two wires.
of course,
　　 Xu Mang is not questioning the article attacking quantum communication. This article itself exists as an academic research, but it was distorted by some bad media and then accidentally ignored by experts.
And Xu Mang wanted to tell Makarov that just installing something called an optical isolator can prevent such things from happening. Although any device is imperfect, adding it is better than nothing. At least the system tells himself to add it. An optical isolator.
　　 However,
　　 Although I know the English name of an optical isolator, there are still many highly professional words in it. Xu Mang is under great pressure on this.
　　 simply,
　　 found this schoolmaster.
　　 "Translation?"
　　 "What are you going to translate?" The school bully asked curiously: "My English is average."
　　 "Just be better than me."
"I just came into contact with physics, and I don’t know anything about it." Xu Mang said awkwardly: "I found that Makarov may have been negligent and quoted a wrong article. Although this issue is no longer a problem, I pursue Perfect performance is hard to accept."
"what?"
　　 "Wrong?"
　　 This academic bully looked at Xu Mang in surprise, questioning authority... Is this really good?
　　Science is about questioning in order to make progress. Natural science knows this way, but under normal circumstances, there is no equivalent to strength. Questioning authority is very dangerous and stupid.
"you..."
　　 "Are you sure?" Xueba checked again.
"Yes!"
　　 "Help me translate." Xu Mang smiled.
　　 Enthusiastic Xueba nodded, and said silently: "I am only responsible for translation, and I don't care about the others."
"Oh..."
after that,
　　 Xu Mang and this enthusiastic scholar approached Makarov, a quantum hacker expert, and briefly narrated the problem. At first, the bearded man was a little strange, and then discovered that he had indeed misquoted the content of a certain report.
　　 Actually,
　　 This error is harmless, but a mistake is a mistake. Makarov is very grateful for Xu Mang's correction.
　　 "He is thanking you."
　　 "Ask you... how did you... discover this problem." The enthusiastic learner said to Xu Mang.
"Oh..."
　　 "You tell him." Xu Mang said calmly: "I am actually a hacker too."
　　The words fall,
　　 Enthusiastic Xueba translated Xu Mang's words to Makarov.
　　 "He asked you...Are you also a hacker who specializes in attacking quantum communications?" said the enthusiastic Xueba.
　　 "No."
　　 "I am a traditional hacker." Xu Mang said: "But I study physics myself, and I can try to be a quantum hacker, and disclose all existing security vulnerabilities in the form of scientific papers to improve the standardization of quantum communication systems."
　　 said to Makarov enthusiastically.
　　 "He said you will be successful, and there is a chance to work together in the future." The enthusiastic Xueba said to Xu Mang.
　　 "OK"
The last sentence,
　　 Xu Mang played in person. If he can't even say OK, then he should jump off the building.
　　 It seems that Makarov is a big five and three thick, Xu Mang did not expect him to talk so easily. Generally speaking, foreigners are quite stubborn. At least Xu Mang thinks so, but there are also accidents.
　　 went back to my seat,
　　 Makarov continues his public class.
　　 While Xu Mang is searching for articles about attacking quantum communication, he found that there are very few articles about attacking quantum communication, only very few, and even most of them are published by this bearded Makarov.
　　 How about...
　　 "The system...what are the conditions for becoming a quantum hacker?"
　　 [After being identified by the system, to become a condition for quantum hackers, the host needs to have hacking skills, physical skills, and attributes-Germany, upgrade to two]
what?
　　 Still need to upgrade attributes?
　　 Is there a problem with the moral level of the buddies?
　　 Xu Mang had doubts about himself. A genius who remembered the mantra of the second cross in his heart was suspected by the system that there were defects in morality...
　　In other words...what will be the effect of upgrading Germany to two?
　　 Xu Mang, who has always been curious about unknown things, started to use his hands as cheap.
　　 open the system,
　　 Click on the attribute-the fastest mobile phone terminal of the German new 81 Chinese website: https:/
　　【Whether to upgrade-Germany】
　　【Yes】【No】
　　 Xu Mang repeatedly confirmed and chose Yes.
　　Upgrade,
　　My moral bottom line!
　　 a golden light,
　　 Xu Mang saw that his attribute morality had risen to two levels.
　　 check their attributes,
　　德: Level 2 (Exclusive Skill: Convince people by virtue)
　　智: Level 3 (exclusive skills: memory ability, comprehension ability)
　　 Body: Level 2 (Exclusive Skill: Beast Mode)
　　美: Level 1
　　 Lao: Level 1
　　 Upgrade card: 30
what's the situation?
　　Is there still the ability to convince people with virtue?
　　 Xu Mang clicked on the skill option to convince people with virtue.
　　 Serve people with morals: Some high-risk skills and usage conditions will be unlocked, giving the host more powerful abilities. This skill is a permanent passive skill.
I go!
　　 Labor and capital are fooled!
　　 Nima...
Xu Mang was discouraged. He had worked his own. Perhaps after a year or a half, he collected 150 upgrade cards and upgraded his intelligence to level 4. Who knows... this has to be done. Yeah!
　　 High-risk skills... what's special is part.
　　 also,
　　 Without a high moral level, he can't be a quantum hacker. It seems that Makarov's moral level is at least one level higher than himself.
　　 "Classmates!"
　　 "Professor Makarov is calling you." The kind-hearted scholar said to Xu Mang.
"What?"
"calls me?"
　　 Xu Mang came back to his senses and looked at him with a dazed expression: "Why?"
　　 The scholar said: "Professor Makarov was talking about digital attacks and physical attacks. He asked you to demonstrate the traditional digital attack methods."
　　 "Oh..." Xu Mang nodded.
　　 Next second,
　　 Xu Mang walked to the front desk in full view, of course... and his personal translator, the enthusiastic student.
　　 "He asked you to attack this notebook." Xueba said.
"Oh..."
　　 Xu Mang glanced at Makarov, saw him nodding to himself, and hurriedly said to Xueba: "How far is the attack? Completely paralyzed?"
　　 soon,
　　 Xueba said: "It's up to you."
　　 Follow me?
　　This... Isn't this bad?
　　 Xu Mang was taken aback, it seems that this laptop is not expensive.
　　 After getting a laptop, Xu Mang started to operate, but soon he found a problem. The other party's laptop was a bit difficult to invade, even quite cumbersome and complicated, and it took a while.
　　 At this time,
　　 Makarov started to teach. He used this notebook as a quantum device, and Xu Mang became the stealer.
　　 almost means to steal the content of quantum communication. Unless the laptop is stolen, it is impossible to steal any information through digital attacks.
　　 Then,
　　 Makarov talked about the operating mode of quantum communication in terms of confidentiality. In fact, it is the same as traditional cryptography. Through the algorithm and key, the algorithm of quantum communication cryptography is actually simpler than traditional.
of course,
　　 The key is not the algorithm, but the key. In quantum communication, the length of the key is N bits, and it can only be used once at a time. The next time the N-bit key is transmitted, it will be reconstructed.
　　 The summary is N-bit length, randomness and one-time. These three conditions are called one-time notes, which are absolutely impossible to decipher in cryptography. This law is proved by Claude Elwood Shannon.
At last,
Makarov explained a problem that the public is very confused. Quantum communication can only transmit keys. Because quantum mechanics can only generate random characters, and the amount of information of random characters is zero, it is impossible to use the quantum channel of quantum communication to transmit information. .
In addition, he explained a lot of questions that the public doubted...For example, how to realize key distribution is to use the two principles of quantum mechanics, the principle of superposition and the principle of measurement mutation, and how to know the information after having the key, which is used XOR encryption algorithm...
　　 of course is about to end,
　　 Makarov said to all the students present that his notebook is constructed like quantum cryptography in defense, so Xu Mang’s efforts will be useless.
　　 But...
　　 The voice just fell,
　　 On the huge projector screen, a photo of Xu Mang's prosperous beauty appeared.
　　"..."
　　"..."
　　"..."
　　 Fuck!
　　 Scared to death!
　　What's this special?
　　 Everyone present looked at the photos on the curtain with a dumb face~EbookFREE.me~ Why does it seem that the people on the photos are familiar.ァ新ヤ~⑧~1~中文网ωωω.χ~⒏~1zщ.còм
and many more,
　　 Isn’t that he!
at this time,
　　 Everyone reacted and looked at Xu Mang in horror. Didn’t it mean that the digital attack was invalid?
This...
　　 How does this work?
　　 Makarov also looked surprised, glanced at Xu Mang, then at his notebook.
　　 "He asked how you did it?" said the enthusiastic Xueba.
"His computer defense system is based on the existing code language and can only imitate the form of quantum cryptography, but the core is still the code..." Xu Mang shrugged and said with great ease: "I found a loophole at random, and then Just go in."
　　 Makarov couldn't help but give Xu Mang a thumbs up after hearing the enthusiastic translation.
　　 Then,
　　 Makarov explained why Xu Mang could invade the notebook, but actually copied Xu Mang's words and praised it casually.
　　 After the open class,
　　 Makarov asked Xu Mang for his contact information.
at the same time,
　　 There is a middle-aged man present who has developed a keen interest in Xu Mang. He is the director of the Department of Computer Science and Technology at Fuda.
This guy,
who is it?
　　......