I Don’t Want to Win Lying Down

Xu Mang didn't know how to attack quantum communication at all, but he knew a truth. Quantum communication passwords cannot be cracked by mathematical methods unless physical methods are used to attack quantum communication equipment. Therefore, when the equipment is absolutely safe, quantum communication It has absolute confidentiality, in other words, it will never leak.

In the notes of this top student, Xu Mang saw an unreasonable paragraph, using injection locking to crack quantum key distribution.

After systematic analysis, Xu Mang knew that this technique was a physical attack method, not a mathematical attack method, and used the mobile phone to find out the concept of injection locking.

It turned out to be a reference to an irresponsible article written by a certain column of MIT Technology Review, and this irresponsible article directly reproduced the article about attacking quantum communication in the preprint.

The so-called preprints are manuscripts that have not been peer-reviewed, and their value is not very high. There is a huge gap in credibility with traditional journals, and there is also a huge difference in quality.

Some articles are indeed of a very high level, but they are waiting for review by traditional journals, and many articles have many problems, even some are unsightly.

Regarding the article on attacking quantum communication, Xu Mang also found it on his mobile phone. A certain team built a prototype quantum cryptography optical path, and then used injection locking to steal the information, so all of this was pre-set. Become done stealing.

Using his knowledge of hacking, Xu Mang analyzed that the method of using injection locking to crack quantum key distribution is actually similar to the side-channel attack in traditional hackers, playing crooked ways.

for example,

On a computer with a power-on password, install a collector in the corner of the chip tube responsible for starting the computer, copy the power-on command directly, and then play it again.

Another example,

Today's car ignition is all electronic locks, and the original key is needed to match the code, but in general, some thieves just dig a hole, pull out the live wire, touch it and it's over. Anyway, what the key does is nothing more than It is the switch closure problem of the two wires.

certainly,

Xu Mang wasn't questioning the article that attacked quantum communication. This article itself existed as an academic research, but the facts were distorted by some bad media, and then accidentally ignored by experts.

And Xu Mang just wanted to tell Makarov that just installing something called an optical isolator can prevent such a thing from happening. Although any device is imperfect, it is better to add it than nothing. At least the system tells itself to add it. an optoisolator.

However,

Although he knew the English name of the optical isolator, there were many highly professional words in it, and Xu Mang expressed great pressure on it.

Simply,

Found this master student.

translate?

What are you going to translate? the academic bully asked curiously, My English is average.

Just be better than me.

I'm new to physics, so I don't know much about it. Xu Mang said awkwardly: I found that Makarov may have been negligent and quoted a wrong article. Although this problem is no longer a problem, the pursuit of It's hard for me to be perfect.

What?

mistake?

The school bully looked at Xu Mang in surprise, questioning the authority... Is this really okay?

Science requires questioning in order to make progress, which is natural for academic masters to understand.

But under normal circumstances, what does not correspond is strength, and it is very dangerous and stupid to question authority.

you...

Are you sure? Xueba reconfirmed.

Yes!

Translate for me. Xu Mang smiled.

The enthusiastic Xueba nodded and said silently: I'm only in charge of translation, I don't care about the rest.

oh...

after,

Xu Mang and the enthusiastic student found Makarov, an expert in quantum hacking, and briefly explained the problem. At first, the bearded man was a little strange, but then he realized that he had indeed misquoted a certain report.

actually,

This mistake was harmless, but a mistake was a mistake, and Makarov was very grateful for Xu Mang's correction.

He is thanking you.

Ask you...how did you...discover this problem. The enthusiastic student said to Xu Mang.

oh...

Tell him. Xu Mang said calmly, I'm actually a hacker too.

words fall,

The enthusiastic scholar translated Xu Mang's words to Makarov.

He asked you... are you also a hacker who specializes in attacking quantum communication? said the enthusiastic student.

no.

I'm a traditional hacker. Xu Mang said, But I study physics myself, so 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.

The enthusiastic student said to Makarov.

He said that you will definitely succeed, and you can work together if you have a chance in the future. The enthusiastic Xueba said to Xu Mang.

OK

The last sentence,

Xu Mang played in person. If he couldn't even say OK, then he should jump off the building himself.

Xu Mang didn't expect Makarov to be so easy-going, who seemed like a big-headed and thick-skinned man. Generally speaking, foreigners were quite stubborn, at least Xu Mang thought so, but there were also surprises.

back to your seat,

Makarov continued his public lecture.

And Xu Mang was searching for articles about attacking quantum communication, and he found that there were very few articles about attacking quantum communication, and most of them were published by the bearded Makarov.

or...

What are the conditions for a system to become a quantum hacker?

[Identified by the system, the conditions for becoming a quantum hacker, the host needs to have hacking skills, physical skills, and the attribute - Germany, upgraded to two]

What?

Still need to upgrade properties?

Is there a problem with the moral level of the buddies?

Xu Mang had doubts about himself. A genius who had memorized the twenty-character mantra in his heart was suspected by the system of being flawed...

In other words... what effect will it have if the virtue is upgraded to two?

Xu Mang, who was always curious about the unknown, started to get dirty with his hands.

turn on the system,

Click Properties——Dexin 81 Chinese website is updated the fastest Mobile terminal: https:/

【Whether to upgrade - Germany】

【whether】

Xu Mang double-checked and chose Yes.

upgrade it

My moral bottom line!

a golden light,

Xu Mang saw that his attribute virtue had risen to two levels.

View your own properties,

Virtue: Level 2 (Exclusive Skill: Convincing People with Virtue)

Wisdom: Level 3 (Exclusive Skills: Memory Ability, Comprehension Ability)

Body: Level 2 (Exclusive Skill: Beast Mode)

Beauty: Level 1

Law: Level 1

Upgrade Card: 30

what's the situation?

There is also the skill of convincing people with virtue?

Xu Mang clicked on the skill option of convincing people with virtue.

Convincing people with virtue: 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 has been fooled!

Nima...

Xu Mang was disheartened. He worked hard on his own, and maybe endured it for a year or so. He collected 150 upgrade cards, and then upgraded his intelligence to level 4. Who knows... this would cost him money ah!

High-risk skills... What's more, it's part of it.

Too,

Without a high moral level, one cannot be a quantum hacker. It seems that Makarov's moral level is at least one level higher than his own.

classmate!

Professor Makarov is calling you. The kind-hearted academic bully said to Xu Mang.

What?

calls me?

Xu Mang came back to his senses, and looked at him in bewilderment: Why?

The school bully said: Professor Makarov was talking about digital and physical attacks just now, and he asked you to demonstrate the traditional digital attack methods.

Oh... Xu Mang nodded.

next second,

Xu Mang walked to the front desk under the watchful eyes of everyone, and of course...and his personal translator, the warm-hearted top student.

He asked you to attack this notebook. Xueba said.

oh...

Xu Mang glanced at Makarov, saw him nodding at him, and hurriedly said to Xueba, How far is the attack? Completely paralyzed?

soon,

Xueba said: It's up to you.

with me?

This...isn't that good?

Xu Mang was stunned for a moment, it seemed that this notebook was not expensive.

After getting a laptop, Xu Mang started to operate it, but soon he found a problem. The other party's laptop was difficult to hack, and it was even quite cumbersome and complicated, and it took a little time.

At this time,

Makarov started to teach. He regarded the notebook as a quantum device, and Xu Mang became the one who stole it.

It almost means to steal the content of quantum communication. Unless this laptop is taken away, it is impossible to steal any information through digital attack.

Subsequently,

Makarov described the operation mode of quantum communication in terms of secrecy. In fact, it is the same as traditional ciphers. Through algorithms and keys, the algorithm of quantum communication ciphers is actually simpler than traditional ones.

certainly,

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. When the N-bit key is transmitted next time, it will be reconstructed.

The summary is N-bit length, randomness, and one-time. These three conditions are called one-time notes. It is absolutely impossible to decipher in cryptography. This law was 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 in random characters is zero, so the quantum channel of quantum communication cannot be used to transmit information. .

In addition, he explained many questions that the public is puzzled... For example, how to realize key distribution is to use the two principles of quantum mechanics, the principle of superposition and the principle of mutation measurement, and how to know the information after having the key, which is used XOR encryption algorithm...

Of course it's coming to an end,

Makarov told all the students present that his notebook was constructed like quantum cryptography in defense, so Xu Mang's efforts would be useless.

But...

As soon as the voice fell,

On the huge projector screen, a photo of Xu Mang's prosperous beauty appeared.

...

...

...

Fuck!

Scary!

What the hell is going on?

Everyone present looked at the photo on the curtain in bewilderment, why did the person in the photo seem familiar.ァ新ヤ~⑧~1~中文网ωωω.χ~⒏~1zщ.còм

etc,

Isn't it him!

at this time,

Everyone came to their senses and looked at Xu Mang in horror. Didn't they say that the digital attack was ineffective?

this...

How did this work?

Makarov was also surprised. He glanced at Xu Mang and then at his notebook.

He asked you how you did it? the enthusiastic Xueba said.

His computer defense system is based on the existing code language, which can only imitate the form of quantum cryptography, but the core is code... Xu Mang shrugged, and said with great ease: I found a loophole at random, and then Just go in.

Hearing the translation from the enthusiastic scholar, Makarov couldn't help giving Xu Mang a thumbs up.

Subsequently,

Makarov explained why Xu Mang was able to hack into the notebook. In fact, he just copied Xu Mang's words and praised him casually.

After the public lecture,

Makarov asked Xu Mang for his contact information.

at the same time,

There was a middle-aged man who was very interested in Xu Mang. He was the director of the Department of Computer Science and Technology at Fuda.

This guy,

who is it?

 …