Chapter 1180: Cryptography is a specialty of mathematicians

After leaving the Jinling Institute of Higher Education, Director Li did not stop at Jinling, but rushed back to Shanghai overnight.
After spending two full days, he visited the top Daniels in the field of quantum computing in the major semiconductor research institutes in Shanghai and asked them implicitly about the security aspects of quantum computing technology.
Office of the Director of the Microelectronics Research Center.
After listening to Director Li's explanation of his visit and expressing his concerns about the security of quantum computer technology, Director Wu Jiancheng, who was in his seventies, smiled, and he did not hesitate to reject his idea.
"Your worries are superfluous. In theory, quantum computers do pose a threat to the security of asymmetric encryption algorithms, but this technology cannot be broken in a short time."
"As of now, even the most advanced quantum computer can only reach more than 20 qubits. Google's d-wave is unique in this respect and has achieved 80, but the gadget is actually very watery Large, instead of using a quantum gate circuit to control the qubit, it took a shortcut with the quantum annealing algorithm. Using the same algorithm, traditional supercomputing can even do better than it, and there is a lot of controversy in academia and industry. "
"Whether it is a true quantum computer with more than 20 qubits or a pseudo-quantum computer with more than 80 qubits, it is still a bit difficult to crack modern encryption technology. Take the most common rsa encryption algorithm as an example. The widely used prime factorization problem is difficult, and there are no problems with quantum computers with less than 200 qubits. "
Director Li said cautiously, "Is there no question at all?"
Director Wu Jiancheng continued: "The cracking cycle is more than one year, meaning that even a quantum computer with two hundred qubits, it takes more than a year to crack your bank card password. And here it is As long as the key changes during this period, everything has to start again. "
Any encryption rule is not a dead key in theory. When any one of the two parties evaluates that there may be a security risk, they will apply to replace the public key.
Looking at Director Li who was still letting go, he sighed and continued to speak with relief.
"The development of technology is a gentle process. When we have a quantum computer in the true sense, we will naturally develop corresponding encryption algorithms. This thing really doesn't need to worry too much!"
"But if," Commissioner Li tried to fabricate a reason, and continued, "if something like a technology explosion happens, we or our enemies suddenly master quantum computer technology-"
"This situation is impossible," said Director Wu Jiancheng, without interrupting Director Li's words. "The so-called technology explosion is just a layman's statement! Any new technology from discovery to development matures in time. There is a linear progression process on the scales. Especially in the 21st century, scientific research has changed from singles to teamwork. "
"If you think that quantum computer technology can break through tomorrow, then you can definitely find earlier papers on solving the problems of" decoherence "and" noise processing "! I can now get you the latest data from the database, I can be sure Tell you, none of the problems I've mentioned so far have a good solution! "
Looking at the determined expression on the face of Director Wu, Director Li's expression was a bit subtle and awkward.
He wanted to tell him the truth, but the matter was a bit important. All those who knew the situation were kept secret by his orders, and he couldn't break this case by himself.
"... I'm not a hypothesis? You can't guarantee whether others will hide it if they research it."
Seeing that Director Li was still "stubborn", he was superstitious about this kind of ridiculous matter, and Director Wu Jiancheng was too lazy to argue with him, and reluctantly nodded.
"If it's what you said, a quantum computer popped out of the stone."
"Maybe it really threatens our information security."
Hearing this sentence, one of the stones in Director Li's heart finally fell, but another heavier stone was put up again.
Sure enough, his worry was not unreasonable!
Fortunately, he found that in time, everything has a chance to remedy ...
Ending today's visit, Director Li went straight to his office.
It took him a whole day to write the report, and then he took it to Chang'an Street.
When he was standing in the familiar office, he saw the old man sitting behind the red wooden table, staring at the letter in his hand with glasses.
I don't know if it is his illusion, I always feel this letter is familiar.
However, he didn't think much, reached out and knocked gently on the open door.
Looking at Director Li at the door, the old man smiled slightly and lowered the letter in his hand a few inches, speaking softly.
"You came?"
"Well ... there is one thing I must report to you."
Director Li nodded and walked forward, saying in a serious voice, "I went to Jinling two days ago, and our academician Lu brought us another surprise."
"Since it's a surprise, why are you looking so serious?"
Hearing what Director Li said, the old man smiled, raised his hand to signal that he should stop first, and passed the letter in his hand.
"This letter, you can take a look first."
After a little hesitation, Director Li took the letter from the old man.
After scanning his eyes, he first glanced, then a helpless smile appeared on his face, and returned the letter to the smiling old man.
"... Looks like Professor Lu has thought it out."
"Yeah," the old man nodded with a smile, and said with emotion, "It is the fortunity of the Republic to have a scholar like Academician Lu."
After a pause, he converged the smile on his face and changed to the official expression to continue.
"Tell me what you think of this letter."
Director Li pondered for a long time and said.
"My advice is to keep it secret."
The expression on the old man's face did not change, he just asked.
"reason?"
"Although quantum computer technology has broken through, as Professor Lu has warned us in the letter, our society does not yet have a set of encryption algorithms that can cope with this method of decryption."
Having said that, Director Li paused for a moment and hurriedly observed the expression on the old man's face.
Seeing the old man nodded, he was relieved and continued.
"... I suggest that the Chinese Academy of Sciences should first let out some wind, so that all sectors of the society can make a preparation for this advanced research. After all, if it is Professor Lu ..."
Having said that, Director Li made a helpless smile on his face.
"I'm afraid it will really cause panic."
The old man nodded thoughtfully.
If it's a long process, it's better to say.
From the birth of a technology to its maturity, society may have adapted to the changes brought about by it in a subtle way.
But if it is suddenly announced that quantum computer technology has achieved a breakthrough of five hundred or more from one hundred qubits at a time, it is undoubtedly equivalent to announcing that the original encryption rules have been abolished.
This impact on finance, and even all industries that depend on information security, is the same as an atomic bomb that is directly overhead. The whole society has to adapt to this drastic change in a drastic way.
If anybody else stirs up the flames behind the scenes, it will really happen that crazy things like "take money out of the bank" and "terminate all online transactions" will happen.
Considering the influence of Professor Lu himself ...
There is almost no doubt at all that these things are bound to happen.
After all, for this scholar who has said what he must do and never exaggerate, almost most people will not doubt that the news shaking out of his mouth may be false.
After thinking for a long time, the old man said, "This matter cannot be kept under pressure. We must consider the feelings of Academician Lu. Moreover, the risks brought by new technology must be considered, but preventing the birth of new technology is against the trend of history. This kind of thing can't be done ~ EbookFREE.me ~ I think so too, "Director Li nodded." So my suggestion is, on the one hand, let the Chinese Academy of Sciences put some wind out and use a do n’t So sensitive, but not too small, the research team artificially created the heat in this area. Together with other propaganda machines, the quantum computer has become the next technology outlet. "
Old man: "What about the other side?"
Director Li: "On the other hand, as Academician Lu proposed! We must master an encryption algorithm that is difficult to crack even a quantum computer! Once we can master this algorithm, all the risks that quantum computing can bring are all Will translate into our advantage in this round of information technology revolution! "
He patted his thigh, the old man said with approval.
"That's right! Who do you think ... the task is better assigned to?"
Looking at the eyes of the old man's eyes, Director Li made a helpless expression in his heart.
Anyone with a discerning eye can see that the old man already has a suitable candidate in his heart, but it is clear that he intends to ask for it.
"... Encryption of information is a mathematician's specialty, and Academician Lu is the top mathematician in our country. Besides, he also made a quantum computer. No one knows the sharpness of this spear better than him. Even if it is psychological, The 'shield' created by him will also be more secure than others. "
"I propose that Professor Lu be in charge."
Hearing the answer that met his expectations, the old man's face smiled with approval.
"This proposal is good. I will personally write a reply to Academician Lu and appoint him to complete this difficult and glorious task!"
"As for the others, just do as you say."
Feeling the heavy pressure on his shoulders, Director Li nodded heavily.
"Yes!"