"Yuping, Yuping, look, this is the Barefoot Doctor's Manual I just bought. It's another work by Mr. Zhang San. It's an authentic copy published by Xinhua News Agency. I finally got it. Here it is." A young and energetic man
The boy ran into the public reading room and came to a girl. He was a little out of breath, and then he placed the brand-new book he just bought in front of the girl.
"Thank you, Haicheng, this book is very useful to me."
This girl with a gentle temperament was startled for a moment when she saw the barefoot doctor's manual on the table. There was surprise in her eyes, and then she thanked the boy: "It's my birthday next week. Do you have time? If so, we can
Let’s go have dinner together.”
"Yes, yes, of course." The boy nodded repeatedly and smiled.
"Thank you." The girl smiled.
"Brother Ziqian, hahaha, what do you think this is? I finally bought it!" Immediately afterwards, another boy ran in. In his excitement, he seemed to have forgotten the discipline of keeping quiet in the library, and came to a man who was in the process of buying it.
The boy who was studying in front of the table said excitedly.
"Ah! Why can't I buy it? My old man has been urging me. Good brother, how about selling it to me for ten yuan?"
"Brother Ziqian, talking about money hurts feelings. I can lend you a copy, but I won't buy the book. This is the first batch of manuscripts published by Xinhua News Agency. It has both collection value and extremely high practical value."
"The full text of this book is 2.6 million words, how to copy it..."
"Brother Ziqian, I advise you to buy a copy as soon as possible. The value of this book is really too high. Moreover, the size of Xinhua News Agency is not enough to publish enough to meet the market demand. In a short time, I
I feel that printing 20,000 copies is the limit. The situation in Peiping is tense now, and the Japanese will invade suddenly tomorrow, and you will not be able to buy books at all by then."
"Is this book available for purchase? It's not a pirated copy from a roadside stall in front of the school in middle school. That's all. I won't study today. I'm going to try my luck."
"Brother, I'm sorry, what kind of book is your barefoot doctor's manual?"
"This is a medical book written by Mr. Zhang San. It records a lot of disease diagnosis and treatment methods, as well as various prescriptions and medicines. With this book, you can treat colds and fevers by yourself."
"What, isn't this the same as the Compendium of Materia Medica?"
"There is still a difference, Compendium of Materia Medica..."
The original quiet atmosphere in the public reading room completely dissipated, and the student group circulated information about the Barefoot Doctor's Manual to each other, and there was a lot of discussion and excitement.
"It turns out that it has been published and sold, which is quite good." In the corner of the reading room, Yu Hua put down his pen and retreated from his highly focused study state. There was movement in his ears, and he listened quietly to the discussion among his classmates. After understanding the situation,
, a smile appeared on the corner of his mouth.
Sure enough, Xinhua News Agency did not disappoint him.
As originally thought, it was uncertain whether other newspapers and bookstores could publish the abridged version of the Barefoot Doctor's Handbook, but Yu Hua was certain that Xinhua News Agency, which was backed by the organization, would definitely publish the Barefoot Doctor's Handbook at his request.
I hope this general medical classic can be spread throughout China and play its due role.
Compared with the era when the barefoot doctor's manual was published in the previous life, today's era of all-out anti-war requires this classic that condenses the essence of medicine.
It is Yu Hua's hope that his compatriots and frontline soldiers will die less.
After thinking about it, Yu Hua put the matter of the Barefoot Doctor's Manual behind him, no longer paying attention to it, and turned his attention to the notebook on the desktop.
About a month and a half has passed since the start of the Yu's Seven Towers project. Now, Yu Hua, who has been studying analytic number theory and discrete logarithm problems for a long time, has finally completed his first goal after entering Tsinghua University.
Asymmetric cryptography theory results!
Inside the notebook is the core cornerstone of asymmetric cryptography theory results—the private key encryption algorithm and algorithm cipher table!
This is a major breakthrough in contemporary classical cryptography. Compared with the Enigma machine, the pinnacle product of classical cryptography adopted by the German army, the asymmetric cryptography that has been changed from the basic level is ten times more secure.
Convenient, fast, extremely timely and extremely safe.
These are all the characteristics of the first-generation encryption algorithm of the asymmetric cryptosystem. For now, it is impossible for any country in the world to decipher the defense layer built by the first-generation encryption algorithm using any attack method.
"From now on, I am also a cryptography expert."
Yu Hua glanced at the results of his hard work in the notebook, smiled slightly, and stretched out comfortably: "I've finished the first draft of the paper again. After this paper is published, maybe the British in history will decipher the German Enigma
The thing about the machine will not happen. The combination of asymmetric cipher + Enigma machine, even if I want to decipher the password of this encryption mechanism, it will take more than a year and a half."
I have to say that Yu Hua is extremely satisfied with his work.
As the most practical cryptographic machine in modern times, the Enigma machine adopts a dynamically changing form of symmetric cryptography, and its cryptographic security is completely at the peak level of the symmetric cryptography era.
This is the most advanced information encryption machine in the world. In theory, the Enigma machine's password has one hundred billion possibilities and is almost impossible to be deciphered by brute force attacks. Historically, the super secret plans implemented by the British can be deciphered.
The German Enigma machine had a lot of luck in it.
However, times are different now.
The entire world will embrace the era of asymmetric cryptography decades in advance.
Based on asymmetric cryptography, coupled with the most advanced Enigma machine, it has unprecedented guarantees in terms of password security.
Without wasting any more time, Yu Hua took out a piece of manuscript paper from his schoolbag, picked up a pen in his right hand, filled some ink, and began to write a paper on asymmetric cryptography theory.
The title of the paper is "The Impact and Function of Asymmetric Cryptography on Cryptography". Yu Hua clearly explains the basic concepts of the asymmetric cryptography system, and then talks about the relationship and function between public keys and private keys from the beginning, and the improvement coefficient of cryptographic security.
Carefully compare the advantages and disadvantages between current symmetric ciphers and asymmetric ciphers.
The security is improved by orders of magnitude, and with high timeliness, asymmetric passwords almost crush symmetric passwords in all aspects.
Of course, Yu Hua did not add such core things as the first set of encryption algorithms and algorithm cipher tables foolishly.
The first set of encryption algorithm architecture is a core secret and cannot be exposed, but the discrete logarithm as the basic architecture is no problem.
There is no need to cover up this kind of directional content, because mathematicians from various countries are not idiots. As long as they take a look at the results, they can immediately come up with the most suitable mathematical theory for asymmetric cryptography.
The algorithmic code table has two systems, Chinese dialect and Peking Mandarin. They are both important core secrets. In a popular sense, this thing is a serious code table. Once it is leaked...
It's no big deal.
It's just that the algorithm password table made by Yu Hua is invalid. Several days of hard work have been in vain and it needs to be made again.
But Yu Hua didn't have the time to fiddle around. It was the last word to publish the results quickly and move on to the next stage.
The whole paper was written very quickly, and what should be written and what should not be written. Nowadays, Yu Hua can be said to be very knowledgeable.
The reading room gradually became quiet. More than two hours later, 5,000 words of heavyweight results in the field of cryptography were released. He checked it again as usual to confirm that it was correct. Yu Hua quickly put the paper and notebook into his school bag, stood up and left.
Go downstairs and go straight to the west courtyard.