Secret War Silent

Deciphering single-letter encryption requires a certain reference text, and then analyzing the reference text, in simple terms, is to use probability in mathematics.

For example, in an article written in English, the probability of 26 letters appearing in an article can be replaced by the letters with the same probability in the encrypted sentence.

Of course, the ciphertext of one sentence is too short. If the text is longer, it will be easier, because if you count the probability, it must be that the more words, the more accurate.

But as long as you try one by one, it is only a matter of time to crack the ciphertext.

The probability of English 26 letters appearing in an article has long been researched, and this does not need to be counted again. If it is "multi-alphabet replacement encryption", it is much more difficult, and even the longer the article, the more difficult it is crack.

Yardley randomly made up an alternate alphabet, then wrote a conversation with this alphabet, encrypted it, and gave it to Luo Yao.

Luo Yao glanced at it, this conversation was not long.

Four sentences, the third sentence is a little bit long, and the others are very short.

But from a literal point of view, it is completely meaningless letters, which do not form words at all, and are completely incomprehensible, but there must be content in them.

Because it is "single-alphabet replacement", Luo Yao first began to calculate the frequency of each letter in this ciphertext, and then counted it before replacing it.

The basic method of breaking the substitution encryption method can be called the probability and statistics method.

Of course, different characters and languages ​​also have their own characteristics, such as what is the most used word in English, what is the most used letter in an English word, and so on.

The summary and application of these laws can achieve twice the result with half the effort in password deciphering.

As long as you master these, it is actually very simple to crack a single-letter encrypted ciphertext, as long as the IQ is not too low, it can be done quickly.

What's more, Luo Yao has already done some research in this area. Although he is self-taught, he is not a little bit better than those who become monks halfway through.

It took less than 10 minutes!

This single-letter encrypted ciphertext that Yardley wrote down at random was directly deciphered by Luo Yao, and he found it incredible that it was so fast.

Luo Yao took a look, wasn't this the code word he used to connect with Yardley!

Of course, he didn't know and couldn't see it before deciphering it, because there was no space in the middle of this ciphertext, and he couldn't guess it from the length of the sentence.

"Luo, you definitely have the talent to decipher codes!" Yardley excitedly gave Luo Yao a thumbs up.

"Mr. Yardley praised it. Single-letter substitution deciphering is the basis of cipher deciphering. Anyone can do it after a certain amount of training, but practice makes perfect." Luo Yao said with a modest smile.

"Luo, I think you can be my assistant in China!" Yardley said solemnly.

"assistant?"

"Yes, I need an assistant in China. You are not only proficient in English, but also understand code deciphering, so that our communication will be more convenient." Yardley said, "I will apply to the Chinese side."

"Mr. Yardley, didn't I tell you yesterday that I will be in charge of your life and work in China?" Luo Yao said.

"Really, I forgot, sorry, what did I ask you for just now?"

"Discuss how to carry out work in China..."

"Really, I didn't come to ask you for a drink?" Yardley said, slapping his forehead.

Luo Yao said very firmly: "Of course not, we just made an agreement yesterday that we will not drink during working hours during the day."

Chapter 0192 Finally arrived at the mountain city

Code deciphering is Yardley's specialty and his interest, otherwise he would not have achieved outstanding achievements in this field.

Therefore, someone who can communicate with him professionally, and even inspire him to draw inferences about other cases from one instance, feels like meeting a long-lost old friend and drinking together.

Therefore, Yardley also forgot that he had come to drink with Luo Yao.

In the entire hotel, the only person he could talk to was Luo Yao.

The other one is Gong Hui, although he can speak a few words, he also appreciates it, but he can also see that Gong Hui and Luo Yao have a very close relationship.

Although he is a womanizer, he is romantic but not obscene, and he did some homework before coming. Eastern women are different from Western women.

Especially serious women, they cannot be teased at will.

As for that kind of romantic place, it doesn't matter, anyway, everyone is talking about "money", if today is good, if you walk on the road tomorrow, you will not know anyone, so there is no psychological burden.

"Luo, the cigarettes you smoke are good, can you give me a few packs?" Yardley ran out of cigarettes, so he picked up Luo Yao's Three Fortress, and after smoking one, he thought it was very good. Just ask for it.

"Okay, I'll get you one later." Luo Yao said straightforwardly, between men, smoking and drinking are tools to get closer.

"Okay." Yardley smiled.

He felt that Luo Yao was his real friend from China, and the "Xiao" who arranged for him to leave the United States seemed a little serious and too careful.

……

In fact, Dai Yunong didn't think about how to arrange to invite Yardley back. After all, there is a telecommunications office in the military system, and the director Wei Daming has also made great achievements in deciphering encrypted codes.

Although Wei Daming also supports inviting Yardley to come to China, if an organization such as a cryptographic code breaking center is established, who will take the lead?

Wei Daming might not have this idea.

After all, this is to learn the most advanced deciphering technology from the Americans. If you learn the technology, you will be the authority, and no one will shake your position in the military command in the future.

But code deciphering is a secret department, it cannot be announced to the public, and it requires concentration. Can Wei Daming put his mind and body into it without reservation?

Obviously can't do it.

And now no one knows if this American named Yardley has real skills, and whether he can serve him well, but there is good news.

This American is quite honest. He actually brought to China the materials he had collected on deciphering secret codes and the Japanese codebooks at all levels that he had deciphered in the past.

There are many diplomatic-level cipher books used by Japan, which are of great reference value and cannot be bought with money.

This made Dai Yunong feel that it was worth spending the money. With a salary of one thousand dollars a month, according to the current exchange rate between fiat currency and U.S. dollars, one thousand dollars can be exchanged for more than ten thousand French currency.

A general in the party-state only gets a salary a month. Before the war, it was [-], but during the war it was only [-]. Raising one Yardley is enough to raise [-] generals.

How much does Dai Yunong only get for a month, 300 yuan.

"Boss, Yardley is here, how should we arrange it?" Dai Yunong is not in the mountain city, and Mao Qiwu is in charge of all the coordination.

Although there is another Zheng Jiemin above Mao, but he is only concurrently the chief secretary, and his actual work is in the second office of the Military Command Department of the Military Commission. He is the deputy director and concurrently the third director, in charge of military intelligence.

Wei Daming also works part-time in the Military Command Department, the director of the Telecommunications Department of the Fourth Division, and his military rank is also a major general.

Zheng also serves as the secretary-general of the Military Command Bureau, but he only appears in meetings as the secretary-general, and does not usually come to the Military Command Bureau at all.

With Dai Yunong not around, Mao Qiwu, the deputy chief secretary, is really in charge of the military command bureau. Mao Qiwu is not only Dai Yunong's confidant, but also a core figure in the Jiangshan faction, and a person who holds real power in the military command.

In the military system, the only person who can know Dai Yunong's whereabouts in real time is Mao Qiwu, and no one else can.

When Dai Yunong had something to do, he immediately consulted with Mao Qiwu. He knew that others might have second thoughts about him, but Mao Qiwu would not.

Moreover, several core departments of the headquarters of the Military Control Bureau are all controlled by people from Jiangshan. It is difficult for others, no matter how capable you are, to enter these departments.

"Arrange for him to stay first, and we must have a comprehensive consideration of his use." Dai Yunong said, "I mean, let Luo Yao be his assistant, responsible for cultivating secret communication and code deciphering Talents."

"Luo Yao, what about Jiangcheng?" Mao Qiwu asked in surprise.

"It's enough for Jiangcheng to choose someone from his team to succeed him. The foundation and framework have already been set up, and they can just complete it step by step." Dai Yunong said, "Jiangcheng District needs time to recover, and they can also take advantage of this period. It's time to develop and grow yourself, don't give them hard tasks."

"Then some work still needs to be done by him himself?"

"Well, we can consider letting him go back to the mountain city after the next year, hand over the work, and then come back." Dai Yunong nodded.

"Then I'll look for a place to live. This American guest can't be neglected." Mao Qiwu said.

"Find one on the south bank of the Jialing River, preferably far away from the downtown area. This will not only ensure Yardley's safety, but also help us conceal our work." Dai Yunong instructed.

"Yes." Mao Qiwu agreed, no one knew how many Japanese spies had sneaked into the mountain city.

……

While Dai Yunong and Mao Qiwu were discussing how to settle down with their American friends who came from afar, Luo Yao and Yardley had already boarded the train to return home.

Although there is nothing unusual here in Haiphong, Tan Si said that he has been here for almost ten years and has established a good relationship with the locals here.

How this relationship was established, Luo Yao didn't ask, but he vaguely heard Xiao Li mentioned that his adoptive father was honored as "Fourth Master" in Haiphong.

Even the local government departments have to give him three points of face, let alone the local Chinese.

There was a conflict between the local Chinese forces, Tan Siye was the mediator, and no one would dare not listen to his words. As for his status as a military commander.

For him, he can listen, but not listen.

Just having this identity is of great help in many ways.

Luo Yao and his party had five people, and Tan Si booked three of the best sleeper cars for them. Each car had two single beds, not bunk beds.

The Yunnan-Vietnam Railway is a narrow-gauge railway jointly built by China and France, part of which is in Annan and part in China, with a total length of less than [-] kilometers.

Even at a full speed of [-] kilometers per hour, it will take at least one day and one night to reach Kunming.

But this is obviously impossible.

The Yunnan-Vietnam Railway passes through 34 large and small stations along the way, and it takes at least 10 minutes to stay at each station, and some may be more than that.

Even if it arrives on the hour, it will take about two and a half days, which is why there are only two shifts a week.

Under normal circumstances, it takes about three days.

Therefore, I can only be a sleeper. If I sit on a hard seat for three days, it is estimated that I will not be able to straighten my waist by then.

Narrow-gauge railways naturally cannot have too wide carriages, and besides carrying passengers, this train also carried four sections of cargo. As the Japanese cut off China's coastline, the transportation requirements of the Yunnan-Vietnam railway increased sharply, and it has become very busy. It is planned to add a special freight train.

As for the efficiency of the French, it is really hard to say when they will be able to go online. Anyway, the domestic demand has surged, especially the demand for war materials. There is as much as you can eat.

For three days, Luo Yao didn't intend to sit on the train and fall asleep, and Yardley organized a basic course on code-breaking for him.

All in English.

Although this is not a necessary job for him, he feels that he has an obligation to do so, and in the process of organizing these courses, it is also a process of learning and understanding.

Although Yardley has many shortcomings, he has real talents, and he is willing to teach you these.

When we arrived at the mountain city, we probably wouldn't have the time to do this, so Luo Yao cherished this precious time.

Tan Si bought him a room with Gong Hui, but since he got in the car, he got into the same car with Yardley, and then started his own data collation and translation work.

Yardley was very relaxed and comfortable, drinking the Scotch brandy specially prepared for him by Luo Yao, chewing peanuts, crossing his legs, cheered up, and hummed an American country tune.

However, his voice is really not flattering, even if Luo Yao can bear it, if it were another person, he probably couldn't stand it long ago, and kicked him out.

Yardley both admired and felt sorry for Luo Yao, who was so incomprehensible. He left such a beautiful girlfriend alone, but came to accompany him, a bad old man. Of course, he also knew that the person Luo Yao really came to accompany was not He, but those materials, and the contents of the materials can be consulted with him at any time. Some things cannot be accurately expressed by literal translation alone. You have to talk with the writer to find a more accurate or appropriate language.

Otherwise, even if the information is translated and the user gets it, wouldn’t it be useless if they don’t understand it?

Luo Yao wants to ensure the accuracy of the translated materials. Even if these materials are used to train code-breaking talents in the military command, these talents may not and cannot be used by me in the future.

Now that these talents are cultivated, they will inevitably be used to deal with the biggest enemy at present, the Japanese invaders.

Even if it became the secret code deciphering center, that is, the Chinese version of the black room that Yardley was obsessed with, it was mainly aimed at the Japanese secret code communication.

What's more, if Dai Yunong really handed over the code deciphering center to himself, then he will have more autonomy and can do a lot of things.

In addition to changing Gong Hui's medicine and going back to his own car, Luo Yao stayed in Yardley's car for the past three days, sleeping for less than four hours a day, waking up, washing his face with cold water, and starting Dry.

When the train arrived at Kunming Station, Luo Yao actually wrote thousands of sheets of manuscript paper, used up the ink in an ink bottle, and bound them in a thick stack, which surprised even Yardley.

With such a strong workload, it may take him a month to do it, but Luo Yao finished it in three days, and it was done very well.

Yardley not only has a good impression of Luo Yao, but also respects him.

If all Chinese are like Luo Yao, then this nation is invincible.

Chapter 0193 Passing Dian City

The title of the previous chapter was wrong, it should be finally arriving in Dian City!

This is the first time for Luo Yao in Dian City, whether it is in the previous life or the present life, it seems that it is not right to say that, this city with the reputation of a sea of ​​flowers seems to be invisible now.

Diancheng is like spring all the year round.

This is true.

After getting off the train, Luo Yao took off his thick coat, but it was far from enough. Of course, it would not be elegant to take it off again.

The Diancheng Railway Station is a bit broken. After all, it has been built for many years, and the Dian King doesn't seem to have put his mind on building the infrastructure.

There is no way, without the army, he can't eat and sleep well.

Just such a border city, after the outbreak of the Anti-Japanese War, a large number of factories and colleges and universities in Shanghai and other inland areas migrated here.

This also promotes economic prosperity and cultural exchanges here in disguise.