In a piece of text, adding a password is a relatively simple encryption method.

The more advanced encryption methods in foreign countries have used cipher machines, and the letter changes instead of the original meaning.

As a simple example, A may be S, and S may be D, which requires a professional cipher machine.

And thirty days a month, a different decryption table is used every day, which means that the encryption method is different every day.

Obviously, the four pieces of paper on Yu Jingque's desk have not been encrypted to such an extent, and they can only be regarded as the simplest encryption.

It's nothing more than having a pattern.

Another simple example is a hidden head poem, a hidden tail poem and something like that.

To be a little more complicated, it's the first word in the first line, the second word in the second line, and the third word in the third line......

But even if it's simple, it's not that simple.

What Yu Jingque wants to say is that the principle is the same, the principle of encryption is the same, and the question is what law is used.

Even encryption, odd encryption, or decreasing sequential ......

What exactly was used in this, Yu Jingque didn't know at all.

With a black eye, if you want to decrypt it, I'm afraid it's very difficult.

Yu Jingque suddenly remembered that Ji Youning taught mathematics, would he be very interested in these studies?

Thinking about it, even if Ji Youning is really researched, Yu Jingque doesn't dare to show it to Ji Youning, let alone let Ji Youning solve the mystery.

If there is only one piece of paper, Yu Jingque can still try to see if the blind cat can meet the dead mouse, but here are four of them.

Intuition?

Yu Jingque heard Chen Xiqiao say that in this industry, evidence is very important, but sometimes, intuition is equally important.

Four sheets of paper, one of four?

Yu Jingque shook his head, he thought that he had no gambler mentality, and the probability of choosing one of the four was not large.

The probability of choosing the right one is 25 percent, but the probability of choosing the wrong one is as high as 75 percent.

This is an unequal choice, and it is difficult for Yu Jingque to make up his mind to make a decision.

No, wait......

Yu Jingque suddenly had a flash of inspiration, he came out of the study and ran into the room.

"Are you done?" When Ji Youning saw Yu Jingque coming in, he thought he was done.

Yu Jingque said while getting dressed: "You rest first, I'm going to go out." ”

Without waiting for Ji Youning to ask, Yu Jingque left the room and put on his coat downstairs.

shouted to Yu Mosheng: "I'll drive the car." ”

The key was taken away directly by Yu Jingque, and Yu Mosheng hadn't even come to remember to speak.

Driving out, Yu Jingque knew in his heart how he should judge.

The leaflets posted by Zhou Jiezhi are purposeful.

He won't post it everywhere, he will only post it on the designated bulletin board.

But other flyers are posted everywhere because they have no purpose and are meant to let more people know.

All Yu has to do now is drive to the nearby bulletin boards, and street lamp poles, and look for them on the walls.

If you find something that is the same as the one on four flyers in your home, you can rule it out.

After driving over, Yu Jingque took the lead in looking at the nearby street lamp poles, as well as on the walls.

If Yu Jingque ran directly to the other bulletin boards, those flyers would also be covered underneath, and Yu Jingque would also need to peel them off, which was too troublesome.

Yu Jingque ran over from street lamp to street lamp.

With a happy smile on his face, find one and rule it out directly.

After also finding one on the wall, exclude.

Along the way, I found another bulletin board, and sure enough, it was covered with new flyers.

Yu Jingque did not rush to peel them off, continued to search the wall, and found another one.

All three were found, and only one was not repeated, which is already very telling.

Run back to the car and drive home.

Threw the key to Yu Mosheng and ran up to the second floor.

Use the key to open the study and lock the door when you enter.

Take three pieces of paper off the table and throw them all away.

With a lighter, burn all the waste paper, leaving only the last one.

A missing person notice.

In recent years, there have been a lot of missing person notices.

In the turbulent years, there were many displacements, and there were many separations.

Missing person notices are not unusual, and they will not attract attention.

It's just that there is no contact number on this missing person notice, only a contact address.

Yu Jingque didn't bother to check, either there was no such place, or this place had nothing to do with Zhou Jie.

There is a lot of text in the missing person notice, but there is no photo.

To describe the appearance in words, this passage is very long.

There is also the time when it was lost, the place where it was lost, and so on.

In short, an article is written with a lot of words and is densely packed.

But what is really useful in this, Yu Jingque thinks may not be more than ten words.

But what are the ten words?

Here comes the hard part.

Peeling off these papers can only be regarded as the first step, be patient, and there is no problem.

It's not difficult to find this missing person notice, and it can still be done with a little brain.

The last step is to extract the most critical information in this missing person notice, which is the most difficult step.

Yu Jingque has been trained in encryption and also in decryption.

In fact, it's just a gold sticker on their face, and the things they train are just children's play in the eyes of professional communication personnel.

Indeed, what Yu Jingque and they played before could only be regarded as a decryption game.

Since you can only decrypt the game, you can only use the missing person notice in your hand as a decryption game.

Zhou Jiezhi's encryption method will not be too difficult, because the conditions do not allow him to encrypt passwords that are too difficult.

And if it was difficult, Zhou Jiezhi would not have done anything to Huang Tian, he should have enough confidence that Huang Tian couldn't see it.

Zhou Jiezhi did not calm down and moved, indicating that the password was not as difficult as he imagined.

Those who are difficult will not, and those who will will not be difficult.

Those who don't understand feel that it's the same as the Book of Heaven, but those who understand it feel too simple, and I'm afraid they can't hide it from everyone.

The missing person notice was read by Yu Jingque many times, and he could almost recite it backwards.

During the training at the police academy, the instructor told them that if they found a secret letter, or suspected that it was a secret letter.

The first key information to look for is the time, address, and person's name.

This is the lowest end, which is clear at a glance.

It's a little harder to find the numbers from it, the numbers in capital letters.

For example, Monday, such as Lao Ba grabbing cigarettes, such as idioms such as three, three, two, two, etc.

One, eight, three, three, two, two, may be hidden time information.

When Yu Jingque trained, he learned almost that.

But will Zhou Jiezhi use such a simple method?

Probably not, after all, it was too simple, and Yu Jingque really didn't use such a method to find the logic in the missing person notice.

Time passed little by little, and at eleven o'clock in the night, Yu Jingque still had no clue.

I have read the missing person notice more than a hundred times, but I am confused.

The anti-Japanese elements were careful, in order to prevent Manchukuo and the Japanese from discovering it, which was fully reflected in this.

It's just that now it's hard to be surprised, and I don't have a clue at all.

It's normal to say, you don't know the password, you don't know the rules, you want to unlock the password, that's really hard.

There may be millions of combinations and variations in this, if you let Yu Jingque try them one by one, maybe Yu Jingque will die of old age first, and he won't find the answer.

What to do?

It's not that Yu Jingque is incompetent, but he has a specialization in the art industry, Yu Jingque has only been superficially exposed to knowledge such as passwords, and he is obviously still a layman.