It turned out that the paper was composed of eight characters with Chinese characters, and it couldn't be connected into a sentence at all, Shen Wanqing said after reading it: "This should be some kind of password, but it's impossible!" ”

Lin Yuan asked, "What's impossible?" ”

Shen Wanqing said: "Deng Shichang is now under house arrest! How could he say that he was also a prisoner, how could the guards of him possibly let him send such a letter? ”

Lin Yuan shook his head and said, "I can't figure it out, let's figure out what is written in the password." ”

Shen Wanqing sighed and said: "This should be a typical displacement password, exchange one word for another, although this encryption method is very simple and can be cracked by frequency analysis, but just a few words, it is impossible to solve it with frequency analysis, without a key, we just can't think of it if we want to break our heads." ”

Key is a cryptographic term, in layman's terms: the rules for converting between cipher and plaintext.

The two of them then found a teahouse, at this time it happened to be when there was no one, the teahouse was very quiet, neither of them spoke, they were thinking of a solution, and suddenly Lin Yuan said: "Do you say this is the password used by the Beiyang Fleet?" ”

Shen Wanqing thought for a while and said, "This is really possible, but where are we going to get the key to the Beiyang Fleet?" ”

Lin Yuan said: "There must be a record of this thing in history, and they won't change the key because we crossed over, but such a rare thing, even if someone studies it, it is impossible for us to find it now." ”

Shen Wanqing said: "If this is the case, we have only one way, to use the computer on the Beijing ship to forcibly calculate all possibilities by exhaustive method!" ”

The two lowered their heads and began to calculate how many possibilities there are, eight positions, there are 3,500 commonly used Chinese characters, exhaustively calculated, it is 3,500 to the eighth power, and the order of magnitude is about 10 to the eighty-third power, this order of magnitude, it is completely possible to exhaustively use a computer.

But the problem is that the computer can list all the results, but the computer does not know that the result is reasonable, that is, it needs a person to see whether the result is reasonable, even if a person can see a result in one second, then it will take at least 10 to the 70th power to read it.

After the two of them finished the calculation, they couldn't help but feel a chill in their hearts, for such a long time, I am afraid that it will be the end of the world.

Shen Wanqing said: "The results of these eight positions are too many to be calculated. Let's think about how to use the key. ”

Suddenly, Lin Yuan slapped his thigh and said: "How can I forget, when we were fighting the Japanese, our early warning aircraft also listened to and recorded the communication between the Beiyang Fleet and Tianjin, we didn't care at the time, now that I think about it, we can completely decipher this code through those materials." ”

Shen Wanqing's eyes lit up and said, "Then don't wait, let's quickly let the Beijing ship decipher." ”

Although the officers and men on the Beijing ship went to the local area to engage in various activities, the ship still reserved sufficient manpower in various parts, and Lin Yuan used a communicator to transmit the news back to the Beijing ship, and the Beijing ship immediately took action, and the previous communication records were not deleted, and even if they were, the computer experts could restore it.

Lin Yuan quickly got the exact meaning of those eight words: Tonight, come to answer.

Both of them were moved in their hearts, which meant that Deng Shichang agreed to let them go together, Shen Wanqing frowned and said, "There shouldn't be any fraud in this, right?" ”

Lin Yuan thought for a while and said, "It shouldn't be, if he wants to catch me, he can do it in the room, why bother so much." ”

When they arrived, the two of them slipped out of the courtyard, the courtyard wall was very low, and the two easily climbed in, and Deng Shichang's house was still lit inside, and they quietly walked in, Deng Shichang saw Lin Yuan, sighed, and said, "Heaven's will!" Providence! ”

Lin Yuan asked, "Deng Guandao, what did you say?" ”

Deng Shichang smiled bitterly: "I think about fighting with the little devil every day to avenge my dead brother, but the saint exiled me here, I saw you today, I feel that the opportunity for revenge has come, but I don't want to betray the saint, so I wrote you a secret letter, if you can decipher the content of the letter, it means that God wants me to go with you, it is really providence." ”

Lin Yuan smiled: "You will be able to take revenge soon." ”

At this moment, I heard a man's voice outside the courtyard say, "Deng Guandao, who is talking in the room?" ”

Before the words fell, I saw that a soldier had already pushed the door in, it was the soldier who asked Lin Yuan a question during the day, Shen Wanqing happened to be standing by the door, after the soldier came in, Shen Wanqing was right behind his side, Shen Wanqing thought to herself: "Let these people who guard Deng Shichang find out, they won't be able to take him away." ”

Thinking of this, his body moved, and a palm knife smashed towards the back of the soldier's neck, Shen Wanqing had practiced this trick countless times, thinking that it would be easy to defeat this little soldier, but he didn't expect that the little soldier flashed over on one side, this palm couldn't help but smash it on the side shelf, the vase on the shelf fell to the ground, and shattered to the ground, and the crisp sound was particularly shocking Shen Wanqing in the quiet night.

The soldier didn't care at all, looked at Lin Yuan, and said, "Hey, aren't you the guest who came during the day?" ”

He turned his head to look at Shen Wanqing again, pointed at Lin Yuan and asked, "Are you his wife?" Then he said with an innocent face, "Why are you beating me?" ”

Shen Wanqing didn't have time to pay attention to these, she didn't even care about the sore hand, she knew that the sound of those vases falling on the ground would definitely alarm the guards in the courtyard next to her, in that case, it would be impossible to take Deng Shichang with her!

But Shen Wanqing knew that the soldier was extremely difficult to deal with, and it was impossible for him to subdue him in one move, at this moment, there was a lot of noise outside the door, more than a dozen soldiers held torches, held Xueliang's single knife, hugged into the courtyard, and surrounded the house tightly, Lin Yuan knew that it was impossible for Lu Dao to escape with Deng Shichang today, seeing Deng Shichang shaking his head and sighing, he knew that he would not be able to escape due to his destiny, and it would not be easy to take him away in the future.

Lin Yuan then arched his hand at Deng Shichang and said: "Deng Guandao, I wanted to visit late at night by the moonlight, but I didn't expect it to alarm all the military masters, so I really didn't want to go, so I said goodbye first." ”

But the soldier stopped Lin Yuan and said, "Mr. Lin, do you want to take Deng Guan out of the city to go around?" ”

Lin Yuan didn't know why he was asking such a question, and before he could answer, he saw the soldier shouting at the soldiers outside the door: "You all come in, pack up your things for Lord Deng, Lord Deng is going to go out with the two distinguished guests to play." ”

The soldiers outside the door seemed to listen to the soldier's words, and came in one after another, and the soldier smiled and said, "Take Lord Deng's books, and," He looked around Deng Shichang and found that he had nothing else but books, so he said: "There are also Lord Deng's books, all of them are packed into boxes and carried by Lord Deng!" ”

Then the soldier pointed to Lin Yuan at the door and said with a smile: "Mr. Lin, let's accompany Master Deng out to play." ”