"Okay, Brother Yi!" Xia Zhihao nodded.
"You continue to keep an eye on this group of people. If Yang Xinlu goes to a certain place again, you must monitor her!" Qin Yi ordered.
"I see!"
When he returned to his residence, Qin Yi took the USB flash drive in his hand and started to connect to the computer. First, he read some of the contents of the network messages.
I read it again and found no problems!
I watched it several times, even late at night, but I still didn't find anything suspicious.
Generally speaking, communication in words and content is the easiest to leave evidence, so in Qin Yi's subconscious, these spies should not use words to convey information.
Of course, this is just a guess. No one knows whether the spies will hide some transmission passwords in the text.
Over the past few years, Qin Yi has had nothing to do. From time to time, he read some books and information about investigative methods, and learned a lot of skills.
"Forget it, it's too late. We'll study the audio of the call tomorrow."
Wash and sleep.
The next day was another busy day.
After finishing his work, he returned to his residence at night and Qin Yi continued to study other call records.
"Carlsberg wants another batch, yes! It's best to deliver it tomorrow!"
"You guys will send me ten catties, yes, only ten catties..."
"Landlord, can you postpone the rent for another month? It's hard to do business now..."
Qin Yi frowned as he listened to the communication content of the tavern owner.
He listened to it several times and still didn't find any big problems!
Then he listened to the communication content of the owner of Linzhong Bookstore.
"Old Liu, I really can't borrow money from you! I'm running this small bookstore now. I really can't make much money. If I hadn't written novels part-time, I wouldn't be able to support myself. !”
"I really didn't lie to you!"
"It's not that my brother can't do it, but I really don't have the money..."
…
"Mom, I don't have time to go home now, right, you guys..."
Qin Yi listened to the conversation and found that there was nothing wrong with the owner of Linzhong Bookstore. Most of his communications were about common topics, either looking for someone to drink or where to go to play.
Qin Yi listened to it several times, and more than an hour passed like this.
"No, there seems to be something wrong with this passage!"
Qin Yi turned over the contents of another paragraph again.
It was the phone call that asked Lao Liu to borrow money from him.
This phone call lasted ten minutes.
"music?!"
"Music for the piano!"
In the content of this call, in addition to the sound of the bookstore owner talking to that old Liu, there is also the sound of piano playing, and the sound of piano playing should be from the bookstore owner's side.
Moreover, the sound of the piano playing does not seem to be piano music played, but the sound of someone playing the piano next to him in real time, practicing the piano intermittently.
"Listening to this rhythm, one of the sections feels a bit like a three-point code!" Qin Yi thought to himself.
Then he listened to it several times, and suddenly his eyes lit up!
"That's right! It should be the three-point code! Use the sound of the piano to play the three-point code to convey information?"
And this is a mutated version of the three-point code, which means that on the basis of the three-point secret, certain new additions and cover-ups have been made.
He is a master!
Definitely a master!
What is the three-point code?
It’s actually similar to Morse code!
Use this special sound to convey your message!
Information can be conveyed using sound, or the flashing frequency of lights, etc.
For example, Morse code, quadrilateral cipher, Hill cipher, Polefield cipher, affine cipher, three-point cipher, etc.
The three-part cipher was invented by FeliX DelaStelle (he also invented the four-part cipher and the two-part cipher). The binary cipher is two-dimensional and uses a 5×5 (or 6×6) matrix for encryption, but the three-part cipher uses a 3×3×3 matrix. It is the first three-letter substitution cipher to be applied.
In addition to learning Morse code over the years, Qin Yi has also learned the above codes, and has even done in-depth research on the derivation and mutation of secrets.
There is no way. With his photographic memory, ability to draw inferences and draw inferences from one instance, he has a natural advantage in learning this kind of thing.
So when he had nothing to do, he would learn these skills.
Mainly, sometimes it might be helpful in solving crimes and investigating crimes, so he learned it, such as the psychological techniques he had learned before.
"Translate and see what's going on!"
Qin Yi immediately took out the paper and began to translate.
Half an hour passed.
"No! It's a three-point code, but an improved one!"
"It still needs further research!"
In a blink of an eye, three days passed.
Qin Yi spent three days and finally deciphered it!
One of the piano sounds is composed of a three-part code!
The content is: Feng Chengjun has confirmed that he will be promoted to the next step next year and enter the absolute top level. After discussion with us, No. 9 decided unanimously that in order for No. 9 to further gain Feng Chengjun's trust, No. 9 planned to give birth to a child for Feng Chengjun!
Looking at the translated content, Qin Yi suddenly became happy!
really!
The owner of Linzhong Bookstore is indeed Yang Xinlu's accomplice! He is also one of the spies, specifically responsible for conveying information to Yang Xinlu.
No wonder Xia Zhihao and the others were monitoring Yang Xinlu during this period, but they didn't find any action by Yang Xinlu to convey information. It seemed that when Yang Xinlu wanted to convey information, she went directly to the bookstore owner in person and told him to let the bookstore owner pass it on!
In this way, it is safer!
And Qin Yi guessed that No. 9 must be Yang Xinlu! Yang Xinlu is No. 9!
Because according to the content, Feng Chengjun is going to give birth to a child, so it must be her.
In her previous life, Yang Xinlu did give birth to an illegitimate daughter to Feng Chengjun.
All of this is right!
"So, who is Mr. Liu?" Qin Yi narrowed his eyes.
He must be one of his accomplices!
Qin Yi immediately investigated the other party's number.
Half an hour later.
"It seems that this old Liu is not in Shanhai Province! Out of town? And it seems that this old Liu may not have finally come online, maybe he will go online again! Let me make a malicious guess, maybe this old Liu is one of the intelligence relay stations! This old Liu How many spies are you responsible for offline?" Qin Yi secretly wondered in his mind.
Now his idea is that since this evidence has been confirmed, it is best to find out this old Liu!
Moreover, now that it is confirmed that the bookstore owner is also a spy, we can start an in-depth investigation.
But now it seems that we still don’t know how many accomplices Yang Xinlu has. Once the investigation is in-depth, will it be possible to alert the snake?
Once exposed, this Lao Liu, or even Lao Liu's online line will be directly disconnected, which is another huge loss!
