This major course alone is divided into eighteen, nine, and nearly twenty subjects, including agent theory, investigation theory, counter-reconnaissance theory, strategy customization, on-site investigation science, tactical execution, command thinking, etc. There's a whole lot more. Those who took classes with him were all elite German agents, and they were just learning one course. Fan Keqin has dabbled in all three major courses, and his grades are pretty good, which is already very impressive. For example, the University of Pennsylvania in this era now has a professional course in cryptography that is cooperating with the U.S. Office of War Information. However, you have to study this course for at least three years to graduate.
There is no problem for Fan Keqin to write a set of his own passwords, but to crack it, even an agent who specializes in these is extremely laborious, which requires a lot of verification and comparison rules. If someone creates a set of words that look like ghost drawings, it is basically impossible to crack them as long as they don't say anything.
As for the current set of passwords, Fan Keqin didn't know whether the guy named Okubo Takayun made it up himself, or whether it existed in the first place. It would be troublesome if he made it up himself. Only the other person in the world knows what it means.
On the second day, Fan Keqin washed up and had a meal in the cafeteria, and it was almost time to go to work. Carrying the suitcase containing the transmitter and the code book, he went directly upstairs and found Qian Jinxun.
Fan Keqin put the suitcase on the other party's desk and asked, "How are you? Have you sobered up?"
Qian Jinxun was happy and said: "I'm not even drunk at all. Don't you know how good I am?" After saying this, he raised his head towards the suitcase and said: "What is it? Are you bribing me?"
"That's right." Fan Keqin replied: "Bribery and bribe you." As he said that, he reached out and opened the suitcase, revealing the transmitter inside, and continued: "Take a look, this is the Japanese spy radio station we captured. The overall size is about the same as an ordinary radio station, but it is well disguised.”
"Isn't this a camera?" Qian Jinxun saw it and picked up the thing that looked like a camera in surprise. As soon as he picked it up, he felt something was wrong and continued: "So heavy?"
Fan Keqin unscrewed the pens and connected the entire radio station one by one with the wiring inside. Finally, he pulled out the antenna from the retractable tripod and plugged it into the interface of the radio station. He said, "Did you see that? Even you were deceived. Yes, this thing is disguised quite well."
Qian Jinxun was very happy. After all, it was a great achievement to capture the enemy's radio station. He asked: "Where is the code book?"
Fan Keqin handed a brief history titled "Sui and Tang Dynasties" to Qian Jinxun, then placed a notebook on the table and said: "The mission of this guy Yamaguchi Yoshimune is to detect the specific location and official residence of our country's senior officials. , office, etc., so he conducted investigations as a rickshaw driver in Huangshan District. After getting the specific results, he will use this Sui and Tang Dynasty to send messages."
Then he pointed to another notebook and said: "Yoshimune Yamaguchi's commander, Okubo Takayun, wrote him a message in these words before he sent him here, but the content of this message was encrypted, and Yamaguchi Yoshimune himself did not." I don’t know what it means. Okubo Takayun said that before he was asked to evacuate Chongqing, he published this piece of information in the New Evening News. Doesn’t the newspaper have a small section for decryption, mathematical games, etc. It was published in this section. But As I said just now, it’s still unclear what this thing means.”
Fan Keqin lit a cigarette and continued: "This guy Yamaguchi remembered it after reading it, and Okubo Takayun destroyed the text. This time we interrogated him, and he wrote the message silently. After repeated interrogation, no It seemed like it was made up right now. It was correct both times. And he also promised that he would remember it correctly."
After hearing this, Qian Jinxun grabbed the notebook and said, "Did he write this down silently?"
Fan Keqin said: "Yes, that's it."
Qian Jinxun looked at it in detail and said: "It's a bit like a math problem, but these symbols inside, stars, triangles, and things like flowers, what are they? You can't understand them?"
Fan Keqin said: "I don't understand. I'll ask Section Chief Han later. He majored in telecommunications and may also be able to decipher."
Qian Jinxun picked up the phone and said, "I'll ask him to come over." He then dialed and after a while, he said, "Hey, Lao Han, come to my office and let you see something... um .”
After putting down the phone, he lit a cigarette himself. After a few puffs, Kong Xinran's voice sounded on the buzzer, saying that Han Qiang had arrived at the door, and Qian Jinxun immediately let him in.
Han Qiang pushed the door open, looked at it, and said, "Keqin is here too."
Fan Keqin pointed to the things on the table and said, "Take a look."
Qian Jinxun also said: "The spy radio station, the code book, and an encrypted message were just seized. You are an expert in this field. Let's see what's going on."
"Well, I'll take a look and talk about it." After agreeing, Han Qiang read all these things and said, "I don't need to talk about this radio station. It's the same as ordinary radio stations, but it looks a little weird. , very confusing. I have seen similar ones that are much better than this one. I was still studying at that time, and my teacher took me to a wine cellar, pulled out the cork in public, and poured out the red wine. Then he used a transmitter to connect to a place below that looked like a bug's eye. When he said it, I realized that it was actually a radio station. The oak barrel has two layers, the top part actually contains wine, and the lower part contains the radio station. "
Following him, he tapped the "Sui and Tang Dynasty" with his hand and said: "This book is not thick, with less than 100,000 words in total, but it contains a lot of ancient words, so there are more rare words, so even if he is Even some weird words can be found in it. This book is used as a code book, and the choice is really good."
Fan Keqin and Qian Jinxun were most concerned about that small piece of information, so they pointed at the notebook and said almost in unison: "Where is this?"
Han Qiang shook his head simply and said: "I don't know. It's like a ghost painting. Who knows what it is. But judging from the order of their arrangement, it should be a paragraph, and the specific content... If you don't know what this password is based on, It’s written, so it’s basically impossible to decipher it, unless you’re lucky.”
Now that the case is almost over, all those who should be arrested have been arrested, so there is no need to keep secrets from Han Qiang, so he briefly introduced some of the ins and outs to him. Fan Keqin finally said: "Let's try to analyze it... "
