Spy Wars: The Little Spy Strikes Back

"Everyone, what do you think?" asked Shancun Yefu.

No one spoke for a moment.

"Either someone from the Communist Party or someone from the Military Control Commission." Shuimen Lingzhi made a simple analysis.

"What kind of information can the outside world send? Can it only mean that Bingshuang, Qinglong or Baihu are still in the bureau?" Shancun Yefu has been thinking about it for a long time.

"There hasn't been any intelligence recently. There was only the Yichang battle before." Qin Tian said to distract everyone's attention.

"No, there is one." Gao Bing quickly recalled: "Didn't we just arrest a communist? He has information."

Gao Bing was smart and pointed it out in one sentence.

Qin Tian was stunned and realized that he had made a mistake.

"Yeah." Minato Lingzhi also slapped his thigh.

"But many people know about this." Qin Tian said.

"Not many, just us, plus Captain Sakai and the people from the large-scale interrogation team, and the people who are deciphering the code now," said Yamamura Nofu.

Qin Tian breathed a sigh of relief. Fortunately, many people knew about it, so they couldn't all suspect him all at once.

Just as Shancun Yefu was looking at everyone with suspicion, someone knocked on the door.

"Please come in."

The person who came in was the chief of the decryption department, the person in charge, a Japanese woman named Kobayashi Yoshiko.

Yoshiko Kobayashi graduated from the Department of Cryptography and Decryption at Kyoto University, a university with excellent academic research.

Kobayashi Yoshiko is researching a cryptographic hash value based on a hash function, which is usually a 16-bit hexadecimal number.

This technology was developed into 32-bit hexadecimal bits in the future, which is the future MD16 encryption algorithm.

"Oh, classmate Yoshiko, please sit down." Yamamura Nofu stood up and greeted Kobayashi Yoshiko.

This attitude makes it seem as if Kobayashi Yoshiko is his superior.

"Everyone, let me introduce to you a graduate student from Kyoto University, a top expert in Japan's encryption and decryption. He is only temporarily in Ice City, and will go to South City later to set up a professional encryption and decryption team and lead the entire Japanese military intelligence department's encryption work in China." Yamamura Nofu's introduction was very high-end.

He is indeed a high-end talent.

"Hello, everyone." Kobayashi Yoshiko greeted in a friendly manner in Japanese.

This woman is dignified and elegant, like a new-age Japanese professional woman.

"I'm here to report on the progress of deciphering the last intelligence." Kobayashi Yoshiko replied.

"Has it been cracked?" Shancun Yefu said expectantly.

"Sorry, it hasn't been cracked yet." Kobayashi Yoshiko answered directly.

Everyone was surprised.

"Have you encountered any difficulties? Is it because there are not enough samples in the code book?" Shancun Yefu asked without any blaming.

"First of all, this is not the encryption method of the code book." Kobayashi Yoshiko immediately denied it.

"Oh? How did you rule it out?"

Qin Tian was surprised.

Because for the Communist Party, the use of code books is the most common, universal, simplest and most effective method of intelligence encryption.

"The reason is simple. The encryption method of the code book outputs ciphertext in numbers. Of course, the enemy can also use the method of mapping letters and numbers, but generally it is all numbers or all letters. Secondly, the special nature of the code book rarely uses a few special numbers, such as starting with 0, or 1, or high-value numbers, 999, etc. These have patterns to be found."

"But none of the password strings match this. After ruling out the encryption of the codebook, our workload was greatly reduced. We divided the work and cracked it, from single-table replacement, multi-table replacement, displacement replacement, transposition replacement, double-letter replacement, etc., all of which were cracked. In the end, we believed that this was a function encryption."

Kobayashi Yoshiko explained very professionally.

"Function encryption? What does that mean?" asked Shancun Yefu.

In these areas, everyone is a layman.

"The receiving party needs to encrypt the function agreed upon by both parties, which is y=f(x). We need to know both the equation of f(x) and x, where x is the ciphertext array." Kobayashi Yoshiko replied.

"Can it be deciphered?" Gao Bing asked.

"It's difficult. But we will try our best." Kobayashi Yoshiko was both excited and frustrated because she encountered challenges as soon as she arrived in China.

"It looks like we're going to have to interrogate him. The telegraph operator might know the encryption method, or the person who gave him the ciphertext might know the encryption method," said Yamamura Nofu.

"Okay, then I'll get busy." Kobayashi Yoshiko went out.

"Wait." Gao Bing stopped and asked, "Why did the enemy use such a complex and one-way encryption method?"

"The higher the encryption complexity, the more top-secret the intelligence is, and the higher its value and urgency. I am sure that this is a very important top-secret intelligence." Kobayashi Yoshiko concluded.

This surprised everyone.

A small peripheral telegraph operator accidentally discovered by the mopping-up team unexpectedly obtained top-secret intelligence by accident.

"Thank you for your hard work, Xiaolin. Please." Shancun Yefu nodded and said yes.

Kobayashi Yoshiko went out to do some work.

"Let's interrogate him again and isolate him. Only me, Gao Bing, Qin Tian, ​​and Shuimen Lingzhi have the right to interrogate him. No one else is allowed to approach him privately." Shancun Yefu felt that the secret code had been leaked, so the lurker could no longer be allowed to approach the telegraph operator.

Shancun Yefu also felt that he had made a mistake by not taking the matter seriously enough.

"Okay, let's start the interrogation now." Minato Lingzhi said.

Soon we arrived at the dungeon.

The guards were sent away, and the prisoner was tied to a chair. It was already a good treatment for him to be able to sit.

Qin Tian looked at this man, who was dying. He had been tortured by the mopping-up team before being transferred here.

"Friends, we already know that this is top secret information." Minato Lingzhi started.

The telegraph operator raised his head, glanced at everyone, and said: "It's not that I don't want to tell you, but I'm just a telegraph operator. I don't know the content of the information and the encryption method. I can't answer you."

"We don't want to ask you about the encryption. We want to know your superior, or who gave you the information?" asked Shancun Yefu.

"It's useless for me to say anything, because he has already died." The telegraph operator's eyes were visibly red when he talked about the sacrifice.

It can be seen that he did not lie.

Qin Tian also felt a pang in his heart, thinking that this lurker must have sacrificed himself because of this information.

That's someone like me.

"There must be a code name, right? Or what is your code name?" Qin Tian asked.

All you need to do is know the code name and send it to Yan'an, and Yan'an will be able to synchronize the information and quickly decipher the intelligence.

"I'm just a small fry, without a code name," the other party replied.

"Real name." Qin Tian asked again.

The other party still did not answer.

"You don't want your team to not even know your name when you die, right?" Minato Lingzhi stepped forward and asked.

The other party still didn't say anything.

"Go to jail."

Said Shancun Yefu.

Minato Lingzhi found five nails and a hammer from a pile of torture tools.

Minato Lexus walked up to the prisoner and fiddled with it.

"If you don't tell me, I'm going to torture you." Minato Lingzhi said coldly.

"Please, let me go, my rank is really too low. If I knew, I would tell you everything. I really don't know, there is nothing I can do." The telegraph operator cried.

"Who would believe that? The information you are sending is top secret. Even if you are a telegraph operator, your rank will not be low. If you don't tell me, I will take action." Minato Lingzhi squatted down.

He aimed the nail at the opponent's instep, raised the hammer and glanced at the telegraph operator.