C1361 Top secret of the CIA (1/2)

codebook! It was one of the core secrets of the Chinese CIA. With it, France would be able to easily eavesdrop on all the Chinese military intelligence and successfully translate it.

The early telegraphic technique were very primitive. This kind of completely open source electrical signal was actually very easy to listen in on. Humans actually borrow the speed of electricity and design a simple closed system to complete the transmission of information.

Beijing, who was thousands of miles away, sent an electric signal to the telegraph network and instantly, the telegraph of Ryukyu received the signal and recorded it down. At this time, if there was anyone on duty in front of the telegraph of Ryukyu, he would start to record these codes with different lengths.

This was the most primitive method of manpower. In the future, when there was a further step in technology, there would be an automatic transceiver. The receiver would be able to record electrical signals from afar even without 24 hours of guarding.

This pattern was fast, but there was a big problem with its efficiency. That was, the openness of the telegraph network s posed a huge threat to the secrecy process.

In reality, there was no way a telegraph line could only have two connections, Beijing and Ryukyu, what about a half-way Deer Island? Where's Tianjin? And the Tanggu? What about Shanghai Jiangning? There were also countless transceivers waiting for these signals.

In other words, when the signal was generated in Beijing, all the nodes in the entire telegraph network chain would be able to receive this signal, unless you cut it off physically.

As for the civilian and commercial telegrams that didn't require a high level of secrecy, this problem could be solved by performing the code at the beginning of the electric signal. Every region, every telegraph had their own code.

However, the problem of telegraph messages being used for military purposes was much more serious. The strong ones all had their own intelligence personnel s, they would monitor the electrical signals sent by important targets 24 hours a day, and would definitely not miss a single one.

As soon as the military telegram from Beijing was sent out, there would be more than a dozen spy interfaces on the line, recording the varying rhythms of these electrical signals.

The civil code book was open to all, and everyone could translate the rhythmic beeping sounds of the translations into the human language.

This kind of openness could not be tolerated by the military or intelligence personnel. In order to keep the existence of the codebook s that were highly confidential, every country, even every system would develop their own codebook.

Beep, beep... Beep... What did two short and one long signal rhythm represent? Russia had its own secrets, Britain had its own English translator, France had its own comparison table, and the Chinese had their own codebook.

The rhythm of the signal was completely different for codebook from different countries. This caused the other party to have difficulty deciphering it.

Overall, the more complex and scientific the codebook's plan was, the more confidential it would be. According to the statistics of the CIA, the current level of coding in Sha Russia was the lowest. They just marked different Russian characters with different electrical signals.

To outsiders, this kind of telegraph was obviously unintelligible, but to those elite warriors who had been influenced by Xiao Letian's new intelligence, this kind of secrecy was extremely primitive and lagging behind.

There are a total of 33 letters in the Russian alphabet, and at first we did not understand what each electrical signal represented, but don't forget that the Chinese intelligence officer knew how to eliminate them.

First, they allowed the spies to get close to some low-level telegrams by hand. If they could decipher a letter, they would have to decipher one letter at a time. As the number of letters they deciphered increased, the telegrams would gradually reveal themselves.

After almost two years of settling down, the CIA had already grasped the three sets of code compilation forms for Sha Russia. The embassy in Sha Russia in Beijing was now transparent to the Chinese race, which was the key factor for why Xiao Letian was able to grasp all the information in the Expeditionary forces.