Chapter 553: 1st generation **** machine Enig 2

"But this method is not very safe. Although there are many cases of 17,576, if the other party can obtain a cipher machine and use enumeration to decipher it, adjust the rotor to a certain position and enter the ciphertext. , And see if the text is meaningful. This can still be cracked theoretically, and if the other party has multiple such machines, the cracking efficiency will be greatly accelerated.” Shilifen put forward his own views.

"Isn't this smart? Considering the issue of the opponent's access to passwords or cryptographic equipment, how come in World War I, the Russians had obtained the codebook of the German High Seas Fleet at the beginning, but in the end the German Navy did not know to change it or How about getting a new set of passwords?" The prince murmured frantically in his heart. It seems that there is still a big gap between recognizing and doing things!

"If you add a rotor, you can also solve this problem, but what we need is a more convenient decoding device, not a huge and expensive machine, the cost and volume must be moderate." Schlieffen continued.

"What you said is very reasonable. We have tried. If the other party uses our machine to crack with enumeration, it takes about two weeks of griffon 24 hours a day. So for this, we also set up two other Security measures are adopted to increase the difficulty of cracking. For example, these three rotors can be disassembled, and their positions and numbers can be adjusted. This makes the difficulty of cracking increased by 6 times! And this is not over, we still An adjustable wire is added inside the machine. This wire can connect letters. For example, we connect a and d. When we type a, it actually becomes d before entering the rotor. Then it is encrypted by the rotor, and vice versa. When we type d, it will be encrypted once to become a, and then change with the rotor. After these two steps, the encrypted ciphertext can hardly be violently used. Crack!" Arthur said with a smile.

The replacement of the positions of the three rotors is limited to the increase in the difficulty of password cracking, but the replacement between 26 letters definitely increases the difficulty of cracking to a terrifying level! Just add a few lines, and the number of cracking party experiments can be increased to more than 100 million times! Coupled with unrepeated telegrams, this kind of cipher is indeed impossible to break in theory, at least from the perspective of the Prussians! "We finally solved the problem of confidentiality of the telegram once and for all." A Prussian officer exclaimed.

"No, this encryption method can be cracked! Because our enemies may obtain this cryptographic machine, such as from our internal traitors, such as from the battlefield, as long as they obtain a cryptographic machine, then they will It can be copied, then our rotor encryption becomes useless, and as long as they can get the key of the day and know the position of the rotor, then it is possible to crack the content, although replacing the letters makes it difficult to decipher theoretically. , But they can still guess that they can’t completely crack the connection in time, and it’s still possible to get general information!” Just as the Prussian military was full of praise for this cryptographic machine, Ruprecht said something to them More shocking words!

"It is true that the key is changed every day, but the order of the wiring and the arrangement of the rotor is agreed in advance, and the only thing that can be changed randomly is the corresponding order of the rotor! This is the six before each report. Letters, the first letter and the fourth letter are all replaced by a plaintext, and if a sophisticated mathematician can obtain this cryptographic machine and use this substitution, then there will be a chance to crack it. In the end, in the eyes of these people, the key of the day has become a loop of different lengths, and this loop is determined by the position of the rotor and the initial direction, which excludes the most connection method!"

"Yes, although there are still many situations in this experiment, it makes it possible to crack the entire intelligence after all. If the other party copies a lot of cipher machines, then they still have the possibility of cracking." Arthur also agreed. After all, the traverser With rich experience in later generations, people know how this dumb machine was cracked in history! "In order to prevent the other party from using the same means to encrypt, we also designed a mechanical decoding machine. As long as there is a similar cipher machine, and with this decoding machine, we can experiment with the three rotors of the day within 2 hours. The key of the cipher machine! So, I don’t think there is an unbreakable password in this world!"

The cracking machine Arthur said was the "bomb" machine used by Poles in history when they started cracking the puzzle machine. In fact, the Enigma cipher machine was cracked before the outbreak of World War II. That was because the number of rotors was small , And caused by the habit of the transmitter itself. Although the "bomb" machine provides some ideas, it is still a long way from the machine that can actually crack more rotors and the cipher machine that can be reversed. In history, the later cracking of the Allied forces also relied on guessing or even taking actions to deceive. Information to analyze the password. The German Navy’s cipher machine took even more time to crack. Only after obtaining a completed navy cipher machine can it be effectively cracked~www.wuxiaspot.com~ So, according to the words of the prince, the Enigger cipher machine is OK It takes a lot of manpower and material resources to crack. After all, you know that the method is still a long way from cracking. At least in the first battle environment, if you are more careful, the Enigma cipher is still almost unsolvable, because at the beginning The Polish mathematicians who discovered the Enigma cipher machine have not yet been born, and even before the end of World War I, they were still German... And if the prince can wear the crown on this plane, Poland will definitely not exist. Therefore, in the next 20 years, the military multi-rotor Enigger cipher machine is still safe!

"In other words, we have a relatively reliable encryption method, and at the same time, in order to keep secrets, we must also step up internal management. Even before the final battle begins, we cannot promote this epoch-making equipment. Is that right?" Xiao Maoqi asked.

"Yes, any equipment has a shelf life. As time goes by, the other party can always find weaknesses and problems in it! So in order to make our military communications absolutely safe, we need to keep the secret of this machine first!" The prince nodded and said.

As a result, the German military began to secretly replace its own cryptographic system. Before the outbreak of the First World War, the German navy, army and its aviation forces had prepared enough Enigma machines and technical personnel before the war, and when the war suddenly came At the time, Britain and France discovered that their espionage system tended to collapse within a day. Of course, this is a later story and will not be mentioned.

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