To Four Thousand Years Later

To be more complicated? "Leonardo paused after hearing the words: "Do you know that the four holy limbs of the Order of the Rosary do not match their records? "

"No, I don't know about it.

Baimon replied plainly: "So far, I don't know what the correct answer is...but I felt your Majesty's doubts at that time. This must be because the love you received from me and yourself passed through some channel The facts obtained do not match.

"So I became a little vigilant. I searched again. All the information that appeared in the same book as the records of the Order of the Roses. Then use this as key knowledge, and use the information that has a high repetition rate and is unknown to the public Partial inspection... found the 'correct handwriting'" that is, the handwriting of those who belonged to the order of the Rosary and were responsible for writing the books. Sitting next to Leonardo, he opened the Book of Raziel that he carried with him. This book is not only a recorder who knows everything in this world... It can also be used as an endless notebook. Bai Wei opened the page, and what was displayed inside was his own statistics. Here, the general knowledge of mathematics written by Charles in the book was used, and it was densely written on the two pages spread out.

He casually flicked his long hair that was hanging down on the paper because he bowed his head, and pointed out one of the lines to Leonardo: "Their main job should be to copy books, or collect books and information from the outside world." Books. Because the number of books they write every year is too large...these few people have four books. But these people have seven or eight books a year, and this person has written eleven books a year.

"The vast majority of these books have similar books from the same period or even earlier periods, and the content is similar. So this is definitely not their own... and the 5th thing is that these books they wrote less or re-written, None of them are duplicates. Then I can think that they should be the same group, or at least related to each other. Baimen whispered, flipping through the books with a very serious expression: and then this is the same group as Yass The peace of mind when Talu is quiet, the naturalness when chatting with Baal, and the joy when he is in trouble with Ashzende are completely different emotions. If Yastaru is like a wife, Baal is like a good friend of the same **** , and Aszend is a young and beautiful opposite sex, Baimon is closer to the deskmate who does homework together—although he is a good friend of the same sex, and Baal's figure is even the best. Notice Leonor He was distracted for a moment. Baimon's voice rose slightly, calling his attention back. Baimon nodded slightly, pointed to the beginning of a certain page, and handed the book of Raziel to Leonardo: "Look, it started in March of this year. The workload of these recorders. Suddenly it all started to diminish. And these few people suddenly cut off the record.

Correspondingly, some unexplained book records appeared. It doesn't belong to any language and doesn't seem to have a well-formed grammar. But it can be seen that their handwriting is exactly the same as those of the previous people.

"After that, the number of ordinary books written by these recorders of the Church of the Rose will decrease every year. And the number of books written in this ciphertext will increase... and eventually return to the original level again.

Baimon said in a low voice: "After that, the Order of the Roses wrote some documents and announcements in ordinary language every year. But each document will be followed by another letter encrypted in ciphertext... Sometimes The cipher text is written first, and the white text is written later. These "normal documents" can be retained in the end, but the cipher text is passed on and destroyed.

"So I infer that the Order of the Rose must have invented a new encryption method. All records, letters, and confidential documents are encrypted by this method. And this purpose...maybe it is to prevent my surveillance. Bye Mu's expression was very serious.

His Book of Raziel has the backup of all records in this world. But it does not point out the real name of the writer, only information about whether it survives, when it was born, and when it was destroyed.

He raised his head, stared at Leonardo, and said softly seriously: "If we say that they use this method to prevent information from leaking, they don't even type a draft. This is unreasonable.

"It's not about writing a draft first and destroying it afterwards. It's about not typing it from the beginning." Leonardo nodded, "Indeed, this is very unnatural. It will also affect the efficiency of encryption and decryption work, and even make mistakes.

But this should also explain that the method of encryption and decryption is very simple, right? He hasn't said it yet, but Baimon has already understood what he meant.

"I've tried it. It's not a substitution cipher. The letter frequency analysis method is completely ineffective. Baimon shook his head: "In fact, that's why I came here. I need your help, Your Majesty, as early as hundreds of years ago, the encyclopedia compiled by Zhi Liman, in the book "Mathematics", contained the method of deciphering the simple substitution code using the letter frequency car statistics method.

"In the past three months, I have tried more than 283,000 possibilities with exhaustive methods, but I still can't crack their encryption method. But fortunately, I at least know the principle. How do you Did it?"

When Leonardo heard the possibility of exhaustion, he was already dumbfounded.

He suddenly became a little interested in this: "Quick, tell me. I'm a little interested.

"Because I'm just deciphering a name repeatedly.

Baimon replied: "The document I deciphered by the exhaustive method was the information sent out during a gathering four years ago. The reason why I chose it was because I caught this person back then... I know this person's code name. But Even so, I still can't find the law of deciphering. He is completely out of order. Baimon brushed his hair that was hanging down again, and replied peacefully: "He is still locked in Shenli...and he is not very loyal. people. I got information from him.

While I can't fix the problem, I can fix the person who asked it.

Baimeng is really looking more and more like Yastaru.

Leonardo thought for a while, but didn't dare to ask in detail, he just said, "What's the principle?" Baymon pondered for a while, as if he was thinking about how to explain it to Leonardo. He said slowly: "This is a machine invented by the Order of the Rose. It is called the oracle. It is operated by steam... It is a fully automatic cipher machine. Press one key and another key will pop up. And this The great thing about this kind of cipher machine is that even if you get a completely identical cipher machine, you still cannot crack its cipher.

"There are four compasses on this cipher machine, corresponding to the four sacred limbs of the Order of the Rosary. They must be inserted into the correct slots in the correct position, and then rotated to the correct position. Each" and each press One key, and the compass automatically turns the position of one letter. And after the first compass circle. The second compass will turn one notch. That is to say, each letter corresponds to another position, and the correspondence of the second letter changes again.

"It doesn't push all the digits back or advance a few digits, but changes the corresponding relationship between each key and each key. This leads to the fact that the original technique A pops up D, then pressing D will pop up instead of This is also what the deciphering party has to do—he only needs to type the letter again on the oracle to get the correct information.

"If there is only one compass, it will rotate after twelve consecutive inputs; but this machine stays in place. After I got this machine and four compasses, it took another half a week to successfully decrypt it. I found the initial position of the compass for that letter...that is, the names of four people.

But I later found out that this code can only be used for a small number of letters from this person. The books he wrote, some documents are not applicable, not to mention other people's passwords. "

Baimon said in a low voice: "Your Majesty, we need your wisdom to break the encryption of this oracle...Although I know this request is too rude and Leonardo has listened in a daze. This is not... Enigma cipher machine?