"Let's go to the library today, crack it again, maybe add the classical code, there will be some progress?"

"Hmmm......"

Wang Feng nodded on the surface, in fact, he didn't want to go to the library anymore, this code has not been cracked by thieves all over the world, including the K-shaped family that has been at the top of their fame recently, and their powerful brains have not analyzed anything famous, so he doesn't think that relying on just two of them will do.

On the carriage, Wang Feng memorized the key sentences of the classical code while memorizing, and found that Shenlong Qi was driving the 'Ei' vortex to rotate slowly:

"In the final analysis, there are two main encoding methods for classical cryptography, namely substitution and substitution. If the letters in the plaintext are rearranged so that the letters themselves remain the same, but their positions change, the resulting password is called a displacement password. The simplest way to replace a cipher is to reverse the alphabetical order in plaintext and then truncate it into a fixed-length group of letters as ciphertext. Substitution of password is to replace the characters in the plaintext with other characters......"

"Replacement? Substitution? Isn't the substitution the Hill cipher? ”

"Construct multiple ciphertext alphabets, and use a series of substitution tables to replace the letter sequence of plaintext messages in turn under the control of the key. Well-known multi-table substitution ciphers include Vigene ciphers, etc. ”

Caesar's shift cipher is an alternative cipher that originated in ancient Rome, and Caesar is described in the Gallic Wars as having used it to convey information. Caesar's shift cipher works by pushing the letters back to 3 digits in order, e.g. replacing the letter A with the letter D and the letter B with the letter E.

The cryptography of Caesar's shift cipher is broadly divided into two types: translocation and substitution, and there are more complex methods that combine the two. In translocation, the letters do not change, and the position changes; The letter in the substitution changes, and the position remains the same.

The first document to use the replacement cipher for military purposes was Caesar's Book of Gaul, which describes how Caesar sent secret messages to Cicero, who was under siege and on the verge of surrender, in which the Roman alphabet was replaced with the Greek alphabet so that the enemy could not read the message at all.

In his biography of Caesar in the second century C.E., Sutonius gives a detailed account of one of the alternative ciphers used by Caesar. Caesar simply replaced each letter of the message with the third letter of the alphabet after that letter, and this code replacement is often called the Caesar shift code.

The whole code process is: "2 凵 l コ Her-Nizzy a:·-·-·· --·-----·---··· ----··· -··· --·--·--··· ------···· --··· ---·· --·-”

"First use the classical cipher, turn it upside down, and become-·---·· ---··· --···· ------··· --·--·--··· -··· ----··· ---·-----·--·· -·-·53:azini-he-コI凵2"

Qin Han muttered.

Ziny He...... What a familiar word...... Ziney -...... Oh! Zieni Her's Navajo Code means "Axe"! ”

Wang Feng slapped his thigh and shouted, then bared his teeth in pain.

"Axes? Wang Feng, your memory is really strong, yesterday we just learned about the Navajo Invincible Code, but I didn't expect you to memorize some. ”

"Hehe, it's just luck."

"But this [axe] ...... Perhaps, we mistranslated it again..."

"I hope not..."

"After the inversion, wait, Wang Feng, you memorized the form of Morse code, right?"

"Remember! And the back is like a stream. Let me translate this paragraph. Wang Feng suddenly discovered that Qin Han is so smart, her IQ is definitely not below herself, but she is too kind, she almost starved to death on the street a few years ago, and she would rather suffer herself than be burdened by others.

"The first translation in English was Y...... Then E, J, I, A, B, A, O, Z, A, N, G......"

Qin Han listened carefully to the English he analyzed, and Wang Feng's gaze was nostalgic for Qin Han's white and tender face.

She didn't move away for a long time, the breeze blew, and the breeze brought by the carriage ran to lift her beautiful hair, Wang Feng was stunned for a while, Qin Han is so beautiful, she is really a blessing that has been cultivated for eight lifetimes, this is not in the eyes of a lover, she is so perfect.

"Hurry, translate, I can't wait! Fast! ……”

Qin Han's eager cry interrupted Wang Feng's train of thought, and he came back to his senses: "I'm sorry to be distracted." ”

She saw Wang Feng swallowing his saliva, and then thought about it before he had been looking at her, his cheeks were pink, and he lowered his head: "I have time to look at me slowly in the future, now translate quickly, we have cracked the code!" ”

"What?! Cracked the code? No way. WHEN WANG FENG HEARD THIS, HIS EYES WIDENED, HE SHOUTED, AND QUICKLY THOUGHT ABOUT THE LETTERS HE HAD READ BEFORE, WHICH TRANSLATED: "YEJIABAOZANG (YE FAMILY TREASURE)." ”

"There is absolutely nothing wrong with it, not a single letter of the English alphabet, and the classical cipher is the breakthrough of this code."

Qin Han took Wang Feng's hand, and his eyes couldn't hide his excitement.

Wang Feng also muttered: "Am I going to become a millionaire?" ”

But they are still too simple, after the Morse code is translated, there is only the sentence: "The Treasure of the Ye Family", and the rest is numbers, Zhu Gao password, and a series of translated English that are still not in the right mouth.

They fell into despair again, went home, and plunged headlong into the book house of classical codes.

"I'll go, Ye Sen is too skinny, the password is only a few words, and most of the sentences are: 'Ye Family Treasure', isn't this a fucking girl who takes off her pants and farts?!?!"

Wang Feng scolded, Ye Sen really deserves to be damned, to call him so cheap.

Looking at Qin Han, who was still reading carefully under the tungsten lamp, he asked, "Is there anything else you have found?" Otherwise, that's all for today. ”

"I'll go boil water, Wang Feng, you can take a look."

"Okay Xiaohan, let's go to bed after washing."

After Wang Feng finished speaking, he was stunned when he saw her, and then blushed, they have been sleeping together for the past few days.

Sleeping in the same bed is completely the rhythm of husband and wife life.

Qin Han went out, Wang Feng closed the classical code, and took out the "Caesar Displacement Code" borrowed from the library, every time he went to the library, he could borrow a book, but he had to pay a deposit of five cents.

Wang Feng was lying on the bed with the book, looking at the ceiling: "Hey, when will it be unlocked?" What if someone gets there first? ”

Idle and bored, pull out the 'Eisar' vortex, try to analyze the object "Caesar's Displacement Code", Wang Feng also analyzed the book for the first time, tried the object before, but there was no response, the 'Ei' vortex, it is only for humans or creatures.

But this time, there was a miracle: two big characters appeared in front of Wang Feng - [Kai Er]

"it?!"

After Wang Feng saw the prefix, he suddenly jumped up from the bed.