Magus Tech Chapter 310: The secret hidden in the book is…

In the night, Angel continued to speak in a weak voice, the more she went wrong, the more outrageous she became.

"Next...go straight and meet a tavern called 'Water and Fire'... let me go and turn right, then..."

Listening to Angel's words, Li Cha suddenly interrupted and asked seriously: "Do you know where you are now?"

"Huh?" Angel was taken aback for a moment, then looked down at the ground, "on the ground?" looked up at the starry sky: "under the stars?"

"..." Li Cha was silent for a while, let out a sigh of relief, and said to Angel: "Okay."

"Huh?" Angel didn't understand.

"Let me take you back to Baishi Tower Academy." Richard said. From Li Cha's point of view, according to Angel's degree of road blindness, even if she shows the way a hundred times, she may not be able to arrive smoothly. It's better for him to send the other party back and settle the matter once and for all, so as to save the other party from any accidents and unnecessary troubles on the way back.

Li Cha stepped forward, glanced at Angel who hadn't reacted yet, and said, "What? You don't want to go back anymore?"

"Ah... no... no." Angel said hastily.

"Then keep up, keep up."

"Ah, yes." Angel quickly caught up and followed step by step.

Li Cha and Angel, one in front and one behind, soon arrived in Baishi City.

Walking in Baishi City and walking to the familiar "Salt and Fire" tavern, Li Cha found that the tavern was closed. However, there was still a faint singing voice wafting out of it. It was a song he had heard before, and it was a little familiar. Maybe the meaning is not understandable, but the rhythm of the song is the same:

First it is the 2/4 beat of "strong and weak, strong and weak", then the 3/4 beat of "strong and weak and weak", and then the 6/8 beat of "strong and weak and weak, second strong and weak".

"Tap, tap, tap, tap..."

While listening to the music, Li Cha took Angel around the tavern, turned left, and continued on...

Finally, the singing of the "Salt and Fire" tavern disappeared, and Li Cha stopped at the entrance of the White Rock Tower Academy. Pointing forward, Li Cha said to Angel behind him: "You should know how to get here, right? You shouldn't need me to send you back to your dormitory, right?"

"Ah, no need." Angel quickly shook her head.

"That's good, go in, I'm leaving."

"Ah..." Angel lowered her head and walked into the academy. Turning around and taking a sneak peek at Li Cha, he found that Li Cha had disappeared into the darkness, bit his lip, and walked into the depths of the academy with a complicated expression.

…

Laboratory, main laboratory.

Li Cha came back.

Because all the insignificant matters were resolved, Li Cha relaxed a little at this time, strode to the experimental table in the room, took out the five newly acquired books of the Black Spirit Empire in the space iron ring, and started Research.

Placing the five books on the table, Li Cha quickly turned to the last page, scanned the numbers on the Black Spirit Empire logo, his eyes flickered.

The five numbers are 3, 7, 24, 27, and 29. According to the current world version of the Lychrell number verification, the obtained palindrome numbers are 33, 55, 66, 99, and 121, respectively.

The previous books are:

, palindrome number 11;

, palindrome number 22;

, palindrome number 77;

, palindrome number 99.

That is to say, among the five newly acquired books, only one book is duplicated, and four are new:

The first new book, Ghost Legend;

The second new book, a collection of fables;

The third new book is a relatively simple wizard spell book.

The fourth new book, Autobiography of a Wizard, is similar, but without the eccentricities of grooming male slaves.

After clearing up the books, Li Cha's eyes brightened, and he had to say that this night was a big harvest, and what he gained was comparable to everything he had gained before.

It was previously guessed that the number behind the book logo of the Black Spirit Empire should be within 40. Therefore, through the Lychrell number verification process, only 11 palindrome numbers were obtained.

11!

Now books with 8 palindrome numbers have been obtained, and only books with 3 palindrome numbers have not been obtained.

In this way, even if you can't unlock the secrets hidden in the book, you should be able to see the general framework.

Li Cha's eyes were sharp.

What is the secret hidden in the book?

He doesn't know the secret yet, but he has some guesses about the way to hide the mystery.

The method of hiding mysteries in books should not be some kind of hidden text—only the text can be revealed by using special conditions such as water immersion and fire. In doing so, first, it cannot be preserved for too long, and second, it has no connection with the numbers and palindromic numbers on the logo of the Black Spirit Empire on the last page of the book.

The numbers on the Black Spirit Empire logo and the Lychrell number verification palindrome are some very special numbers. They should not be confusing information, but are related to secrets.

Then...

When mentioning numbers, Li Cha couldn't help but think of a very common look-up table replacement method in the early days of cryptography.

The so-called look-up table replacement method, in simple terms, is the codebook method: to transmit information, instead of using normal words, replace it with some seemingly meaningless numbers.

The person who receives the information must have a corresponding password book. According to the content of the password book, the correct information can be obtained only after the numbers are matched one by one, so as to prevent people from intercepting and leaking the secret halfway.

This method can be regarded as flexible and changeable. Be careful. In order to prevent the codebook from falling into the hands of the enemy and causing heavy losses, you can periodically replace the codebook. Be more careful, you can use a different book as a brand new codebook every time you pass on ~IndoMTL.com~.

For example, if the sender gives the message "137, 826", it may represent the 137th and 826th words in a certain book.

The person who receives the information checks the book and compares it. The results are different depending on the book. It may be a "success" or "failure" message, or an instruction such as "attack", "retreat", or "hide". , there is almost no possibility of leakage. Of course, there are still some gaps with encryption methods developed based on computer technology on the modern earth, such as symmetric encryption DES, 3DES, AES encryption, and asymmetric encryption RSA, elliptic encryption, etc.

Having said that, what is the result obtained by using the look-up table replacement method in the current book?

Li Cha first picked up the book with serial number 1 and palindrome number 11, found the 11th word in the book, and found that it was the word "ke".

Then pick up the book with the second serial number and the palindrome number 22, and find the 22nd word in the book, which is "fruit".

The number 3, the palindrome number is 33, the 33rd word, "Li".

The book with the serial number 4 and the palindrome number 44 is temporarily unavailable, omitted.

No. 5, palindrome number 55, the 55th character, "ancient".

The serial number is 6th, the palindrome number is 66, the 66th character, and the separator.

The number 7, the palindrome number is 77, the 77th character, "Du".

The book with serial number 8 and palindrome number 88 is temporarily unavailable, omitted.

The serial number is 9th, and the palindrome number is 99, the 99th character is "er".

The number 10, palindrome number 121, the 121st word, "Mongolian".

The book with serial number 11 and palindrome number 363 is temporarily unavailable, omitted.

The end result is...