Although Jia Yi is happy that his friend is his loyal reader, he is also afraid that she will always come to urge him.

When a person has something to do, he always urges himself in person, how can he stand it.

Jia Yi thought for a moment and said, "Selena, since you like to read "The Lord of the Rings so much", you might as well go and sort out the Lord of the Rings for publication." ”

"Publishing?"

"Yes, "The Lord of the Rings" is serialized in the newspaper after all, and there must be many people who haven't seen it or read it all, so it's better to publish a book after gathering and sorting it out, and you don't have to go through the newspaper when you want to read it a second time, it's so convenient to have a book directly. ”

Jia Yi thought about it, as long as he let Selena have something to do, he would not bother himself.

It's already easy to publish books now, and it's even more convenient that Valoka has a publishing business.

Now there are several types of printing machines, in addition to magic printing, there are also movable type printing, and the improved magic engraving printing.

Among them, the cost of movable type printing is the lowest, and Jiayi also invented the paper type, after each typesetting, you can use special wet paper to cover the typetype after typesetting, and after drying, the layout after typesetting is rubbed down, which is the paper type.

When it is time to use, the lead-tin alloy is poured into the paper type, and the inverted mold is the typeset layout, which can be directly used for printing. This method can use fewer letters, and the original typesetting can be disassembled and reused after making the paper type, and the paper type is left after each typesetting, and it is also convenient to reuse it in the future, and only the lead juice needs to be poured into it.

The paper pattern is very lightweight, easy to store and transport, and it is even possible to make the paper pattern and then transport it to another place for printing, so as to ensure that the printing style is uniform in different places.

The paper type is made of special paper, and the ignition point of the paper is generally about 2, 300 degrees, and the temperature after the melting of the lead-tin alloy is about 4, 500 degrees, and the paper made by special treatment can already withstand this temperature, so there is no need to worry about the lead water pouring down to ignite the paper type.

The college already had the idea of using paper to open a newspaper branch, where the newspaper was typeset and made into a paper type, which was then transported to the branch for printing and publishing.

In this way, there is no need to ship a large number of newspapers, and it is more convenient to transport, for newspapers, the cost of long-distance transportation is now higher than the cost of printing.

It is said that during the Republic of China, when Lu Xun and other writers fled, they carried paper with them and tried to print it in other places.

The magic engraving is the printing technology developed by Yansimado, first on the paper for scheduling, or the typesetting of the movable type is copied, and then the magic is used to automatically engrave the corresponding wooden or metal printing board.

The prints produced by this process are of better quality, the handwriting is clearer, and the pictures can be printed, but the cost of using magic to make engravings is higher, and the requirements for equipment are also higher, which is not as simple as the paper type.

This method is a relatively advanced printing method, and only some hardcover books that sell well will be printed using this method, or books with rich illustrations, but most of the books printed by this printing method are more expensive.

In general, book printing is used in combination with paper movable type and magic engraving, which can not only print pictures, but also reduce costs, and the paper type is also more convenient to preserve and transport, and it is also convenient to use. In addition to the printing machine, the magic engraving also needs to be equipped with a magic engraving machine, which costs a lot of money.

Finally, there is the old-fashioned magic printing, which is the most expensive, the best quality of printing, and can also print fine patterns, but except for some special books, there are very few books printed using this method.

Most of the people who still use this method are photocopies of magic-related notes and notes, trying to restore the most authentic original appearance.

And this kind of book is probably only consumed by mages.

Even within Valoka, overprint has begun to appear as a color printing technology, but it is more expensive and too slow, so it has not been launched.

After sending Selena to book publishing, Jia Yi had a few days to spare.

Then he received a letter from Yanel, and Selena had already gone to the academy and got back the manuscript of Jiayi kept by the academy newspaper, which is also the relationship between the two sides is not ordinary, otherwise ordinary people will never be able to get it.

The novel written by Jiayi did not leave a proofread manuscript, and the rough proofread manuscript was directly given to the newspaper for proofreading and publishing, if Selena took the manuscript directly from Jiayi, she still needed to spend time re-proofreading carefully, and the manuscript obtained from the newspaper was proofread, and it only needed to be reformatted, which saved a lot of time.

At this time, there was no electronic document, and it was not convenient to copy the manuscript, although there was magic, but most of the time it was manual copying. In order to be lazy, Jia Yi himself left nothing but a manuscript, and even handed over the manuscript directly in the last few issues.

Selena gets the manuscript and brings back a letter from Yanel to Kaichi.

The letter didn't say much about it, mainly because Selena came to take the manuscript, but looking at the mage key on the surface of the envelope, Jia Yi was a little distracted.

The mage's key is a means of secrecy, before the mage sends the envelope, he uses a key that only two mages know to encrypt the envelope with the spell of "mage's key", then the envelope can only be opened with the correct key, if you use violent means, it is not only easy to damage the letter, but also leave traces, and the letter cannot be restored.

In many cases, the exchange of communication between two mages is the exchange of secret keys, and the mage uses the secret key left by the other party to encrypt the letter before sending it, so that only the mage with the corresponding key can open it.

But this method is not foolproof, the encryption method on the envelope is symmetrical, that is, the encryption method and the decryption method are the same, if someone can crack the encryption key of a certain mage, then he can peek at the letter and use the same means to encrypt it without leaving a trace.

Generally speaking, it is of course difficult to crack a mage's key, but if everyone's magic level varies greatly, it is not impossible to crack it.

In particular, if mages want to use keys to communicate, they need to exchange keys, which makes it impossible to guarantee the security of keys. Even if you can't crack the key, you can get it through a roundabout way.

In many cases, a mage has to design several sets of keys to give to different mages according to the level of secrecy, and for those who are not very familiar with it, use a key with a lower secrecy level.

Of course, if you don't bother, you can provide a separate key for each friend, but when the time comes, you can't guarantee that you will be able to find the corresponding key to decrypt the letter.

Jia Yi looked at the mage key on the envelope, and suddenly thought of the encryption methods commonly used in the network. In the long-term war between espionage and counter-espionage, encryption and decryption, the encryption methods in the Internet protocol have been very rich, not to mention absolutely impossible to crack, but the difficulty of cracking is no longer what ordinary people can imagine.

Among these encryption protocols, one of the most commonly used algorithmic ideas is asymmetric encryption.

The so-called asymmetric encryption is to generate a pair of secret keys at one time, one of which is kept by oneself, called the private key, and one is publicly available, called the public key, if someone wants to transmit information to the other party, they use the other party's public key to encrypt, and then the person receiving it uses their own private key to decrypt.

Because the private key is only stored by itself and not sent outward, this encryption method is much more secure and is not responsible for the security of the public key that is exposed to the outside world. This greatly enhances the security and convenience of exchanging key points, and allows you to share the public key with a third party like a business card without worrying about insecurity.

This kind of encryption algorithm does not have high requirements for magic strength, but the requirements for mathematics and calculation are much higher, which is just in line with Jiayi's current level, Jiayi has now become a white-robed mage, and he has fixed the acceleration rune, which is the time when the computing power has increased greatly, and it is just right to test his skills.

The secret key of the mage is kept in the mage badge, if Jiayi's encryption algorithm can be popularized, or even become one of the standards of the mage badge, then it is equivalent to every mage will have at least one Jiayi product, which is exciting to think about.