Fresland isn't as big as Wickham City, and it looks a bit old, but Wickham City doesn't have a Mage Guild, but it does.

Narkh is actually not very big, because it is blocked by the Hengduan Mountains in the south and the small Sakhalin Ridge in the east, so there is actually no foreign invasion trouble, and it is the most stable place. Of course, when the empire was strong, it was also the most honest place.

Jia Yi walked into the city, and the city looked different from other cities, and the people he saw on the road were not the kind of people who did business, but most of them were carrying bows and swords, dressed as mercenaries and adventurers.

Moreover, there are many shops on the street that seem to be selling weapons, and Jiayi has already seen four or five along the way, and many of them have a sign hanging in front of the store, with the words "Buy herbs", "high price" and so on.

Jia Yi asked all the way to find the mage association in the city, which was the second mage guild he had seen, and the previous one was in Memphelbo.

This mage guild looks very distinctive, the surface is actually covered with moss, and there are even branches growing from the walls of the guild, spreading a small green shade to cover the bottom, which makes people wonder how this small building can still exist safely and not collapse.

"Hello, how can I help?"

As soon as Jia Yi walked into the guild, a mage apprentice wearing an apprentice robe came over to greet Jia Yi.

He had just let people settle Xiaoqing, and in order to avoid trouble, he had already changed into a white robe in advance, and at the same time put the mage badge on his chest, otherwise with the atmosphere in the mage association, no one would come to greet him.

It can be said that the hospitality in the association is a snobbish eye, and only shows a smile on the mage with status.

Jia Yi pointed to the mage badge on his chest and said, "I received a notice to come and replace the mage badge, I heard that the mage badge has been upgraded and updated, what do you think?"

The apprentice was stunned for a moment, and then his face showed some embarrassment: "This, I'm just an apprentice, and I haven't used the mage badge." ”

Although he was embarrassed, he couldn't be angry, although the other party was about the same age as him, he was already a white-robed mage, and being able to become a white-robed mage at this age was really a talent, hard work, and resource support. In his eyes, Jia Yi may be the kind of child of a big family who has studied all year round and is not familiar with the world, and he came out to travel at this time.

Jia Yi was also stunned for a moment, and smiled apologetically: "I'm sorry, I'm just curious about this new mage badge, it is said that all mage badges need to be replaced, and there is a better mage key on it, which is more secure." ”

"Yes, our president spoke highly of the new badge, saying that it solves a big problem and that it will be more secure for us to communicate in the future. ”

Although no one usually steals other people's letters, as a mage, secrecy is a very basic demand, and the demand is never-ending. After all, no one knows if there will be some taboo things in their letters, and no one can guarantee that their magic experiments will not be exposed to some taboos.

Many spell experiments can seem evil, while others are really dangerous, and they must be done with a request from the Mage Guild or the Supreme Council. For example, the undead spells of the academy, the study of this kind of spell requires a corpse, and it must be purchased, and it must be within the academy to do this kind of experiment, otherwise it is illegal.

But most of the mages are not people who follow the rules, it is normal not to apply for permission in order to make it easier for themselves, and it is also very difficult to apply, and there are some other violations in the usual way, and everyone does not want to be known by others when they exchange letters.

Saying that, the apprentice secretly glanced at Jia Yi and said, "I didn't expect you to come to replace the mage badge so quickly, our new badge has only arrived not long ago, except for the mages in the association, you are the first person I have seen to change the mage badge from outside." ”

He was a little curious, the replacement of the mage badge was just a notice, and not many people knew about it. Jia Yiyi was not a mage near Friesland at first glance, otherwise he would have been impressed, and he didn't know how he knew the news.

He asked tentatively, "Did you come to change the badge after seeing the notice from our association?"

"Oh, no, I was notified, so I'm here, I'm out there, and this is the closest Mage Guild. ”

The apprentice's eyes are not quite right, it is not easy to receive information in time when he travels, and he can still use a small communication circle with him at any time, and ordinary mages are reluctant to waste it like this. After all, replacing the Mage Badge isn't too urgent, and it doesn't matter if it's postponed a little.

Jiayi didn't know that the other party had made up so many background settings for his brain, so he followed the other party to the inside of the association and met the president of the association.

The president of the mage association here doesn't look young, he looks like a middle-aged man, Jia Yi has just graduated from the academy and hasn't adapted to it for a long time, most of the mages outside are over 30 years old, 4 or 50 years old are also common, and there are relatively few people in their early 20s like him.

This should be a high-level gray-robed mage, unless it is a capital of a country like Memphelbo, otherwise a white-robed mage will not be allowed to be the president of a mage association, because it is far away from the magic center, and some of them will not be too willing.

On the other side, I was also a little surprised to see the mage badge on Jia Yi's chest, although there were many medicinal herbs here, but there were not enough herbs to attract the white-robed mage, most of the people who came here were low-level mages or even mage apprentices.

The president hurriedly greeted Jia and gave a mage salute to Jia.

Jia Yi returned the salute, and the apprentice on the side introduced, "President, this mage has come to change the badge. ”

The president looked at Jiayi, but he didn't think too much, the two introduced each other and chatted a few words, connected Jiayi into the association, went up the stairs, and came to the reception room of the association. When he went up the stairs, he was always afraid that he would step on the stairs with one foot, and he could see the roots and trunks of the trees sticking out from the inside of the association.

This building looks quite old, and I don't know how it hasn't collapsed after so many years.

When Jia was an hour, there was a big tree next to his grandmother's house, and once there was a strong wind, the tree was blown down, and there was a big hole in the wall—the roots of the tree reached into the inside of the wall, and when it collapsed, the wall was brought down. Jiayi is now also afraid that one day the tree that grows in the association will fall, and the entire association will collapse.

The reception room of the association is actually a small room, the outer side is for the mages who come to sit, the inner side is for the use of the association, and there is a door inside and one outside, which is used by the mages who come and the mages in the association.

Such a room has a good level of confidentiality, and most transactions with privacy requirements will be in it.

Jia Yi sat down on the outside, the president signaled, went in through the small door on the inside, and after a while, he came out with a small lead box in his hand, which is often used as a temporary storage container for spell items, because it is cheap, and the spell concealment is also good.

The president handed over the lead box, and Kaichi took it and opened it, the new badge was no different from the original, at least from the outside.

Kaichi picked up the badge, and the president next to him introduced: " This badge doesn't seem to have changed, the main thing is that the key inside has changed, the original was the traditional mage key used, and now it has been replaced by a new one called the asymmetric key, the same as the original, you can store five sets of keys, but you have to pay attention, the original key you can give the key to the other party, now you have to make sure that you give someone else the public key, this public key and the private key are separate, and if you want to send a message to someone, you should use the public key given to you by the other party for encryption, don't use your own private key. ”

Jia Yi patiently listened to the other party's introduction, although in fact he knew more about this key than the other party, after all, the algorithm was invented by himself.

Although there is encryption inside the badge, Jia Yi also peeked into a little corner, and the encryption algorithm inside is still its own, and it has not been replaced with a new one. There are many ways to implement asymmetric encryption algorithms, but the Supreme Council did not start from scratch, and the algorithm used by Jiayi is already very mature, and they have not bothered to make too many changes to this core algorithm for a while.

The core algorithm of the key is not afraid of being known, the core of the algorithm is large number decomposition, and it is theoretically impossible to crack this algorithm at present, even if Jiayi's supercomputer wants to crack it in his last life, it is quite difficult. Although there are prophetic spells, none of them can predict the answer to a math problem.