It is said that some people can become especially excited at times, and in the opinion of the dono, Tateki is such a person.

"Alas...... I always feel like Miss Tateki is having a crazy time today......"

Draped in her nightgown, she sighed.

"I'm sorry, I'm sorry, I didn't expect that either." Mikoto clasped her hands together, but looking at her expression, it was obvious that there was not much apology in it. "But your image is completely shattered."

"My image?" Dome blinked, "What do I look like to you?" ”

"Hmm...... It's probably like a student idol. ”

“？”

She tilted her head.

"You don't really realize anything...... Forget it, that's not a big deal. Mai Trin flicked her bangs, "Speaking of which, I haven't congratulated you yet." ”

"Congratulations?"

Dome looked even more confused.

"It's a matter of upgrading. Ah, it hasn't been officially announced yet, though. ”

"Misaka-san......" she looked at Mikoto with a strange eye, "You hacked into Tokiwadai's database again?" If they are discovered, they will be punished. ”

"What does it matter? Anyway, it's something that will be announced sooner or later. If it's really important, you should use a higher level of encryption. ”

Of course, this is not the first time that Dome has persuaded her like this, but Mikoto obviously has no intention of introspection at all.

"Don't be too fearful, Misaka-san. Even if it is ability, there are obstacles that cannot be bypassed. As far as I know, there's at least one way you can't do anything about it. ”

"If that's the case, I'd love to see it."

Dome Nai's slender eyebrows twitched slightly. This can be said to be her mistake, she forgot to use Mikoto Misaka's strong character, this kind of talk will only have the opposite effect. So she added:

"That's not about your ability, it's an encryption method that can't be stolen theoretically. That is to use the principle of quantum entanglement to encrypt. Once someone eavesdropping, because it is also a measurement behavior, the entanglement state will be changed, so that it will be discovered immediately when it is compared. This absolute encryption cannot be broken by any means, because it is built entirely on the laws of quantum mechanics, and its secrecy is determined by the principle of uncertainty. As you know, the uncertainty principle is the limit of human understanding and use of nature, so even Misaka-san, you can't do it. I'm not very good at cryptography, but there are rumors that it's already being adopted. If you're not careful, you might get into an accident. ”

"But Tokiwadai probably doesn't have this kind of technology yet, otherwise ......."

"Sister-sama!" Shirai Kuroko jumped out and shouted, "Is there one thing, is it another thing to do this kind of thing!" Hacking is not allowed, absolutely absolutely not allowed! This is common sense and social consensus! ”

“…… I don't want you to accuse common sense ......"

"Common sense also needs to be determined by people and things."

"Then your common sense is really useful. Don't come up! ”

It's a conversation that doesn't know what to call it. Fortunately, the girls present are more or less used to it. Although it seems to be used to this kind of thing, it is not necessarily a good thing to look at it. Maybe after getting used to this kind of thing, it will become synonymous with nervousness.

Of course, there is one person who will not become a person with big nerves, because she is originally a person with big nerves.

"Ah, Shirai-san, what a person who doesn't know what to do."

"Photon ...... after marriage"

"Alright, alright. People are always changeable."

The two LV.4 stared at each other, about to turn into a farce-like unfolding, and the Dome waved his hand at the right time to stop the pointless conflict.

Fortunately, Shirai and at least sold her account after marriage. The two turned their heads in different directions.

"However, I don't think people can be like her, no matter how changeable they are, right?" After marriage, photons shifted the topic and said. Naturally, she was referring to Standing Tim, who was excitedly planning a change in his plan. She even deliberately added, "It's obviously an adult, but it seems like a person is crazy." ”

"Go and apologize, classmate." To her surprise, the person who came out to accuse her would actually be Qiongnai, which made Mitsuko stunned after marriage. "You know the idiosyncrastic nature of synesthesia, and it brings many advantages. But have you ever wondered why humans have not universally evolved this kind of interconnected senses? ”

After being stunned by what she said, Mitsuko didn't have time to answer, and Mikoto helped her out in time.

"Is it because humans are starting to learn to use tools and don't need to rely solely on these senses, right? It's like absolute tonality. ”

"That's really one of the reasons, and perhaps the most important one. But that's not all. Dome nodded, then shook her head. The senses are the origin of external stimuli, which can change personality. This is the most basic attempt. However, if it is a deeply linked sense, have you ever thought about what kind of experience and what kind of load the person will have? ”

She slowly looked at the standing tree. Even she herself realized what a terrible gift it was when she learned the truth behind Tateki's abilities.

"The sound will bring the touch of tearing skin, the smell will eat away at every part of the eye, and the color will destroy all syllables......" she slowed down, "Another reason why humans have not evolved such abilities is that they are beyond the capacity of humans. After marriage, not all capable people are like us. Secure capability development has endured painful attempts. There are certain faulty abilities that should not be discovered that were not realized at the time. ”

This is not because the development itself is not sufficiently secure, but rather that the capability itself is a disaster for the parties that is beyond their load. Kaoru Tateki's ability development was such a successful mistake.

Such a side of Kaoru Tateki's personality is completely understandable. External stimuli shape personality, and for her, external stimuli are too strong.

"If it's Miss Tateki, I think even if there are some personality problems, I can forgive it."

"Our little princess, since you know my abilities, you should also know that your whispers are as clear to me as seeing what is in front of me, right? You still speak ill of me when you know this? ”

Limu interrupted the conversation with the person in charge and turned to this side.

As she said, she could see, smell, touch, and even taste the Vault. From the very first of their conversation, all the content of the message was received by her through all means of perception.

Even their mood swings can be as clear as color.

"I know. In any case, you are a respectable person. It's not bad to say, I don't want people to misunderstand you. ”

Limu snorted softly, not answering, not knowing what she was thinking.

"Well, I'm sorry...... I lost my words. ”

After the marriage, Mitsuko bowed deeply to her and apologized. Kaoru Tachiki can even see some of her emotions, and she can naturally see that she is completely sincere.

"It's okay, it's good for me. At least I don't have to worry about being stolen by mind-readers. ”

“？”

It seemed like a completely unrelated matter, but Limu said it lightly.

"If anyone who reads minds wants to read my memories, they will first read my sensory memories together. I don't think it's going to be a pleasant experience for the average person. ”

She even shrugged her shoulders, looking indifferent.

It's a bit of a bittersweet experience, but she's telling the truth. The sensory stimulation of her abilities is ever-present, so that all her memories are imprinted with this extreme sensory stimulation. She is confident, even if she is Tokiwadai, the LV.5 spiritual ability does not dare to read her memory. This is something she has repeatedly confirmed in the past two years of running on the bench.

“……”

Is that a good thing? The girls didn't know what to say.

"But our little princess. To truly 'see' someone's emotional color, at least that person needs to be within the range of what I can see. That is, the vision that can get the farthest way of information. It seems that those who are capable of the spiritual system do not have this prerequisite. Do you know if there are any limitations to abilities like psychic induction? ”

"Miss Tateki, why are you asking this?"

"Not me." Limu made a helpless look, "It's someone who wants to convey a message to someone who doesn't know where." ”

"That shouldn't be possible. Although people with psychic abilities seem to be able to understand and transmit even a thought, an idea. But in theory, that's not all limitless. Mind reading and mind transmission are both point-in, and cannot be established without a specific object. Is that so? Dome turned her head to ask Mikoto and the others, and received their unanimous answers. Although they couldn't say why, Dome knew a little: "Theoretically, this is actually the same principle as the quantum encryption technique I just talked about with Misaka-san. Psychic abilities can also be physically seen as the transmission of information, which limits it to the uncertainty principle. Then, the observation cannot be one-sided. If you don't know the other party's observation method, you can't be sure of the information, because the information is uncertain before the observation, and the entangled state will be destroyed after the observation. So only when one party knows that the other party has taken a measurement can we know what the other party's information is. So all telepathic abilities have a common principle, and it must be pointed. If the subject is unclear, no psychic person will be able to convey any information. ”

She had spent a lot of time learning about this ability, and that was because she had always had a hope. She has a long-lost friend who has this ability. She once hoped that her friend's psychic induction would help her find her. It was only later that this insurmountable obstacle was discovered from physical theory.

This is an answer that has made her lost for a long time, and even a little depressed for a while.

==========================================

Note: Here is an explanation of the problem of quantum encryption based on the pesticide statement. Another important point in this chapter, which is that there is a possibility of spoilers for quantum information transfer, so I will leave it aside for the time being:

If we use photons to emit signals, the photons contain information of 1 and 0, respectively. We know that, according to quantum mechanics, the photon signal is just a superposition of 0s and 1s before the acceptor makes a measurement. So if the receiver sets the wrong polarization, he gets sometimes 1 and sometimes 0. There is no guarantee that both sides will be the same.

Well, when sending a message, the sender only tells the receiver the polarization setting, not what bits of data are being sent. The receiver then keeps only the same bits of data as them. That's where it gets interesting.

If someone eavesdroppers, the sender's photons must be intercepted. The problem is that the eavesdropper doesn't know the sender's polarization, he can only guess. Obviously, then, he will be wrong half the time. As a result, when the receiver receives the message, even if his settings are the same as the sender, there is a 50% chance that the message will be wrong. Thus, when the receiver and the sender are compared, the sequence is different, and the eavesdropping is discovered.

There was a previous chapter where someone was discovered for this reason. It's not that her hacking skills aren't high enough, but because it's an insurmountable obstacle in theory.