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Chapter 181 hack!

"It's really free!" Lin Hong was surprised when he saw the returned coin, "What is the principle?" What's that little box? ”

Just now, Kevin put the small box on the microphone and played a tone, Lin Hong knew that this must be the key. Pen ~ fun ~ pavilion www.biquge.info

"This little box is an audio simulator." Kevin took the box out again, "In the Flyer community, they usually call it the 'blue box', and of course, I didn't make it blue. ”

"The program-controlled telephone exchange is controlled by receiving audio, the dual-tone multi-frequency technology I just said, the audio signal generated is relatively normal, in fact, there are some special audio signals, which can be controlled by the program-controlled telephone exchange, of course, these frequencies are confidential, and the telephone company will not make it public at all."

At this time, Kevin re-pressed the button on the "blue box".

"Toot-"

"Don't underestimate this frequency, it's useful in the phone system. In fact, the principle of this is very simple, when the program-controlled telephone exchange hears this frequency, it will immediately respond to it. You know, machines are generally stupid, and they just follow the process that was originally set. ”

"2600Hz is a switch in the telephone network, and when the program-controlled switch receives this frequency, it will allow long-distance calls to be connected without incurring additional costs. If you want to make a free long-distance call, all you have to do is send one of these frequencies to the program-controlled switchboard. ”

"How was this discovered?" This is a vulnerability in the telephone system, it must be the confidential content of the telephone company, and it will not be easily known by others, Lin Hong is interested in how the flyers discovered these vulnerabilities.

"Test! Keep testing! "The phone system is a huge black box that you can't see inside or know how it works, but that doesn't mean we can't explore it...... Only by constantly testing it and then seeing its reaction can we grasp its patterns. ”

Then, Kevin gave Lin Hong a brief introduction to the history of the flyer.

The history of the telephone flyer can be traced back to the fifties, when the pulse dialing method was just being replaced, and the telephone system began to fully use the dual-tone and multi-frequency audio dialing method.

In Virginia, USA, there was a little boy named Joseph Engosia, who was born blind but had a very bright mind, and he became interested in the telephone at the age of four, and discovered that it was possible to make calls by pulse dialing.

"You know, when God closes one door for you, He opens another." "Although blind people can't see, their hearing and touch functions are often much higher than normal people. This is a kind of selective forced evolution, and this evolutionary speed and effect amazes every geneticist and biologist! ”

When he said this, Lin Hong felt that Kevin seemed to have an indescribable pride and yearning in his heart at the moment.

"It's a very mysterious place." Kevin pointed to his brain again, "More sophisticated and complex than any machine invented by man." The intricacies of the telephone system in front of our brains are like the toys of primitive people......"

Perhaps feeling a little off topic, Kevin went back to the previous topic.

"Engasia was blind, his hearing was enhanced, and in addition he had the perception and control of audio. His tongue can produce very precise tones.

During a phone call, he gave a show to his friends in a whistle, only to find that their call suddenly cut off. So, Engasia called the phone company and asked them why they cut off their phone, but the phone company's customer service staff didn't know what to do. Having a spirit of exploration, Engasia began to try to find out why, and found that the frequency of his whistle was exactly 2600 Hz, and the telephone system seemed to dislike this frequency very much, and would hang up the phone as soon as it heard this pronunciation......

In this way, the door of the Flyer world was completely opened to him, and he became a Flyer who could control the telephone system with just his own whistle, so everyone called him 'Whistle'. ”

"How can you produce a precise frequency with just a whistle?" Lin Hong was amazed by his ability, how strong his control ability must be!

Kevin laughs: "It's not unusual, as far as I know, there are a lot of blind phone flyers in the United States, and they all have such abilities. ”

"Although the phone system is huge, the basic principle is there, and it may not change for decades, and even if they find such a vulnerability themselves, they will not be able to fix it in time for a while, because once the change is made, it will affect many aspects of content, which is why the telephone company has a headache for the flyers."

Hearing this, Lin Hong nodded thoughtfully, this is not difficult to understand, as the so-called "small ship is good to turn around", the more complex and huge a thing is, the greater the cost of changing it, not that he doesn't want to change it, but there is no way.

"It's the same thing with the SAS system, although they know that I have successfully gained control, but they can't stop me, unless they completely rebuild the whole system and fundamentally change the principle, otherwise if they want to block my access, unless the whole system is completely shut down, but obviously, the FBI will not accept this result, they have too many people to monitor every day, once it is closed, they will become blind, and they can only monitor the target person through the most primitive means."

"Of course, after so many years, it is time to upgrade the SAS system, according to the information I have received, the FBI has already begun to build a new system, called Aurora, compared to the old SAS system, this system is more powerful, using the latest computer communications and satellite monitoring technology, but I have not yet received more detailed information about the system." Kevin broke a shocking news to Lin Hong.

“aurora？ Satellite surveillance? ”

Hearing this news, Lin Hong subconsciously looked up at the sky, and he felt very uneasy at the thought that it might be at an altitude of tens of thousands of meters, and the satellite telescope might be aimed at him, transmitting his image to the monitor of a certain computer.

What secrets are there in this world?

"Hehe, it's not that exaggerated. This monitoring may be effective for the average person, but it can be very exciting for hackers. Cat and mouse game, it's exciting, isn't it? Of course, you have to reach a certain level of skill and be careful to hide yourself, otherwise if you alarm them, you will be on their watch list, which will be more troublesome. ”

Lin Hong could see that Kevin seemed to be enjoying the process.

They had reached the edge of the practice arena at this moment, and Kevin stopped:

"As I said, we are the same kind of people, and sooner or later you will all follow a similar path as mine, and the exploration of the unknown world has a fatal temptation for us. You may have noticed something, but I still want to give you two pieces of advice to save you some trouble and time on your road ahead. ”

"Please."

"If you decide to take a path of 'freedom,' then hide yourself as much as possible so that no one else notices." Kevin smiled, "Of course, if you want to live a fugitive life like me, I didn't say it." ”

"The second piece of advice, or rather a piece of advice, is that while black boxes are ubiquitous and worth exploring, the biggest and most mysterious ones are here." Kevin said, gesturing to his head.

"Others think that my hacking skills are very good, but in fact, there are many people in this world who are better than me, and the reason why I am better than them is that I am not hacking their computers, but their brains."

"Over the years, the FBI has also found my traces many times, but in the end it still passed by me, even if I stood in front of them, they didn't know that I was the person they were looking for, it was not that they were stupid, but that they had weaknesses in their hearts, and I was the one who was good at invading the weaknesses in their hearts...... I feel like it's an art, the art of invasion, the art of deception, or altogether as a discipline, social engineering! ”

The first piece of advice is that he has been mentally prepared, in this world, smart people, especially smart people who want to gain greater freedom, must restrain their light and make themselves as similar as ordinary people as possible, so that they can live more chic. In fact, he has been vaguely aware of this since he was a child, and after coming to the United States, many things he encountered have made him more aware of this, especially after knowing Kevin's deeds and learning about the existence of the SAS system, he is even more determined to pay attention to it as much as possible in the future.

Because, deep down in his heart, he had already decided that he wanted to become a hacker!

Kevin's second piece of advice exceeded Lin Hong's expectations, and at the same time, he was deeply shocked.

hack brain?!

Lin Hong looked at the young man with a beard in front of him with a shocked expression, he looked like he was in his twenties, but he seemed to have thoughts far beyond ordinary people, and his eyes revealed a sense of madness at the moment.

"People's psychological weaknesses, instinctive reactions, curiosity, trust, greed, and so on are all bugs in this 'black box', and you will find that exploring the black box of the brain is more challenging and fun than any other black box."

Kevin turned his head and looked at Lin Hong deeply: "You should have discovered the charm of this a long time ago, but it seems that you haven't made full use of your talent at all." ”

"The human brain 'Creator' has given mankind the greatest wealth, this is a treasure trove, the potential is huge, so far we have very limited mining and use of it, if you are interested, you can spend some time researching it."

After speaking, Kevin Mitnick walked towards Master Zhang Cheng with a drink, leaving Lin Hong alone to stand in place, digesting what he had just said.

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