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"This is still the central government, if you go to the local level, it is not difficult for some foreign investors to invest to find out the personal communication methods of the senior leaders of the local government, right?"

Hu Changsheng's face twitched twice. Pen, fun, pavilion www. biquge。 info

Lin Zheng is right, it is true that his mobile phone number is confidential, but there are really not too many foreigners who can call his mobile phone number, since these people can call their own number, saying that these people have no contact with intelligence agencies such as the CIA, even Hu Changsheng himself does not believe it.

What Lin Zheng said was a bit sensational, and he didn't know what Hu Changsheng had in mind, so he took out his mobile phone and looked at it.

"Oh, by the way, even when the phone is not in use, it can be 'transformed' by the other party into a bug placed on you......"

"Can it be eavesdropped?" Hu Changsheng was stunned for a moment, and subconsciously glanced at the mobile phone in his hand.

Well, Nokia's.

"Yes," Lin Zheng nodded: "The mobile phone is in standby mode when it is not in use, but at this time, the mobile phone still sends and receives signals transmitted by the base station, so it can be activated immediately when a call comes in. ”

Hu Changsheng was stunned, shook the mobile phone in his hand and said to Lin Zheng: "In this way, it may be in our talking skills." The content of our conversation was tapped through this mobile phone? ”

"It's not impossible." Boss Lin is a good boy and admits this very frankly.

A few drops of sweat instantly appeared on the tip of Hu Changsheng's nose: Lin Zheng was right, it was impossible to prevent it. It's hard to prevent.

His fingers trembled twice, and Hu Changsheng's fingers pressed on his on/off button for a long time.

"It's useless," Lin Zheng looked at him sympathetically: "Even when the phone is turned off, the mobile phone can be used for eavesdropping." ”

"What?!"

As soon as Lin Zheng said this, not only Hu Changsheng couldn't sit still, but even several old leaders couldn't sit still: Nima's mobile phone can still be eavesdropped on his face? Is that an exaggeration?

"Really, I know that sounds exaggerated and sensational. Eavesdropping in the call state is understandable, but how can it be eavesdropped in the shutdown state? ”

As soon as Lin Zheng's words fell, Hu Changsheng couldn't help but nod: That's right. How can it be bugged when the phone is turned off? It doesn't make sense, I'm all turned off.

"Mobile phones are not the same as ordinary electronic devices, in fact, shutting down is the same as deleting text messages and deleting a file from the computer, which is a symbolic operation. Because the real deletion of content is very time-consuming and troublesome. It will not be less than the writing time, so whether it is a mobile phone or a computer, it is not completely deleted, but to make a mark, use this mark to tell the operating system that the file has been deleted, but in fact the file has not been deleted, which is also the principle that many computers can recover data after data loss. ”

"The shutdown of the mobile phone is similar to that of the computer, which is a deep standby state, at which time the mobile phone can still be detected by the signal sent by the base station. That's why we're able to hear a chime like 'The user you're calling is off,' you think. Since the base station can detect it, the eavesdropper can also use a special instrument to open the mobile phone microphone by remote control, and use this way to eavesdrop on the user's conversation. ”

Lin Zheng looked at them sympathetically, he clearly saw that although the expression of an old chief had not changed, his hand holding a cane was bruised, this is the fearlessness of the ignorant, who would have thought that a small mobile phone could do a lot of things?

Lin Zheng is embarrassed to say where I am talking about, the Americans are even more exaggerated, people directly spy on mobile phones, emails and networks around the world, if it were not for Mr. Snowdens's Prism plan, the whole world would not know how long it would have been kept in the dark.

Of course, it's also possible that everyone already knew each other, but since we can't do the Americans, let's shut up and pretend not to know.

Americans actually know that we know, and they know that we pretend not to know, so Americans pretend not to know that we know, and we also pretend that Americans don't know, in fact, everyone knows, but in order to be able to play this game of "guess you guess" together, everyone pretends not to know. It's just that the damn guy named Snowden is to blame, and everyone is passive together, don't look at the righteous indignation of the European countries scolding the Americans there, but it is very likely that they were angry with Snowden's ignorant bastard who broke the rules of the game: how did you Americans do it? How did you raise such a two-hundred-five? Will everyone be able to have fun in the future?

Hu Changsheng's hand trembled twice, and the Nokia in his hand didn't hold it steadily, and it fell on the table with a bang, but he didn't care about it at all, and asked Lin Zheng with a pale face: "Is there no way?" ”

"Of course not," Lin Zheng shook his head, stretched out his hand to take Hu Changsheng's mobile phone honestly and unceremoniously, and took out the battery by himself, and then said: "After the battery is removed, the base station at this time will not be able to detect the signal of your mobile phone, and the prompt sound fed back will become 'The user you are calling cannot be connected' or 'The user you are calling is not in the service area', only at this time, the mobile phone is truly not eavesdropped." ”

The old revolutionary is the old revolutionary after all, the old chief with thinning hair and the whitest green uniform frowned: "Xiao Lin at the same time, is there no other way than to buckle the battery?" ”

"Of course there are," scared people not lightly, Lin Zheng of course has to be responsible for helping people get their souls back, and said with a smile: "The solution is actually very simple, one is to encrypt the mobile phone in the way of the traditional wired phone, and encrypt the signal from the hardware, so that you don't have to worry about the mobile phone being tapped, oh, by the way, that's what the Americans do, and the mobile phones used by the government to allocate to dignitaries are all encrypted mobile phones." ”

"Encrypt your phone? This is a good way," the old revolutionary nodded: "Since it is the first way, there must be a second way?" ”

"Yes, the second way is to use a mobile phone signal interceptor," Seeing the curious look of the old revolutionary, Lin Zheng immediately knew that this was a signal that he asked himself to say in detail, and suddenly had a plan in his heart, and said: "The mobile phone signal interceptor also needs a mobile phone signal blocker, simply put, even if a certain technical means are applied, similar to the electromagnetic interference used by the military, a large number of garbled characters with no actual content and meaning are sent within a certain time and geographical range to interfere with the electronic signals within the region, so that mobile phones, Mobile communication devices such as BP machines cannot send and receive signals,"

That's a good idea! Hu Changsheng's eyes suddenly lit up!

Although he didn't say it, Lin Zheng had already understood what he wanted to say, and after a brief pause, Lin Zheng added: "But in essence, this is a way to kill 1000 enemies and damage 2000 by themselves, although the other party can't listen to it, but our mobile phones can't be used either, so the use of this kind of thing is very limited, and it is only suitable to use it in places or activities such as the college entrance examination, some major meetings that need to be kept secret, and some military places that need to be highly confidential. If it is normal, until there is no strong enough technical means to deal with this problem, my personal advice is to try not to use a mobile phone but a landline, and as for the mobile phone, you can give it to the secretary. ”

Hearing Lin Zheng's words, the gloom on Hu Changsheng's face was swept away, and he said with a smile: "Since there is a way to deal with it, Mr. Lin, can you do this mobile phone signal interceptor?" ”

"No problem." Lin Zheng nodded hurriedly: a new income has arrived.

"By the way, in addition to eavesdropping and surveillance, there is also a low-tech but more unguardable means," Lin Zheng said this, deliberately paused slightly, and saw that the old leaders and Hu Changsheng all looked interested, and then continued: "There are two new technologies, called mobile phone voice changer and number tamper, I won't talk about the principle, just talk about the effect of this thing: the function of the voice changer is to make people change their voices, and the more advanced ones can even imitate the voice of a person with a certain characteristic; On the other hand, a number tamper is a disguised number that can be used to deceive the mobile phone that receives the call, and I think it is necessary to attract the attention of the state......"

Before Lin Zheng could finish speaking, Hu Changsheng and several old chiefs' faces turned pale.

And this technique? Although I don't know how much of the opportunity of this technology is, in terms of harm, if it is properly applied, it is even worse than the aforementioned centralized monitoring method!

A very simple example, for example, if the intelligence agency of a hostile country writes down the language habits, audio signatures, and commonly used mobile phone numbers of a high-level leader, wouldn't it be completely possible to get the people below to voluntarily report some secrets without the leader's knowledge?

And when the subordinates see that their mobile phones are displayed with the leader's number, and their ears hear the leader's voice, how can they suspect that the person who really brought this call is actually a person they don't know?

But the information was taken away by others so unconsciously, and I still don't know anything about it!

Thinking of this, Hu Changsheng couldn't sit still anymore, wiped the cold sweat on his forehead and said, "Xiaolin, what other crooked things do you know?" As a quick comment, I seem to have thought of this question too simply. ”

Several old chiefs also nodded solemnly. (To be continued.) )r527

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