Chapter 62

"Signal shielding? Satellite communication signal shielding, so satellite reconnaissance can always do it, right? There will be no problem with our Xia Kingdom's star bucket system for location positioning and monitoring, right? ”

A woman sitting next to Si Qing was the first to speak, and Si Qing also recognized the identity of this colleague, she was a technician of the intelligence department, according to her, it was impossible for country M to cut off the ground monitoring of the star bucket satellite system, the elder clicked on the table of the command table, and a high-altitude positioning picture was sent to everyone's position, only to see a huge irregular white halo in the center of the picture, it was obvious that country M used the laser anti-satellite array in advance, in order to buy time, Before Xia Guo came up with a way, he caught the hidden "reef" and retrieved the lost samples.

Although I didn't get the content I wanted, I could still see the very obvious trajectory of military vehicles and personnel activities from some marks next to the halo, and it was obvious that in order to seize the "reef", the people of country M were afraid that they had made a bloody investment this time, and vowed to find out the "reef", which also meant that there was not much time left for the elders to do so.

After a while, Elder Ji said:

"The Great Elder has given an approval, he must save the "reef", even if he unfortunately dies, he must bring his body back to China for burial, this is an explanation to all the comrades who are fighting abroad for the motherland in the hidden battlefield, and if anyone can solve the current problem and rescue the "reef", even if they can't bring back the medicine sample in the end, they can also make a big credit, and the promotion of the rank in January next year will be given priority, if the "reef" is saved and the medicine is brought back, the great elder promises that he can promise a condition, Everyone should know what that means. ”

For this "reward", the expressions of several people present were a little moved, a condition prescribed by a great elder? To put it simply, it is possible for anyone present to take another step, or to seek some kind of power, to know that it is very difficult to get a greater promotion if you just rely on ordinary accumulation and contribution, in short, several participating officers and technicians have become more focused, not that all of you present are people who have seen good eyes, it can only be said that human "habits" are like this, the same thing, there is a pursuit and simple participation are two different things, rewards are not the decisive factor for success, But definitely the key part.

The intelligence section technician then advised:

"We can call another satellite to reach the observation area, and then bypass the limited range of country M's laser anti-satellite-satellite equipment to obtain the ground situation in the area where the "reef" is located, and then we can figure out a way. ”

The non-commissioned officer beside Elder Ji was obviously the deputy commander of the research brothers this time, and he once again helplessly explained:

"We have considered this method, but because the way of transfer of high-orbit satellites is reversed, it takes a lot of time to reach the designated location, and with the technical capabilities of country M, we cannot be sure that there is no second laser anti-satellite equipment there, and even if we get the ground detection situation there, there is still no way to bypass the wide-area signal shielding there, except for the signal of the military communication satellite of country M, the signals of other bands are blocked."

Si Qing asked at the right time:

"Is there a way to crack the military signal band of country M within the shielding range? I have some experience in this area and maybe I can help. ”

The non-commissioned officer immediately passed an encrypted signal data judgment to Si Qing, who just glanced at the analysis data on it and knew the difficulty of cracking it, and the principle of military satellite encryption has two parts:

1. The physical isolation of the intranet, 2, the network cipher machine and the channel cipher machine have encrypted the application data during the transmission process, and the intermediate monitoring must be ciphertext, which is invisible to the user. There are these two layers of technology to greatly reduce the risk of leakage of the trivial content, for the symmetry algorithm, it is convenient to brute force cracking, but as long as the key length is long enough, the difficulty of cracking is extremely great, as long as it is greater than the cost of the attack, it is OK, for example, it takes 1 week to crack it, and the key replacement cycle is 1 day, it is safe. For asymmetric algorithms, they are all based on mathematical problems, such as large number operations, elliptic curve solving, etc., and it is extremely difficult to crack the private key when the length of the private key is long.

And now the era of quantum cryptography is coming, its important role is to solve the problem of key distribution, it is more difficult to crack the relative encryption, the M army is the algorithm public key is super long, the safe cryptographic algorithm depends on the algorithm logic, cryptographic parameters, key three levels, the M army only protects the key, our army is confidential three, the strength is high enough.

Although it is not completely impossible to crack, but the time and manpower it takes is definitely not a small amount, considering the urgency and confidentiality of this rescue plan, it is obviously not feasible, roughly estimated the difficulty of cracking and the proportion of time, Si Qing can only shake his head and say:

"The parameters and logic of this encryption technology are not unsolvable, but if you want to decipher it without attracting the attention of the M army, it will take at least 1-2 months......................"

Several people present heard Si Qing's words, and they all fell silent again, and they also questioned Si Qing's role in this rescue headquarters, after all, Si Qing is too young, even the technician next to her is thirty-five years old, and the children are about to go to elementary school, Si Qing can't convince the public if he doesn't make any "contributions".

Then the officer, with a scar on his face, proposed:

"If we can't contact the "reef", then we can also send a team of people to search for the last contact place through Xia Guo's intelligence system in country M, or take a more risky step and secretly end the laser anti-satellite weapon first, even if it is to turn off the wide-area signal screen-shield, although it is dangerous, but the possibility of results is also the greatest, isn't it? ”

This time, it was not the deputy commander who spoke, but Elder Ji himself said:

"This idea is feasible, but the consequences can not be estimated, if the situation gets out of control, it will directly lead to a diplomatic and military conflict between the two countries, and then our Xia country is also very disadvantaged in international public opinion, such a big hidden danger is not good, and even if the search and rescue team finds the "reef" in the last lost place, there is no way to get in touch with us and no way to leave there, as far as the news obtained by our spy network, even if it is the troops of country M who participated in the roundup, It is also a squad unit that relies on special satellite communication equipment to carry out information communication, which is very unfavorable to the situation of our spy personnel, and we cannot pile up the so-called fruits with senseless sacrifices. ”

The "Scar" officer originally wanted to persuade Elder Ji to "be kind to the soldiers", but looking at Elder Ji's unquestioning eyes, he still didn't say anything, it was obvious that the discussion of this rescue plan had reached an impasse, whether it was technical or military, there was little hope that this rescue would succeed.

The so-called military reconnaissance satellites are reconnaissance carried out using artificial earth satellites. It is a major form of space reconnaissance. It can fly in space for a longer period of time and can launch it to the intended position according to the intended reconnaissance purpose, which is most conducive to military reconnaissance.

It is mainly responsible for strategic reconnaissance tasks, and can also be used for campaign reconnaissance and tactical reconnaissance tasks. The main means of obtaining strategic and campaign intelligence. It is usually organized by the High Staff Organs. It has the characteristics of large scope, fast speed, good results, and is not limited by national borders and geographical conditions, and can conduct regular or continuous reconnaissance and monitoring of a certain area, and can obtain military intelligence that is difficult to obtain by other means. The satellite reconnaissance system consists of a satellite, a launch site, a measurement and control system, and a ground application system.

The reconnaissance satellite subsystem detects and receives the electromagnetic wave signals radiated, reflected and emitted by ground targets in accordance with the assigned reconnaissance mission and the determined orbit, records and stores them on film or tape and other carriers, recovers the satellite or the re-entry capsule equipped with the information carrier on the ground, in the air and at sea, or transmits the data to the ground receiving station in real time directly or through a data relay satellite by means of radio transmission, and the ground application system is processed and interpreted by optical, chemical, electronic computer and image processing equipment. Gain valuable intelligence from it.

When using satellite reconnaissance, it is usually necessary to clarify the tasks in accordance with the intentions of the superiors, select the reconnaissance method and reconnaissance scope, and establish a reliable work system. The main methods include imaging reconnaissance, electronic reconnaissance, missile early warning, and maritime surveillance. Satellite imaging reconnaissance is used to obtain image intelligence of the battlefield situation and target areas, and to obtain target image information by using imaging equipment such as visible light, infrared, hyperspectral, and synthetic aperture radar installed on satellites. The information obtained is directly transmitted through the spaceborne data transmission system, or recorded by the data storage device and returned to the transmission in a timely manner;

The ground application system processes the received data or recovered film, interprets and identifies the nature of the target, determines its location, and compiles it into information for distribution to various users.

Where there is a spear, there is a shield, directed energy laser jamming equipment and electronic anti-defense weapons have come into being, and jamming satellite signal reception is the most commonly used satellite jamming method. During combat, the jamming transmitting antenna is used to receive the satellite signal on the target, and the high-power interference signal with the same frequency or non-same frequency is transmitted with the satellite signal. Co-channel interference is mainly based on power occupation, and the power occupation of the satellite receiving channel within a certain frequency range makes the field strength of the interference signal much greater than the field strength of the satellite signal that normally reaches the ground, forming interference, suppression, and destroying its normal reception. Non-co-channel interference refers to the use of high-level interference signals to saturate the high-frequency head of the target satellite signal receiving system.

Another way to carry out electronic jamming on a satellite is to disrupt the normal operation of the satellite or the normal operation of the payload. Satellites almost all need to receive remote control commands from the command center, return telemetry data, attitude control and other information, if the characteristics of the remote control signal of the enemy satellite are mastered by means of detection, it can be interfered with, so that the target satellite loses ground control and cannot operate normally, and it can also transmit remote control commands to change the operating state of the target satellite, such as deviating from orbit, changing attitude, and so on.

Fortunately, Xia Guo's Xingdou satellite system is advanced enough and has sufficient preparations in electronic warfare, if the self-developed satellite of the general country is as simple as playing a balloon in the eyes of country M, it can directly crack the "control" at the remote end, and then let it have an "accident" and can no longer be used.

The meeting was silent for a few minutes, Elder Ji glanced at everyone who was meditating, and his heart became more and more disappointed, and suddenly he thought that when Si Qing came, he asked him to bring a "supernumerary" who was still in school, but he actually just saw that Si Qing was his granddaughter, and reluctantly trusted the young man she wanted to bring, after all, as a twenty-two-year-old student, if he wanted to find a way in this level of "duel", I am afraid it would be like a fantasy, but now the situation is indeed very bad, if there is really no way, He could only sacrifice the identities of some agents and even his lives to bring back to the "reef" according to the worst plan, but at this time, Elder Ji was the last thing he wanted to see.

He also crawled out of the pile of dead on the battlefield in his early years, and the spirit of not abandoning and not giving up was engraved into his mind, and also engraved into every "battle scar" on his body.

Thinking of this, Elder Ji said to Si Qing:

"Captain Si, the one you brought............ Technician, does he have a way to deal with this? ”

Si Qing heard that Du Jin was asked by Elder Ji on his own initiative, she was both scared and glad in her heart, although according to Du Jin's previous statement, he had a lot of confidence in this matter, if it could be successfully solved, it would definitely be a good opportunity for him to soar, but Si Qing also clearly realized that Du Jin only understood a general situation, and did not have a deep understanding of the blockade of the M army, if his method did not work, I am afraid that the bad impression left behind would have a great impact on his future, especially if Elder Ji in front of him is still his grandfather, is regarded as the closest relative to his family except for his mother, if he has a bad impression of Du Jin, then the relationship between the two will ......................

But in the end, Si Qing still chose to trust her lover, and she didn't want to make a decision on Du Jin's future without any discussion, if it really meant anything, she was also determined to face it with Du Jin, and then she replied to Elder Ji:

"Elder, the name of the person I brought is Du Jin, he explained before that he had the confidence to deal with this matter, and I put my trust in him and his ability to bring him here."

And the scar-faced officer said with some contempt:

"I'm afraid this Du Jin, like Captain Si, is also very young! Whether his ability to handle such a thing can meet the requirements of handling is still unknown, isn't it? ”

As soon as Si Qing wanted to refute, Elder Ji stretched out his hand and pressed down to alleviate it:

"As the saying goes, heroes come out of teenagers, and it's not wise to measure ability by age alone, since everyone has no feasible solution, then it's not impossible to let this technician named "Du Jin" try it, after all, I called everyone here to brainstorm, isn't it? ”

Then Elder Ji pressed a virtual button on the desktop, and a non-commissioned officer outside the combat command room immediately received an order:

"Invite the teenager in the lounge here, and if it's safe, there's no need for a second body search."

Then the non-commissioned officer took two special combat personnel to the door of the lounge on the other side, and after saluting the two soldiers who had been "on guard" at the door, they opened the carved wooden door of the lounge and entered it and said to Du Jin, who was resting:

"Hello, Mr. Du, thank you for your patience, and now please go to the combat command room with us."

Du Jin opened his eyes, as he expected, or as "Xiao Ai" expected, the signal blockade and satellite countermeasures of country M made it impossible for Si Qing to quickly solve the problem and start the rescue, at this time he "shot", as long as he succeeded, he definitely got the most attention and recognition, after all, the victory and on-the-spot rescue, obviously the latter is more valuable, of course, Du Jin himself also wants to do his part for the country and that agent, as the people of Xia country, he does not want his motherland or compatriots to be threatened.

In fact, after a little movement of his hands and feet, Du Jin followed the three heavily armed soldiers out of the lounge, looking at the special equipment of the three people in front of him, Du Jin was still very envious, after all, most boys have no resistance to guns and equipment, but he is just envious at this time, at least in the current environment, he still doesn't want to carry a gun to the battlefield, the speed of promotion is too slow, and the danger factor is too great, after all, the bullet doesn't matter whether he has been strengthened by blood marks or not, A headshot is absolutely dead, and you can't die again.

The non-commissioned officer took Du Jin to the door of the command room, and then pressed the button next to the door, after a few seconds of waiting, the door control system made a "tick" sound, and the heavy alloy door automatically slid open to the right, as soon as he entered the door, he first saw the location of Si Qing, and glanced at it from the people present, he recognized that the old man in front of him was the highest status among these people, and when Du Jin confidently observed, he found that this old man was actually Elder Ji of the Xia State military, this senior can be said to be the soul of the Xia State army, Although he rarely appears in public meetings, everyone knows Elder Ji's ability and status, and of course he is also one of Du Jin's idols.

After all, such an invincible general who led the army of the Xia Kingdom was definitely a military all-rounder who could learn from all aspects for Du Jin, and when he saw Du Jin coming in, Si Qing immediately got up and came to Du Jin's side, and said to Elder Ji:

"Elder, this is Du Jin."

Elder Ji looked at Si Qing's slightly nervous brows, with a gratifying smile on his face, he looked at Du Jin, although his face was a little unnatural, but he was not stage frightened or shy on the whole, but seemed very stable and calm, at least on the surface, on the one hand, Elder Ji initially recognized the fact that Du Jin was his granddaughter's boyfriend, and on the other hand, judging from the confidence shown by Du Jin, his expectations for Du Jin to come up with a rescue plan were also greater, but it was only a little bigger, After all, the difficulty of this rescue is too great, and he also knows the great difficulty of this.

Seeing that Elder Ji nodded slightly, Du Jin didn't wait for Elder Ji to ask again, but said directly:

"Hello Elder! I already have a preliminary solution to this rescue operation, can I trouble the elder, can you give me a detailed explanation of the specific situation? ”

The deputy commander on Elder Ji's side got up and told Du Jin again about the difficulties in the rescue plan of the "reef", in fact, Du Jin didn't need to let people explain the situation, from the previous report of 'Xiao Ai', he had already understood the situation about the "reef", or that he was more delicate than everyone present in some aspects, but in order to make himself "look" normal and avoid unnecessary suspicion, he could only pretend not to know the specific situation, otherwise his unknown source of information would immediately attract the attention of some people, After all, even if it was Si Qing, he only got specific information when he entered the command room.

If he could get such a detailed situation in the lounge and give the perfect solution directly, then he would be the most suspicious.

After listening to the information of the deputy commander, Du Jin lowered his head and pondered for a moment, after all, he has to do a full set of acts, he wants to package himself as a genius, not a god, the former country will pay attention to, and the latter will also focus on it, it's just that kind of research-style observation, Du Jin doesn't want to be a guinea pig.

In addition to Si Qing and Elder Ji, the rest of the people almost regarded Du Jin's contemplation as an act of "pretending", in their opinion, Du Jin would give up immediately, and said that his ability could not solve this solution, and then left very embarrassed, after all, Du Jin was indeed too young, plus some of these people had prejudice against Si Qing, causing those people to think the same way about Du Jin, and after a while, Du Jin's answer slapped them in the face.

"Elder, although the situation is a little more complicated than I thought, I am still sure."

"Huh?"

"Is he sure?"

"How could it be ............"

Incredible thoughts emerged in the hearts of everyone present, they didn't expect that Du Jin was really not pretending, but really had a way to solve the rescue dilemma, although Du Jin had not explained his own method, but everyone couldn't help but put away the arrogance in their hearts, and began to look at Du Jin with serious eyes.

Elder Ji was also very surprised, he didn't think about Du Jin's solution to these difficulties just now, but this hope was very small, he had actually made the worst choice, and calling Du Jin was actually a way for him to convince himself, and Du Jin's affirmative answer shocked him very much, Elder Ji immediately took a copy and asked eagerly:

"Oh? What method? How sure are you? ”