Chapter 62

"Signal shielding? Satellite communication signal shielding, then satellite reconnaissance can always be done, right? There will be no problem with location positioning and monitoring of our Xia Kingdom's star system, right?"

A woman sitting next to Si Qing spoke first, and Si Qing also recognized the identity of this colleague. She was a technician from the Intelligence Section. According to her, it was impossible for Country M to cut off the ground surveillance of the Star Dou Satellite System. Elder

After clicking on the command table, a high-altitude positioning picture was sent to everyone's location. There was a huge irregular white halo in the center of the picture. It was obvious that Country M had used laser anti-satellite in advance.

-The purpose of the star array is to buy time, capture the hidden "reef" and retrieve the lost samples before Xia Guo comes up with a solution.

Although the desired content was not captured, from some marks next to the halo, one can still see very obvious tracks of military vehicles and personnel activities. It is obvious that in order to seize the "reef", the people of the M country are afraid that this time

They have spent a lot of money and vowed to find the "hidden reef", which also means that there is not much time left for the elders and the others.

After a while, Elder Ji said:

"The Great Elder has issued an approval. We must rescue the "reef". Even if he unfortunately dies, his body must be brought home for burial. This is an explanation to all the comrades who are fighting for the motherland in hidden battlefields abroad.

And whoever can solve the current problem and rescue the "reef", even if he cannot bring back the pharmaceutical sample in the end, can still be credited with a great contribution. He will be given priority for promotion in January next year. If he saves the "reef" and brings back the pharmaceutical sample, he will be given priority.

, the great elder promised that he can promise a condition, and everyone should know what this means."

Regarding this "reward", several people present looked a little moved. The conditions offered by a great elder? To put it simply, anyone present who wants to take a step forward, or seeks some kind of power, has the right to do so.

Possibly, you must know that it is very difficult to get a larger promotion just by relying on ordinary accumulation and contribution. In short, several participating officers and technicians have become more focused, not that those present

You are all discerning people. I can only say that human "habits" are like this. Pursuing and simply participating in the same thing are two different things. Rewards are not the decisive factor in success, but they are definitely a key part.

The technician from the Information Section immediately suggested:

"We can reach the observation area by calling another satellite, and then bypass the restricted range of the M country's laser anti-satellite equipment to obtain the ground conditions in the area where the "reef" is located, and then we can think of a solution."

The noncommissioned officer next to Elder Ji was obviously the deputy commander of the research brothers. He explained helplessly again:

"We have already considered this method, but because the high-orbit satellite transfer method is in the reverse direction, it will take a long time to reach the designated position, and with the technical capabilities of country m, we cannot be sure that there is not a second laser reflector there -

Satellite-satellite equipment, and even if we get the ground detection situation there, we still can't get around the wide-area signal shielding there. Except for the signals of the military communication satellites of country m, all other band signals are blocked. "

Si Qing then 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, maybe I can help."

The noncommissioned officer then passed an encrypted signal data judgment to Si Qing. Si Qing just glanced at the analysis data above and understood the difficulty of cracking. The principle of military satellite encryption has two parts:

1. Physically isolated intranet, 2. The network cipher machine and channel cipher machine have encrypted the application data during the transmission process. What is monitored in the middle must be ciphertext, which is invisible to the user. There are these two layers.

Technology has greatly reduced the risk of leaking trivial content. For symmetric algorithms, brute force cracking is convenient, but as long as the key length is long enough, cracking is extremely difficult. As long as it is greater than the attack cost, it is ok. For example, cracking requires calculating 1

Weekly, and the key replacement cycle is 1 day, it is safe. Asymmetric algorithms are based on mathematical problems, such as large number operations, elliptic curve solving, etc., and it is extremely difficult to crack the private key if it 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 relative encryption. The public key of the algorithm is too long. The secure cryptographic algorithm depends on the algorithm logic, cryptographic parameters, and keys.

There are three levels. The m army only protects the key, and our army keeps all three secrets. The strength is high enough.

Although it is not completely impossible to crack, the time and manpower required are definitely not a small amount. Considering the urgency and confidentiality of this rescue plan, it is obviously not feasible. I roughly estimated the ratio of difficulty to cracking and time.

, Si Qing could only shake his head and said:

"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 fell silent again. They also had doubts about Si Qing's role in the rescue headquarters. After all, Si Qing was too young, even the age next to her.

The next most skilled technician is already thirty-five years old, and his children are about to go to elementary school. If Si Qing doesn't make some "contribution", he won't be able to convince the public.

Then the officer with the scar on his face suggested:

"If we can't contact the "reef", then we can also use Xia Guo's intelligence system in country m to send a team of people to search at the last place we contacted, or we can take more risks and steal the laser first.

Anti-satellite weapons, even if the wide-area signal shield is turned off, although this is dangerous, it has the greatest chance of being successful, isn't it?"

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

"This idea is feasible, but the consequences are unpredictable. If the situation gets out of control, it will directly lead to diplomatic and military conflicts between the two countries, and our Xia Kingdom will also suffer a great loss in international public opinion. Such a huge hidden danger is not feasible.

, and even if the search and rescue team finds the "reef" at the last place where contact was lost, they can't get in touch with us and can't leave there. According to the information obtained by our intelligence network, even those M country troops who participated in the roundup are

Relying on specialized satellite communication equipment for message communication on a squad basis is very detrimental to the situation of our intelligence personnel, and we cannot pile up so-called fruits with unnecessary sacrifices."

The "scar" officer originally wanted to persuade Elder Ji to "be kind but not to use troops", but looking at Elder Ji's unquestionable eyes, he still did not say anything. It was obvious that the discussion of the rescue plan had reached a deadlock.

, whether it is technically or militarily, there is little hope for the success of this rescue.

The so-called military reconnaissance satellite is reconnaissance using artificial earth satellites. It is a main form of aerospace reconnaissance. It can fly in space for a longer time and can be launched to the expected location according to the intended reconnaissance purpose.

It is most conducive to military reconnaissance.

Mainly responsible for strategic reconnaissance missions, it can also serve as operational reconnaissance and tactical reconnaissance missions. It is the main means of obtaining strategic and operational intelligence. It is usually organized by senior staff agencies. It has a large scope, fast speed, good effects, and is not restricted by national boundaries and geographical conditions.

Features: It can conduct regular or continuous reconnaissance and surveillance of a certain area, and can obtain military information that is difficult to obtain by other means. The satellite reconnaissance system consists of satellites, launch sites, measurement control systems and ground application systems.

According to the assigned reconnaissance mission and determined orbit, the reconnaissance satellite subsystem detects and receives ground target radiation, reflected and emitted electromagnetic wave signals, records and stores them on carriers such as film or tape, and transmits satellites or equipment on the ground, in the air, or at sea.

The information carrier is recovered from the re-entry cabin, or the data is transmitted to the ground receiving station in real time by radio transmission directly or via data relay satellites. The ground application system processes and analyzes the data through optical, chemical, electronic computers, and image processing equipment.

Obtain valuable intelligence.

When using satellite reconnaissance, the mission is usually clarified according to the superior's intention, the reconnaissance method and scope are selected, and a reliable working system is established. The main methods include imaging reconnaissance, electronic reconnaissance, missile warning and ocean surveillance. Satellite imaging reconnaissance is used to obtain battlefield information

Situation and image intelligence of the target area, using imaging equipment such as visible light, infrared, hyperspectral and synthetic aperture radar installed on satellites, to obtain target image information. The obtained information is directly downloaded through the satellite data transmission system, or through data storage

Equipment recording, timely playback and download;

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 intelligence for distribution to various users.

Where there is a spear, there is a shield. Directed energy laser jamming equipment and electronic anti-satellite weapons have emerged. Jamming satellite signal reception is the most commonly used method of satellite jamming. During combat, use the jamming transmitting antenna to point at the satellite signal receiving antenna on the target.

, transmitting high-power interference signals of the same frequency or non-co-frequency as the satellite signals. Co-channel interference is mainly based on power occupation, which occupies the power of the satellite receiving channel within a certain frequency range, so that the field strength of the interference signal is much greater than the normal arrival on the ground.

The field strength of the satellite signal causes interference, suppression, and destruction of its normal reception. Non-co-channel interference refers to the use of high-level interference signals to make the high-frequency head of the target satellite signal receiving system enter a saturated state.

Another method of electronic interference to satellites is to disrupt the normal operation of the satellite or the normal operation of the payload. Almost all satellites need to receive remote control instructions from the command center and send back telemetry data, attitude control and other information. If the enemy is known through detection means,

Depending on the characteristics of the satellite remote control signal, it can be interfered with, causing the target satellite to lose ground control and unable to operate normally. It can also send remote control instructions to change the operating status of the target satellite, such as deviating from the orbit, changing its attitude, etc.

Fortunately, Xia State's Star Dou Satellite System is advanced enough and fully prepared for electronic warfare. If the self-developed satellites of ordinary countries are as simple as popping a balloon in the eyes of Country M, they can be directly cracked and "controlled" remotely.

, and then make it "accidental" and can no longer be used.

The meeting was silent for a few minutes. Elder Ji glanced at everyone who was thinking hard, and felt more and more disappointed. Suddenly he thought that when Si Qing came, he asked for instructions to bring a "non-staff member" who was still in school, but in fact he was just

Seeing that Si Qing was her granddaughter, she reluctantly trusted the boy she was going to bring. After all, as a twenty-two-year-old student, it would be impossible to find a way in a "showdown" of this level.

It's like a night story, but the situation is indeed very bad now. If there is really no way, we can only follow the worst plan and sacrifice the identities and even lives of some agents to bring them back to the "reef", but this is what Elder Ji least wants to see at this time

.

He also crawled out from the pile of dead people on the battlefield in his early years. The spirit of never abandoning or giving up was engraved in his mind and in every "battle scar" on his body. Now Xia Kingdom is far from what it was back then.

There was no comparison, so he didn't want to let down the trust of those comrades who were fearful in the most dangerous places overseas and gained opportunities for the motherland.

Thinking of this, Elder Ji said to Si Qing:

"Captain Si, the... technician you brought, can he solve this problem?"

When Si Qing heard Du Jin being asked about it by Elder Ji, she was immediately frightened and grateful. Although according to Du Jin's previous words, he had great confidence in this matter. If it could be solved successfully, it would be absolutely beneficial to him.

It is a good opportunity to soar into the sky, but Si Qing also clearly realizes that Du Jin only understands a general situation and does not have an in-depth understanding of the M Army's blockade. If his method does not work, I am afraid it will leave a bad impression.

It will have a great impact on his future, especially when the elder Ji in front of him is his grandfather, who is the closest relative in his family besides his mother. If he has a bad impression of Du Jin, then the relationship between the two of them will be different in the future.

relation......................

But in the end, Si Qing still chose to trust her lover. Moreover, she didn't want to make a decision on Du Jin's future without any discussion. If something really happened, she was determined to face it with Du Jin. Then she

He replied to Elder Ji:

"Elder, the person I brought here is called Du Jin. He said before that he was confident in handling this matter, and I brought him here because of my trust in him and his abilities."

The scar-faced officer said with some contempt:

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

Just as Si Qing was about to refute, Elder Ji stretched out his hand and pressed down to calm down:

"As the saying goes, heroes are born in youth. It is not wise to only rely on age to estimate ability. Since no one has a feasible solution, it is not impossible to let this technician named "Du Jin" try it. After all, my name is

Everyone is here to brainstorm ideas, right?"

Elder Ji then pressed a virtual button on the desktop, and a noncommissioned officer outside the combat command room immediately received the order:

"Invite the young man in the lounge here. Under the condition of ensuring safety, there is no need for a second search."

Then the sergeant led two special forces members to the door of the lounge on the other side. After saluting the two soldiers who had been "on guard" at the door, they opened the carved wooden door of the lounge and entered to greet the resting people.

Du Jin said:

"Hello, Mr. Du, thank you for your patience. Now please come with us to the combat command room."

Du Jin opened his eyes. As he had expected, or as "Xiao Ai" had expected before, Country M's signal blockade and satellite countermeasures prevented Si Qing and the others from quickly solving the problem and starting the rescue. At this time, he "took action"

"As long as he succeeds, he will definitely get the most attention and recognition. After all, winning on the court and rescuing people on the spot are obviously more valuable. Of course, Du Jin himself also wants to do his part for the country and the agent. He

As people of the Xia Kingdom, we do not want our motherland or compatriots to be threatened.
To be continued...