Back to the Republic of China to be a editor

Lao Wang, who was taking a nap on the recliner, woke up as soon as he woke up. He opened his eyes and looked at the operator, "What's the matter?"

"We seem to have successfully attacked." The operator handed two notes to Lao Wang.

Hearing this news, Pharaoh lost all sleepiness, stood up and went to the side to turn on the post lamp on the terrace.Tang Hua also woke up, "What, there is a result?"

Lao Wang looked at the note in one hand, the expression on his face was both shock and ecstasy.He opened the first smaller note and showed Tang Hua the words on it.

There are only 6 letters on the small note:

YOMTTQ

Tang Hua also took out the note from his shirt pocket, which was the "key" he set for the M-209 virtual machine when he generated the ciphertext.Tang Hua's note also has 6 letters: YOMTTQ

Tang Hua pulled the long note out of Old Wang's hand and looked at it. Since the key has been accurately cracked, there is no suspense about the content of this note.The ciphertext has been deciphered, and the content of the long note is the article in the English newspaper he used to encrypt.

He raised his wrist to look at his watch, it was 3:50 in the morning.

It has been 6 hours and 20 minutes since I handed the note to Pharaoh.

A total of 55 hours and [-] minutes from the start of the computer.

1950年9月14日夜，军委情报部二局、电子信息工业局使用TC50超级计算机，对M-209密码机成功进行唯密文攻击，在掌握了2500个密文的前提下强行破解。

Within hours of the first attack, after the attack is successful, if the enemy does not notice it temporarily and continues to use the original key, then the newly intercepted secret message will be "broken in seconds" for the Second Bureau of the Intelligence Department of the Military Commission. It only needs to reverse the M-209 virtual machine Come and run it.If the enemy realizes that the password has been broken and replaces the key, it will only take a few more hours and hundreds of kilowatt-hours of electricity.

Besides, how can it be so fast to change the secret key? If the password is broken, you can't send the new secret key by telegram. You have to send a messenger to send a note...

……

Midnight, September 9, Incheon.

"Operation Chromite" unfolded almost exactly according to the tide table.The landing operation is divided into two phases: the first phase targets Wolmido Island, code-named Green Beach, and the second phase attacks the north and south sides of Incheon Port, code-named Red Beach on the north side, and Blue Beach on the south side.

MacArthur was sitting on his amphibious command ship "Mount McKinley" with his corncob pipe dangling from his mouth. Through the portholes, he could see the rough waves and the landing fleet advancing in the waves.

At the end of August and the beginning of September 1950, when the Pusan ​​defense circle was stabilized and the U.S. military had no worries, MacArthur made a plan to implement a large-scale amphibious landing in Incheon, and asked the U.S. military to restore the Marine Corps that had not been formed after World War II. Expedition.As soon as MacArthur's plan was put forward, it was opposed by many senior generals of the US military. The reason was that Incheon's hydrology and terrain were harsh, the tide fluctuated greatly, and the maximum current velocity reached 8 knots.But MacArthur insisted on landing in Incheon, because this is the most unexpected location.

"Are you willing to let our troops wait like cattle and sheep in the circular defense circle like a slaughterhouse? Who is willing to be responsible for such a tragedy? Of course, I will never!"

"If my estimates were wrong, and if I were to fall into a defensive situation beyond my powers, I would withdraw our troops myself, and the only loss would be my personal and professional reputation. It will not fail, it will win, and it will save 10 lives."

At the meeting of the United Nations Command, MacArthur's posture was not so much speaking as speaking.He seemed to appreciate everyone's pessimistic tone, and even the anxious look on their faces when they argued, because all of these became the foreshadowing of his speech.With his stubbornness and the prestige he accumulated in World War II, MacArthur not only persuaded the unmanageable ministers of the armed forces in the Joint Chiefs of Staff, but also after repeated statements, anger, and threats, President Truman finally had to agree to the Incheon landing operation plan of.

Later fighting proved MacArthur's bet was correct.In several other alternative landing sites for the U.S. military, the Korean People's Army deployed mines provided by the Soviet Union, starting with thousands of mines for each landing site.But Incheon only has a few sparse Japanese stockpile mines from World War II. Not only that, but the People's Army defenders in front of Incheon are also pitifully small. On September 9, the U.S. Navy and the CIA conducted a joint survey of Incheon, which proved that although the landing here is quite difficult, there is still a time window for the landing ship to go ashore.Plan to pass!

Beginning on September 9, cruisers of the U.S. Navy and the Canadian Navy launched short-term shelling on Moonmido Island, which is the only island where the People's Army has a coastal defense force stationed.The U.S. campaign commander, James Best, chose to conduct artillery fire during the day, in order to fool the People's Army into thinking that it was an ordinary shore harassing shelling rather than a landing fire preparation.

In the early morning of September 9, when Tang Hua and Wang Yongjun were ecstatic with the deciphered M-15 message, the U.S. military launched another bombardment on Yuemido Island. Four cruisers and eight destroyers were very close to the shore. In less than 209 minutes, 4 shells were poured on Wolmido Island, and then an amphibious fleet composed of 8 ships and landing craft swarmed up. At 45:2845, the Marine Corps succeeded in grabbing the beach in a personnel landing craft. At 261:6, 31 "Pershing" tanks drove onto the beach.The largest artillery of the Korean People's Army on Wolmido Island is only 6 mm, and it lost more than half of its hits with the US destroyer in the first two days, and it was completely powerless to stop the "Pershing" assault. At 45:9, the U.S. military captured the commanding height of the island, Heights 76, basically occupying the entire island, annihilating a reinforced battalion of the Korean People's Army's coastal defense forces, with only 7 casualties.

After solving Wolmido Island, the US military forcibly landed on the land of the Korean Peninsula during the day.The terrain of the landing site was extremely bad, and many landing craft could not open the hatches after approaching the land. The soldiers looked up and saw the cliff, so they could only take ladders and start climbing the rock mountain directly from the landing craft.This is simply the rhythm of a random MG42 being overturned by the U.S. military on the beach.But unfortunately, there is no one on the beach, and the only guardian of the Incheon landing site-Wolmido Island coastal defense force has been wiped out.At this time, the Korean People's Army was like a gambler who lost his eyes. The recruits recruited after a little training were directly added to the various divisions in the Pusan ​​defense circle, and the rear was empty.

The U.S. troops who went ashore went straight to Fuping, cutting off the communication line of Pyongyang-Seoul-Busan.All the way to Gimpo Airport, which is only 20 kilometers away from Incheon and a regular airport with a 2000-meter long runway.The ammunition hoarded by the People's Army along the road from Incheon to Suwon was detonated by an air strike by the US military. These ammunition were all ready to be transferred to the front line in Busan. As a result, at least [-] tons of gun ammunition were reimbursed at once.

On September 9th, the U.S. military engineering unit began to build an artificial temporary dock in Incheon. Next, tanks, vehicles, supplies, and follow-up landing troops continued to land from the artificial dock.

On September 9, the five-star general MacArthur went ashore in Incheon.Still smoking his signature corncob pipe, still hugging a large group of reporters.

"I'm looking for a colonel named Lewis Puller, who is the head of a marine corps. I want to award a medal to this head personally." In front of the reporter, MacArthur's first words turned out to be this.

The communications staff quickly took the walkie-talkie and started calling.Then all the reporters heard Lewis Puller's voice on the walkie-talkie:

"I don't have time! If he's going to be honored, let him come here!"

MacArthur laughed, and immediately took the jeep to the direction where the gunshots had not stopped. There, he saw Lewis covered in gunpowder. The two saluted each other, and then MacArthur awarded Lewis the medal.

Half a month later, Tang Hua saw the American reporter's vivid live report from the newspaper. He was silent for a while, and then he could only comment on two words:

"Actor..."

Chapter 62, call Tang Hua back from Shanghai

Because Wang Yongjun came to Shanghai secretly and started to use TC50 to crack M-209 in Shanghai, Tang Hua also had to adjust his work plan.

According to the original work plan, Tang Hua and Lebedev planned to develop the software and hardware of TC50 in Shanghai, then pack them into boxes and pack them, and transport them directly to Jilin, where they would be reassembled at the supercomputing center next to the Fengman Hydropower Station. Yongjun's team summoned the past and worked on cracking M-209 in Jilin.

Now Wang Yongjun brought a team from the Second Bureau of the Ministry of Intelligence to Shanghai and worked very happily, so the plan was temporarily adjusted to: develop the cracking algorithm/software of TC50 in Shanghai, and complete the first secret verification of M-209 Afterwards, it was packaged and transferred to Jilin. During the transfer, Wang Yongjun's team and the maintenance team of the Shanghai Computing Institute also accompanied it.This is also very good, because the cracking algorithm/software Tang Hua and Lao Wang worked together, not only the development speed was fast, but the algorithm optimization was also done very well.The only problem is that Tang Hua will stay in Shanghai ten days longer than originally planned, so he can only send a telegram back to Beijing to inform Zhou Xuan of the extended business trip.

However, taking advantage of the extra dozen days of staying in Shanghai, Tang Hua finally got the new part from Suzhou—the computing unit used in the T51 computer.

还是和T50一样的山炮炮弹，但是尺寸略有些不同。T50的运算单元直径100毫米，长80厘米，T51改成直径102毫米、长79厘米。

The diameter is increased by 2 mm, which can optimize the arrangement of transistors, resistors and capacitors, and insert more small parts.In addition, it is intentional to make the computing units of T50 and T51 incompatible, otherwise Maozi may DIY by himself, using the computing unit of T51 to plug into T50...

The appearance has not changed much, it is still a gleaming thin steel cylinder, resembling a cartridge of a cannonball.After unscrewing the outer cylinder, Tang Hua could see the neatly arranged components inside the computing unit.

Each computing unit of the T50 contains 330 transistors, and the T51 has 370.The number has not increased much, because the T51 still uses transistors of the same specification and size as the T50. Although the next generation of smaller third-generation transistors is about to be successfully developed, Tang Hua feels that the second-generation transistors on the T50 can still top the T1950. one year.After all, there are no similar products in the Soviet Union and the United States. In the production of the second-generation transistors in [-], due to the improvement of process quality, the average service life without failure has almost doubled, which is also an important selling point.

The improvement of T51's computing power mainly relies on the improvement of computer operating frequency.Increased from 12000 Hz to 20000 Hz, plus a small modification of the computing unit and a slight increase in transistors, combined, the computing speed should double that of the T50.

It's a pity that there is only a trial product of the computing unit, and the cabinet has not been built yet, otherwise Tang Hua can do a DIY on the spot again. The architecture of the T51 is similar to that of the T50, with 12 computing units and 50K memory. The main improvement is in the output system.

First of all, the dot matrix printer, which has been planned for a long time, was finally successfully trial-produced in August.In the past, computers could only output punched paper tapes representing 8 and 0, but now they print numbers and letters directly on paper.

Speaking of letters, this is another improvement from the T51, and now it can finally display letters.Although it is not a character set like ASCII, but a complex display system built with minimal storage digits and transistors, it can already display 26 English letters and 33 Russian letters—all in uppercase.Of course, this "earth-made character set" can also display numbers from 0 to 9 and some simple symbols.As for how to display letters on the computer, the segment code screen is used for the time being. The seven-segment screen on the T50 has been upgraded to 16 segments, which can barely display 26 English letters—but the shape of some letters is particularly strange.Tang Hua remembered the method of displaying English letters on the 16-segment screen, but the Russian letters were a bit scratchy. In the end, he and Lebedev worked it out together.Although some of the letters have strange shapes, they are generally recognizable.

As for CRT monitors, they can't be used on computers yet, and it might not be possible by 1951.

Shanghai North Railway Station, September 9.

"Section Chief Wang, let's leave now. If the Korean War really happens, I will definitely go to Jilin to be with you." Tang Hua said while holding Wang Yongjun's hand.

Wang Yongjun nodded vigorously. "Minister Tang, you have given us an infinitely powerful weapon... I will definitely use it well. If I don't use it well, it must be my negligence if I don't use it to its fullest effect on the battlefield."

The two looked back at the TC-50, which was about to be loaded. The 12 large iron cabinets had been lifted onto the wagon by a team of soldiers, and then there were box-by-box computing units, input, output, printing, and other accessories. These are Disassembled from TC50 and shipped separately.The soldiers carried each other in a box, as carefully as if they were carrying a newborn baby.Three wagons were used to transport this TC50. Except for the TC50 parts, each wagon was stationed with a squad of soldiers, each with complete weapons and serious expressions.It seemed that the fighters of these three squads might have to be escorted all the way from Shanghai to Jilin.

"Are these soldiers... from the Intelligence Department of the Military Commission?" Tang Hua asked, "I mean, it's the end of September. After arriving in Jilin, the temperature at night there will be less than 10 degrees. Their clothes are a bit thin."

Wang Yongjun smiled, "Okay, okay, Minister Tang, you don't have to worry about everything... The 50 Center is now complete, with complete facilities, and troops stationed there to start operation. TC50 will be transported there, assembled and ready to go." Running. By the way, besides me, the 50 Center also has a radio expert, Li Qiang, do you know him?"

"Really, Li Qiang and I have known each other since we were in Yan'an." Tang Hua replied, "Why, he doesn't do foreign trade anymore?"

"I was ordered by the Prime Minister and came back from Moscow," Wang Yongjun said. "Now Deng Fa went to the Soviet Union to replace his vice minister of foreign trade. He was transferred back to the General Administration of Telecommunications of the Military Commission. When we were working on computers in Shanghai, Li Qiang was already there. Six radio listening stations have been installed on the China-North Korea border, and the listening area is said to cover the entire Korean peninsula, the area north of the 6th parallel in the northern part of the peninsula, and it is even possible to roughly locate the source of radio emissions."

"Then I'm relieved..." With Li Qiang and Wang Yongjun sitting in the 50 Center, the operation of the supercomputer should be stable.

Beijing.

"Mr. Paniker, I have called the UN Security Council and the Secretary-General of the United Nations. The current military action of the United States has crossed the line and is tantamount to aggression. We also support the Soviet Union's proposal to peacefully mediate the North Korean issue. In order to ensure that the relevant parties receive this message , I would also like to ask Mr. Panikha to send a report to the country and then pass it on to relevant parties.” At the diplomatic work conference meeting with Indian Ambassador to China Panikha, the Prime Minister said solemnly.