Alien civilization announced that the ability to calculate π can solve the problem of dark forests

III. Deciphering

Lin Xiang stayed on the 003 ship for four days, and he made no achievements in these four days. In the intercepted signals, except for numbers, there are no rules to be found. With all the knowledge he has learned in his life, he still can't analyze the meaning of these numbers.

All the signals sent by human beings to the black ball are like rocks in the sea, without any response. The black ball still maintains its initial state and continues to emit radio waves containing chaotic numbers. The detection device has nothing to do with it. In addition to finding out that its diameter is 1,145 meters, the new unmanned detection device equipped with a titanium alloy drill has returned, and the strength of the surface of the black ball is far beyond people's imagination.

It is impossible to take samples, and due to its "suspension" state, its weight and density cannot be estimated.

Observe the surface of the black ball through the magnification device of the detector. After zooming to a certain extent, it can clearly find that the black ball is composed of countless micron-level balls. When observing these balls, it is found that these balls are composed of smaller balls... "It's like layers of nested Russian dolls." A Japanese materials expert sighed helplessly and expressed the voices of the rest of the materials experts.

Since no alien creatures appeared from the black ball, biological experts had to look at the giant in a daze.

The irritable atmosphere enveloped the whole fleet, and some small countries couldn't help but take the lead in withdrawing. In the end, Liu Yihua accepted the instructions of the central government, gave up the idea of competing for the "right to speak" and shared the intercepted data with other countries to jointly study the cracking method. After sharing, everyone found that everything they received from each other was similar. Lin Xiang and other decryption teams sat together and formed a "super decryption group", and everyone began to analyze the situation.

"Is it scaring us? I don't know where the hell it came out, just send us a bunch of messy numbers?" American mathematicians cursed that he had never been to the sea before. In the past few days, he was sick on the boat and had diarrhea, and his physical strength was seriously overdrawn.

"We can't crack it." Another cryptographer from Europe said in frustration, "I tried to compile these numbers with RSA, SHA algorithm, and I can't even read the resulting text myself."

"I think that as long as we are given some more time, we can always find clues. Now everyone has no clue, because it's too hasty." A Chinese military researcher comforted other researchers and said, "There is great uncertainty in cracking the password itself. My tutor once said that generally speaking, it will take at least 10 years to crack an advanced password after it is designed."

"Well, 10 years." Another researcher sneered, "That's just a password based on the design time of 8 years, and I don't know how many years this big black ball has floated in the universe."

Lin Xiang, who had been silent before, stood up and said, "Everyone seems to have fallen into a misunderstanding just thinking about these numbers from the perspective of encryption algorithms. First of all, it jumped into the earth and caused no harm to anyone, didn't it?"

Everyone calmed down, and Lin Xiang continued to say, "Then it also used radio communication specially. Obviously, it wanted to have some contact with us. And the communication is encoded as ASCII, which can be inferred that it reads our technology and sent it to us in the form of imitation.

Lin Xiang sat back in his seat and said, "I didn't sleep for two days and two nights. I thought about it over and over again, and I always felt that it didn't mean to embarrass us at all. I think it doesn't send a password at all, but a clear code.

"A clear code? How is it possible?"

"If it is clear, what can it express?"

"Absurd!"

The scene fell into chaos again. Lin Xiang suddenly felt very uncomfortable, and the discussion with this group of people made his hard-won thoughts confused again. After a few days of continuous thinking, he has been exhausted for a long time, and now he just wants to find a clean place to have a good sleep. So he ignored the contemptuous eyes of others, rolled up his coat on the back of the chair, and quickly walked out of the conference room.

The narrow rest room in the ship made him feel claustrous, and he chose to take the elevator to the top deck. At this time, it was early morning, and the fresh sea breeze had a little fishy smell, silently and gently brushed his cheeks, which gave him an indescribable sense of comfort in his heart. Lin Xiang looked at the head of the ship. The big black ball was still standing, casting a long dark shadow on the sea. Staring at the big black ball for a long time made him feel depressed, so he turned around and looked far in the opposite direction of the big black ball. The clear sea water rippled soothingly in the light golden morning light, reflecting the shimmering light. Many ships floating on the ocean were also covered with a hazy halo.

Lin Xiang's thoughts were just relaxed and disturbed again. An Indian mathematician wrapped in a headscarf caught up with him, grabbed his shoulder, and kept shaking his head and muttering a lot. Lin Xiang didn't bring a translator and didn't know anything about Hindi. When the other party saw Lin Xiang's face, he immediately changed to English, but his English level did not dare to compliment. The strong Indian accent made Lin Xiang laugh and cry.

There has been no well-known mathematician in India for more than 20 years, and the scholar in front of him is also the lowest ranked person in this seminar group. Lin Xiang sighed and sighed when India can produce another person like Srinivaser Ramanujan [1].

Thinking of Ramanujan, it seemed that the sleeping person was suddenly awakened, and Lin Xiang suddenly flashed in his mind. He shouted "thank you" to the Indian scholar, and then flew to the hatch, completely ignoring the Indian scholar's in-the-place. Lin Xiang returned to the computer room to take part of the data, then entered several lines of formulas on the computer, and entered the data. The result made Lin Xiang ecstatic. He shouted loudly and rushed into the conference room, interrupting everyone's conversation:

"Don't bother to think about cracking the password! There is no encryption at all! This is the value of π!"