It had been a few days since the conversation with An Wan, and Lu Hai finally received a notice from Chu He.

Chu He sent himself a ciphered message, using a password.

To be honest, Lu Hai was a little confused, he knew that Chu He should have sent him the address of the meeting, but Lu Hai and he did not agree on the password breaking method in advance, so Lu Hai had a headache.

It seems that Chu He must be sure that Lu Hai will be able to decipher this message.

Lu Hai felt that Chu He should be testing his professional ability, but Lu Hai felt very helpless, he didn't have any research on passwords.

So Lu Hai called An Wan over. Start the process of decryption.

Chu He's password is like this:

10010011100001111001001000100111010100

It looks like a binary number, because Anwan is a hacker and the first thing that comes to mind is binary.

So Lu Hai and An Wan translated these numbers into decimal numbers, and the result is as follows:

158408673748

It looks like a string of phone numbers, but it's one digit more than a phone number, so it shouldn't be.

Lu Hai thought for a while and said, "Could it be that you have converted numbers into letters?" ”

An Wan thought that it should be the same, so he did a step of calculation and got the following results:

tsu

mzqa

The result is out, but it still looks like a string of garbled characters, which makes no sense.

Lu Hai and An Wan were a little anxious, shouldn't they, what did Chu He want to express to them.

Lu Hai wondered if it would be a reversal of this string of garbled codes.

He remembered that in Verne's novel "Journey to the Center of the Earth", the protagonist talked about the numbers being reversed, and then the mystery was revealed.

So Lu Hai picked up a pen and paper, talked about the upside-down numbers and wrote them down.

Here are the results:

aqzm

ust

Then, then Lu Hai was out of line, this is still a string of garbled characters!!

What the hell does Chu He want to do?!

Lu Hai was a little discouraged, he really wasn't good at decryption, and he said to An Wan: "Do you want me to call Chu He directly, I really can't solve it." ”

An Wan looked at the password in a daze, but after hearing Lu Hai's words, he immediately shook his head and said, "No, he sent the password here maybe because he was monitored, and now we can only decrypt it, there is no other choice." ”

Lu Hai scratched his hair and complained: "But there was no agreement on the password before, how did he know that we must decipher it?" ”

An Wan thought for a moment and said, "I didn't have contact in advance but I think you will be able to decipher it, which shows that he thinks that this encryption method is very simple and common, and it is a well-known encryption method." ”

Lu Hai patted his head and said, "You mean, Morse code!?" ”

Ann Wan nodded.

Lu Hai said: "Then what are you waiting for, try it now." ”

Lu Hai threw away the previous scratch paper and started writing again.

The original password is 10010011100001111001001000100111010100, if it corresponds to the Morse code, then "1" should represent the "-" in the Morse code, and "0" should represent "*".

After translation, the result is as follows:

-**-**---****----**-**-***-**---*-*-**

Because the Morse code is too common, Lu Hai has been trained to prepare, and there is no need for a code book, and Lu Hai translated these long and short signals against the scratch paper.

Here are the results:

NAIMNIJNAFIDOAL

Lu Hai found that the letters this time were regular, with three "N" and three "I", which didn't seem to be garbled.

But, well, Lu Hai still doesn't know what it means!!

Lu Hai felt like his brain was going to explode, what the hell was this.

An Wan said: "Will it be the fence encryption next, there are fifteen letters, ah, it is possible." ”

Lu Haidao: "No matter, let's try it first." ”

According to the way of fence encryption, Lu Hai and An Wanjian decomposed a string of letters into groups of three and three, and the result after arranging them is as follows: NAI

MNI

JNA

FID

OAL

Lu Hai and An Wan looked at each other the same, and they could see their confusion from their eyes.

An Wandao: "What to do next?" ”

Lu Hai scratched his hair again, he would have this habit every time he was thinking about a problem.

However, after catching it, I still don't have a clue!

Lu Hai said: "First of all, I think the Morse code must be right, you look at this string of letters, it is really regular. We should have taken a few steps right, and all that remains is to know the encryption method of the Morse cipher, and we don't know which encryption method Chu He will use. ”

An Wan said: "Did you find a problem, Chu He didn't give even the slightest hint, he just sent a string of binary numbers." ”

Lu Hai thought for a while and said, "This shows that this encryption method should be very simple, and it should not be fence encryption." ”

"What about computer keyboard encryption or mobile phone keyboard encryption ······?"

"It's also unlikely, otherwise Chu He will have a hint."

"Then when you think about it, there is no other common way to encrypt."

The two looked at each other and said in unison: "It means that this is the final password!" ”

So why is it still in garbled form?

Of course, it's going to be reversed!

So Lu Hai and An Wan hurriedly wrote the password backwards, and the result was as follows:

LAODIFANJIANMIAN

Replace it with lowercase:

laodifa

gjia

mia

It seems to be super regular, but Lu Hai and An Wan are in trouble again.

"I thought it would be a string of English, but what are these?"

Lu Hai said that he didn't know, but this string of letters was really familiar. This arrangement of land and sea feels like where has I ever seen.

But where?

Suddenly, Lu Hai had an idea and said to An Wan: "Where is this?" ”

An Wan didn't understand what he meant, and said, "Why are you asking this, this is Dongchun!" ”

Lu Hai waved his hand and said, "No, I didn't mean that, I mean, which country is this?" ”

An Wan looked at Lu Hai with idiotic eyes, and said, "Then you don't need to ask, of course it's ······ here."

An Wan suddenly thought of something, his eyes widened, he looked at Lu Hai, and said, "This is ······, Huaxia!" ”

"Yes, Huaxia, so ······"

"So this should be pinyin!"

Lu Hai nodded, and An Wan hurriedly entered this string of letters on the computer using the pinyin input method.

What I got turned out to be - the old place to meet.

Lu Hai and An Wan breathed a long sigh of relief and said, "It's finally cracked." ”

An Wan looked at the sentence on the computer and said, "Where is the old place?" ”

Lu Hai kicked An Wan and said, "Then do you still want to ask?" Of course, it's the same place we last met! ”

The two of them quickly packed their things, especially their weapons and equipment.

Drove to the downstairs of the hotel, and Lu Hai entered the door. I still came to the midnight sun room.

Anwan went to the old place to get ready for sniping.

opened the door of the private room, and Chu He was indeed inside.

But a person who Lu Hai didn't expect was actually here!