81. Neon Nineteen
It was last night.
After eating Baek Il-ju and pizza at Yoon Sung Soft’s office, Yoon Seok-yi drove me and In-cheol to the apartment in Namseo-dong, and In-cheol told me as soon as he got out of the car.
“Jeong-ho, if you’re hacking ＜Shield Safe>, please wear it too.”
I said with a smile at Incheol’s words.
“Anyway, I did that to ask you to do it together.”
“okay? really?”
I nodded and said.
“It’s no fun if I do it alone. And hacking is my teacher, so I can’t do it alone!”
“Ahem! Well then! Show off your humble talent in front of this master. Whoa heh—-.”
After speaking, Incheol giggled and laughed for a while.
“What? are you drunk?”
“okay? is this drunk But why do you keep smiling like this? this is amazing Whoa heh–!”
After laughing for a while, In-cheol said to me.
“By the way, from what you’re saying, it sounds like you have a plan. How far are you planning to hack?”
“To break through the server administrator account.”
In-cheol’s expression, which had been grinning with a shriveled face at my answer, became serious.
“What? Really? Is that possible?”
I nodded my head without saying a word, and Incheol sighed deeply and said.
“her—! I raised a tiger cub, a tiger cub!”
When Incheol finished speaking, he started to giggle and laugh again.
Incheol, this guy… To get so drunk with just one can of beer… .
* * *
In-cheol’s message arrived when I said that I was ready.
-OK! I was waiting. So should I plant it now?
‘If malware is planted, how long does it take for the server to recognize and delete it?’
– Originally, it should be deleted immediately, but ＜Shield Safe> searches for malicious code a bit slow. As short as 1 hour. About 2-3 hours at most?
I checked the watch.
4:15 in the morning.
President Myung-soo Jung wakes up and starts work at 5 a.m., and the first thing the president of an IT company does in the morning must be checking his e-mail.
That means he has about 45 minutes left before he logs into his email.
I sent a message to Incheol.
‘Then plant them now.’
After a while, Incheol’s message came in.
– planted.
Malicious code planted by Incheol on the datafield server.
It was the code that monitors the inbound traffic coming into the server and reads the signal of the traffic as needed.
If it is daytime, it will be difficult to check the traffic coming into the server one by one.
But now, it is early in the morning when the connection is scarce, so it is possible to check the contents of the signal.
I sent a message to Incheol.
‘Send the incoming string at 4:19:30.’
-Okeydokey!
Incheol and I had our watches set in seconds.
I accessed the homepage provided by the data field server, opened the login window, and entered the following.
ID: helloworld
Password: abbcddeffg
And exactly at 4:19:30, I pressed the login button, and a message came back saying that the ID and password did not match.
Like most other cryptosystems, the RSA cryptosystem also uses formulas.
This means that for the RSA cipher to work, every character must be primed to a number.
In the case of ＜Shield Safe>, this process is done by the conversion table developed by Shield.com, and this conversion table is also known to change periodically.
It is a double security device.
I just entered the string abbcddeffg as my password, in order to figure out how none of this string is converted to a number.
After a while, a series of strings, that is, a number in base 64, came through Incheol’s message.
I converted it using the D value, which is the key to unlock the string sent by Incheol, and the following number came out.
3217179662756562
In other words, this number is the converted number from the abbcddeffg that I entered as the password.
However, there is one minor problem here.
The problem is that it is not possible to know whether the converted number of a, the first character of the password, is 3, 32, or 321. For this purpose, repeated characters are inserted in the middle of the password.
In other words, it is possible to rewrite a space as follows by using a character repeated twice.
32 17 17 9 6 6 27 56 56 2
And this number conversion table is created.
a -> 32
b -> 17
c -> 9
d -> 6
e -> 27
f -> 56
g -> 2
I repeatedly entered a password consisting of different letters and numbers, and Incheol sent me the number received from the server.
When I completed the conversion table for the alphabet and numbers in this way, the clock showed 4:45.
read at noblemtl.com
Now, we have to wait for President Jung Myung-soo to log into the server.
I sent President Jung’s ID to Incheol and said.
‘Now, send me the string coming into the server with the ID of jmsoo.’
The string that comes with the ID is the encrypted password.
-OK. But are you sure the login time is 5 o’clock?
‘Perhaps it will. That’s when I said I’d start working right away from home.’
While waiting for Incheol to contact me, I opened my internet browser and checked the news section of the portal.
At the top of the news section, an Internet article caught my eye.
＜Issuing an arrest warrant for So Su-jeong>
While reading the article by clicking on the news, Incheol received a message.
The password of President Chung Myung-soo was an encrypted 64-base string.
The RSA password was decrypted using the D value, which is the unlocking key, and when the numeric conversion table completed a while ago was applied, the original password of President Jung came out.
By the way… President Jung’s password is a bit strange.
Could this one… is it starlight?
I sent a message to Incheol.
‘thank you! I succeeded. Now delete the planted code.’
-Did you really get the password? Are you sure?
I don’t know if I’m 100% sure.
This is because it is possible that CEO Jung Myung-soo entered the wrong password.
The way to check if this is correct is to log into President Jung’s account now.
But then the log-in record is left.
All I have to do is show that there is a hole in the datafield server security.
There is no need to access President Jung’s e-mail account.
And that’s the accounts of our potential customers.
I answered Incheol’s question if he was sure he had found the password.
‘Perhaps for sure. Unless President Jung entered the wrong password.’
-Is that really possible?
‘I’m sleepy. Stop asking questions now. I’m going to be busy tomorrow.’
-I’m watching a nonsensical hacking incident in real time, are you starting to fall asleep? What the hell did you do?
‘I was just lucky.’
After finishing the messenger conversation with In-cheol, I wrote an email to Yoon-seok-hyung.
+ +
Yoon-seok’s older brother.
Please inform Datafield President Jung Myung-soo that we have breached the ＜ShieldSafe> security system.
When President Jung asks if it’s true, just say ‘vmfhxhtmakstp1234’.
+ +
I checked the time.
5:40 in the morning.
The tension was relieved and I was drowsy, and I turned off the computer and laid down on the bed.
“Jeong-ho!”
I woke up to my mother’s voice from the living room, and immediately checked my watch.
9:15 am.
I said to the living room.
“Yes, Mom!”
“Are you awake? Pick up the phone.”
I went to the living room and answered the phone, and I heard Yoon Seok-yi hyung’s urgent voice.
– It’s Jeongho! can you come to yunsung soft office now?
“I just woke up and it’s going to take a while, what’s going on?”
-CEO Datafield Jung is now in our office.
“ah… ! Really?”
I expected that the data field would be turned upside down, but did you come to the office of Yunseong Soft?
It’s not that the employee was sent, but the boss came directly?
– They say you’ll be waiting here until you come, but I think you’d better come as soon as possible.
“Okay, then I’ll leave right now.”
I left the house and headed to the bus stop, and the newspaper on the stand caught my eye.
＜Prediction of major announcement by So Su-jeong>
I picked up the newspaper and paid for it, got on the bus and opened it.
At the same time as last night’s arrest, reporter So So-jeong was fired from the Daedong Ilbo.
The apparent reason was a violation of the duty to maintain dignity, but it is said that the Daedong Ilbo fired reporter Sojung, who felt burdened by the boycott and article rejection movement.
And in the process of being transferred to the Seoul Detention Center, reporter So-jung said this to the reporters who followed him.
As long as this happens, he will not die alone, and sooner or later he will make a major announcement that will shake the country.
A major announcement that will shake the country?
What the hell are you making an announcement?
When the newspaper was turned to the next page, a newspaper editorial appeared.
The editorial, which started with the sentence ‘I am proud of our journalists who are steadfastly overcoming the current media oppression’, led to a sharp criticism of the article-type advertising bill, and the last… It ended with a slightly bloody sentence, ‘I am sending an ultimatum to two lawmakers who are still insisting on proposing the article-type advertising bill’.
Yoon Sung Soft.
As I entered the office, President Myeong-soo Jeong stood up from his seat with a welcome expression and said,
“Isa Chae, welcome.”
come to me… ?
Isn’t this the main subject changed?
but… We are in a situation where we have to go to the data field office to do business, but since the data field side came to our office, it is true that the main customers have already changed.
“hello. Sorry to keep you waiting.”
“no. While waiting, I heard from CEO Cho about Michael Security and the specific contract terms.”
At President Jung’s words, I looked at Yoon Seok-hyung, and Yoon Seok-yi raised his thumb toward me.
Judging from his brother’s expression, it seems that the story of the Michael Security contract is going well.
President Jung spoke to me in a serious voice.
“But how did you find the problem with ＜Shield Safe>?”
I said with a perplexed look.
“It’s our Yunseong soft know-how, so it’s a bit hard to say.”
President Jung nodded his head with a look of understanding at my answer.
“It would be. So, let me change the question. Was the shield bad? Or was the window good?”
“yes… ? What does that mean?”
“When the president’s account has been hacked, it’s not a minor issue, it means that the security system has been completely disabled… I want to know if this is a problem with ＜Shield Safe> or if it is because of Yoon Sung Soft’s hacking ability.”
My honest answer is the latter.
In other words, it is not a problem with ＜Shield Safe>.
The reason ＜ShieldSafe> became my target was because ＜ShieldSafe> is a security system based on the RSA encryption system.
Although I managed to hack it, RSA is a really good cryptosystem, and Michael Security is also built on top of a modified RSA.
read at noblemtl.com
Not only this.
The RSA encryption algorithm will be used more widely than it is now, as the patent is released and the source code is released in 2000, a year later.
The encryption system that was used without any problems even in 2020, when I died in the past life, was the RSA encryption.
RSA is a great cryptosystem.
In response to Mr. Jung’s question, I said:
“To be honest, it’s not about ＜Shield Safe>.”
In response to my answer, President Jeong nodded his head without saying a word, and a disappointed expression passed over Yoon Seok-yi hyung’s face.
Unless it was a problem with ＜Shield Safe>, there was no reason for Jung to change the security program.
After a moment of silence, President Jung opened his mouth.
“Then it is the hacking ability of Yun Sung Soft. Also… My guess was right. ha ha ha—!”
After laughing for a while, President Jung said to Yoon Seok-yi hyung.
“CEO Cho, signing a contract with Michael Security.”
“… .”
“Can I put a condition on that?”
“Condition… Isn’t it?”
“I tend to have a terrific smell of money. I would like to invest in Yunseong Soft in Datafield, so let’s make an investment contract together.”