Blockchain developer Cheolwoo Lee (4)
Bitcoin, of course, is made up of open source. This is because it was originally created in pursuit of a transparent and fair currency.
So I was able to see the source, and I had been looking at it for a while before being dispatched here to Interpol.
And a little while ago, the Bitcoin Foundation said that it was impossible to trace the currency, but looking at the source, it seemed possible.
“Huh? What? Possible? What does that mean?”
Joe asked again.
“Oh, I just looked at the sauce for a while again, I think it’s possible.”
“……? I just got an answer from the Bitcoin Foundation saying it’s impossible?”
he asked with a puzzled expression.
“Um… is that right? Couldn’t they have misunderstood?”
“Can that be? Those are the people who are developing Bitcoin.”
Bitcoin Foundation.
Naturally, Bitcoin is a kind of program made with blockchain technology.
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Then, of course, bugs or updates could come out, and a person or organization needed to deal with them.
It was now being done by the Bitcoin Foundation.
“Um… did I get it wrong? I didn’t?”
Obviously, it seems possible.
“Oh, isn’t it?”
While tilting his head, Sangcheol spoke.
“Like what?”
“Just because it’s the Bitcoin Foundation, you don’t know everything. In a way, they’re a maintenance team, and the real developer is Satoshi Nakamoto.”
“Satoshi Nakamoto?”
“Yeah, didn’t you know? It’s the name of the person who first developed Bitcoin, but no one knows the identity yet.”
“Yes? How could that be?”
“The first place the paper was posted was on the cryptography mailing list. CML for short.”
“online?”
“uh.”
“It was first revealed online?”
Actually, I wasn’t interested in it until now.
“Uh, anyway, a user with the nickname Satoshi Nakamoto posted ‘Bitcoin: A Peer-to-Peer Electronic Cash System’ on CML.”
“That’s the beginning of Bitcoin.”
“Uh. And that person used the Tor browser to make it difficult to track the IP.”
“A browser that randomly changes its IP?”
As far as I know, I’ve heard that just using the Tor browser will get you on the US Department of Defense list. I don’t know if it’s true or not.
“Uh, so no one knows who he is.”
“hahahaha…….”
“So there’s a separate developer, and there’s a separate maintenance team. I think, but they’re not developers, so maybe they gave the wrong information.”
“Well, then I’ll try it once.”
“Yes. Probably, it’s my idea, but I think Cheol-woo’s idea is right.”
“hahahahaha, you won’t know until you try.”
“okay.”
ready to work right away.
‘Well, after all, bitcoins are created from blocks where proof-of-work is completed, right?’
Bitcoin is a proof-of-work structure in which a reward is returned to the person who solves a specific password. By breaking the password, a block is created and the remittance details are recorded on the blockchain.
All records of Bitcoin remittances were in blocks.
‘Let’s see, the block now created from the address of the genesis block… … .’
Work continued on and off.
‘Well, it’s certainly not impossible. But it’ll be a bit of a headache.’
Looking around, it was certainly not impossible. However, it was necessary to find information on all blocks and analyze where and how the bitcoins were split and merged.
‘I’m going to need a new algorithm.’
In conclusion, a new algorithm was needed to track Bitcoin.
‘I think I can do some transformation based on the C** algorithm?’
The new algorithm also had no major problems.
The C** algorithm was a pathfinding algorithm, but pathfinding was, in a sense, no different from tracking.
Of course, you won’t be able to use the C** algorithm as it is.
* * *
A few days later.
I wrote a new algorithm based on the C** algorithm and named it BS Algorithm.
Block Searching Algorithm.
If you enter a Bitcoin address, you can track where the address originated, where it went, and where it was exchanged.
The test was completed perfectly.
“It’s done. BS Algorithm.”
“huh?”
“uh?”
Sang-cheol hyung and manager Jo, who were working quietly, reacted as if they did not understand when I spoke.
“Well, did I say I was going to be tracked? To do that, I needed a new algorithm. The BS Algorithm, the algorithm that keeps track of Bitcoin.”
“…?”
“Huh? What? An algorithm that tracks Bitcoin?”
“yes.”
They didn’t seem to understand what I was talking about yet.
“Hmm…? I don’t understand, but tracking is possible?”
“Yes. If you think about it, isn’t it obvious? All transaction ledgers are stored in the blockchain. Just by analyzing them, you can find out where the bitcoins went.”
“No, of course you can know that. Yes, it’s obvious, but… that’s… do you know how much data it is?”
Manager Joe said.
“Current block number is 234,773. Average of each block is about 112kb, 26Gb.”
Data is accumulated in each block.
Approximately 230,000 blocks have been created so far, and the capacity per block is 112 kb, which is about 26 Gb.
“……You know?”
“Yes. I know.”
“So you’re saying you can analyze all of that 26Gb of data?”
“yes.”
“Do you know how big 26Gb is? You can’t think of videos like you think. It’s all binary data.”
“Ah, what do you think of me, Chief Joe? Of course I know. That much. Why would Bitcoin be Bit?
One English character is 1 byte.
If 26 GB is converted into English words, it is approximately 26.2 billion characters.
However, Bitcoin is literally a bit unit. It does not count in bytes. That meant that multiplying 262 by 8 would require analyzing 209.6 billion pieces of data.
“It’s a job that requires analyzing 200 billion pieces of data?”
“It’s 200 billion words. If you go through the process of elision, tracing, etc., it will be much less. It’s like compressing data.”
“No matter how… that’s possible?”
“Oh, really. You don’t believe it. Didn’t I show you a couple of times when I was in the army? No, it’s not like this. Come and see it now.”
Manager Jo and Sang-cheol got up and came to my seat.
「Bitcoin Searching System.」
「BitCoin Address:」
On my computer, BSS, which was made with the BS algorithm, was running.
“Now, look. I’ll try entering that address here the other day.”
I immediately entered the address I had received earlier into the program and ran it.
「Searching —– 10%」
It went up to 10% right away.
「Searching —– 21%」
「Searching —– 53%」
“It’ll be out soon. Wait a minute. It’ll take a while.”
「Searching —– 100%」
After about 10 minutes, it was completed at 100%.
「Start Address list: 19iqYbeATe4RxghQZJnYVFU4mjUUu76EA6 … … .」
「End Address list: 1Ea97SRpijSqn4AbeJzXQRsdWZJ1U2d8R8… … .」
「Check Address list: 19iqYbeATe4RxghQZJnYVFU4mjUUu76EA6 … … .」
After the program search was completed, various types of information began to be output.
“If you look here, there is a list of check addresses. Let’s see…. Is there a list of exchanges?
The next thing to do was to match the address on the checklist with the exchange address.
An exchange that actually exchanges Bitcoin for cash.
Tracking it will give you the answer.
“Of course, where are we? The International Criminal Organization said they had previously investigated the bitcoin address of the coin exchange.”
Sang-cheol hyung said in triumph.
“Then, could you look for this address? Probably, it will come out as Bitsum, a domestic exchange.”
“Let me check in a minute.”
Sang-cheol hyung seemed to go to his seat and check the address I had sent him.
After a while.
“There is! Bitsome. It’s the hot wallet address there!”
“See? Right?”
“I put the address of the drug dealer, but it came out as bitsome?”
“Of course it must be Bitsum. I heard that the drug dealer distributes it in Korea? Then there is only one Korean exchange.”
“No, that’s not it. I mean you didn’t guess that, the program found it.”
“that’s right.”
“Wow, great. Is this really trackable?”
“I’ve done everything I can in my line, but I’m not sure yet.”
“What do you mean…?”
“So, I’ll send you another address.”
I gave another bitcoin address to Sang-cheol.
“What address is this?”
“Ask Bitsome for the address. Who is using the account?”
“ah…….”
“Yes. Bitsome will have the information of the account. No one knows if they exchanged money there under someone else’s name or how they did it. From then on, it will be the capabilities of the detectives.”
All I could do was run out.
I even found out where the Korean drug dealer bought the bitcoins paid to the Philippine drug dealer. And, of course, they would have left their personal information and IP address on Bitsome.
After that, you need to track the cash flow.
That wasn’t my specialty.
“Okay. I’ll check right away.”
Several days have passed since then.
“Cheolwoo!!!!”
Manager Jo called me with a very happy voice.
“yes?”
“The Korean drug dealer was caught.”
“Oh? You got caught earlier than I thought.”
“Uh, those bastards didn’t use someone else’s name on Bitsome, and didn’t bypass the IP. Apparently, they were obsessed with bitcoin laundering.”
“hahahahaha, that’s great.”
If you do bad things, one day you will come back as a boomerang.
It was natural.
“Hey… it’s really amazing. We catch those who have been struggling for months like this in an instant.”
“hahahaha, no.”
“I was like that when I was in the army before, but really… a guy like you.”
“no.”
“You know what? What kind of guys did you catch?”
“Well? I wasn’t interested until then.”
“According to statistics, 30% of them were circulating in Korea. They were holding assets worth hundreds of billions of won.”
“Wow… Hundreds of billions? How many drugs did you sell?”
“It is said that Korea is a drug-free country, but that is compared to other countries, and the number is quite higher than I thought.”
“okay.”
“Anyway, that’s right… Lee Cheol-woo, you can think of a 30% reduction in the number of drug addicts in our country thanks to you.”
“Heh heh…… Is it really Interpol? The scale of the investigation is different.”
“Yeah, so we’re here too.”
“It’s great too.”
“What’s so great about us… Cheolwoo is not even close to your toes.”
“hahahahaha, no.”
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“That’s true, but why do real Bitcoin Foundation bastards say it’s impossible when it’s possible?”
“I’d like to go there anyway.”
“Why? Are you going to ask for that?”
“Eh~ I can’t believe it. I can’t do anything like that.”
“then?”
“In the meantime, I studied a little more. I wondered what it would be like to introduce a contract system rather than a simple currency function.”
“A contract system?”
“Hmm……. If there is such a function, should I make something like a non-fungible token and say copyright?
It was still in the idea stage.
“If it’s a non-fungible token, Non Fungible Token in English. NFT?”