저자: CésarGaitán—소속미상 · 외국인
요약 보기
이 영상은 투자 조언이 아니라 비트코인 종이지갑(paper wallet) 생성·보관 방법을 설명하는 기술 교육 영상이다. 비트코인은 중앙기관이 통제하지 않는 탈중앙 디지털 화폐이며, 개인이 직접 자산을 소유하고 24시간 어느 금액이든 송금할 수 있다는 점을 장점으로 소개한다. 종이지갑은 비트코인 주소(공개키)와 개인키가 인쇄된 종이로, 콜드스토리지(cold storage) 방식이다. 주소는 은행 계좌번호에, 개인키는 비밀번호에 비유된다. 종이에 인쇄된 QR 코드가 두 키의 정보를 담고 있다. 개인키 생성 과정은 SHA-256 알고리즘과 Unix의 shasum 도구로 임의의 단어를 해시해 만드는 방식으로 시연된다. 공개키는 개인키로부터 계산할 수 있지만 그 역은 불가능하다고 설명한다. 자금 입금은 Bitso, Volabit 같은 국내외 거래소에서 페소를 비트코인으로 환전해 공개 주소로 보내는 방식이다. 입금 확인은 blockchain.info에서 한다. 인출을 위해서는 개인키를 가져와 디지털 지갑에 import해야 하며, 키 생성은 인터넷 연결 없이 오프라인으로 가능하다고 강조한다. 결론적으로 투자 전망이나 가격 예측은 없고, 보안·키 관리 중심의 기술 설명이다. 리스크 측면에서 개인키를 잃어버리거나 종이가 노출되면 자산을 복구할 수 없으므로 보관에 주의해야 한다는 점이 내포되어 있으나 영상에서 명시적으로 경고하지는 않는다.
다듬은 글
원문은 영어 자동자막입니다. 아래는 음성인식 오류를 바로잡고 읽기 좋게 다듬은 영어 본문입니다.
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Today we'll talk about Bitcoin and how, with this technology, through a series of words we'll remember, we can move any amount of money. My name is César Gaitán, and this is HackWise.
Bitcoin is a decentralized digital currency. It isn't controlled by any central entity, unlike the Mexican peso, which is controlled by the Bank of Mexico.
One of the advantages of being decentralized is that, since no one controls it, you own your own money. There's no intermediary. On top of that, you can transfer any amount of money 24 hours a day, 365 days a year.
The first thing we're going to do is understand what a paper wallet is, because it's the basic foundation of today's experiment.
A paper wallet is, as its name suggests, a piece of paper on which we can store Bitcoin. This is known as cold storage, or a cold wallet. The paper contains a private key and a public key. To create your own paper wallet, you can go to bitcoinpaperwallet.io. All you have to do now is print it, cut it out, and you'll have your paper wallet.
This QR code is exactly the same as this code here. This key is a Bitcoin address, which starts with a "1" or "3". Now you might be wondering: how can I withdraw the funds once I deposit them here? The Bitcoin address is like a bank account number. That's what this folded part is for.
The private key is nothing more than the password or PIN for a bank account, for example. With this information, we can access the funds on this paper. The QR code here is exactly the same as the key here.
What we're going to do next is calculate a Bitcoin private key. It's nothing more than text encrypted with an algorithm called SHA-256. To create our private key with the SHA-256 algorithm, all we do is use `sha256sum`, a utility included in any Unix system, and pass it the words we want to use to generate the key.
Now that we have the private key, we need to find the public key, which is what lets us send money to that address.
With Bitcoin, as long as you have a private key, you can calculate the public key, but never the other way around. The interesting part is that we use a tool to calculate the public key from the private key. Now that we have the private key in the proper format, we'll go back to Bitcoin.
Once we've calculated the public address, all we need to do is send it bitcoins. We have several options. The one I recommend is using a digital exchange, such as Bitso or Volabit. On these platforms, you go to the website, fund your account, and then, once you have the funds, exchange your pesos for bitcoins.
Once you have the bitcoins, you send them to the public Bitcoin address you calculated earlier. After that, we'll go to Bitso to buy the bitcoins we want to send to our address. We can verify that the bitcoins have arrived by logging into blockchain.info.
When you reach your destination, reopen your computer's terminal, enter the text, calculate the SHA-256 hash, and obtain the private key. Then import that private key into a Bitcoin wallet, and you'll have access to the funds, so you can recover the bitcoins we've stored in our brains.
We'll need a digital wallet for this. In this case, we used blockchain.info.
One very striking thing is that you can generate the public and private keys completely offline. You don't need to be connected to the internet. You can download any source code from a Bitcoin address generator and do it that way. This makes the procedure completely secure.
Getting back to what this channel is about, which is Bitcoin security, cryptocurrencies, and technology, I'll leave you with today's question: If you could do anything you wanted, hack anything, what hack would you do? Leave your answer in the comments. I want to hear from you and know what would catch your attention.
That's all for today's video. If you liked it, don't forget to subscribe to this channel. My social media links are below: Twitter and Facebook, so we can chat every day. I hope you enjoyed this video. Don't forget to like it. Until next time!
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