저자: Ben—소속미상 · 외국인
요약 보기
비트코인 보안 방법으로 종이 지갑(paper wallet) 만드는 법을 설명하는 튜토리얼 영상이다. 한 줄 결론: 거래소에 보관한 비트코인은 실질적으로 본인 소유가 아니므로, 오프라인 콜드스토리지 종이 지갑으로 직접 보관하는 것이 안전하다. [지갑 생성 방법] - bitaddress.org 웹사이트를 파일(웹 아카이브)로 저장한 뒤, 인터넷에 연결되지 않은 컴퓨터에서 열어 주소를 생성하는 것이 가장 안전하다고 설명한다. - 화면에서 마우스를 무작위로 움직여 난수를 생성하며, 100%가 되면 주소가 만들어진다. - 종이 지갑 디자인(지폐 형태)으로 출력할 수 있고, 한 페이지당 생성 주소 수와 비밀번호(암호화) 설정이 가능하다. [보관 및 주의사항] - 공개키(QR, 주소)는 누구나 송금할 수 있는 주소이며, 개인키는 비밀번호로 보호해도 인출 권한이 있으므로 엄격히 보관해야 한다. - 여러 장 출력해 분산 보관하고, 물에 젖거나 QR이 훼손되지 않도록 주의해야 한다. 훼손 시 자금 접근이 불가능해진다. [송금 및 인출 실습] - 모바일 지갑 앱 Copay로 종이 지갑의 공개키 QR을 스캔해 소액(5캐나다달러 상당)을 입금하는 과정을 시연한다. - 반대로 개인키 QR을 스캔하고 비밀번호를 입력해 'sweep paper wallet' 기능으로 잔액(약 0.6 BTC 표시)을 Copay 지갑으로 옮기는 과정을 보여준다. [거래소 리스크 언급] - 영상 시점(2016년 8월) 전후 Mt.Gox와 Bitfinex 해킹으로 고객 비트코인이 유실된 사례를 들어, 거래소 보관의 위험성을 강조한다. [출연자 전망] - 이 영상에서는 비트코인 가격의 1~3개월 방향에 대한 구체적 예측 발언이 없고, 보관 방법과 보안에 대한 교육적 내용이 중심이다. 향후 다른 보안 방법을 다룰 예정이라고 예고했다.
다듬은 글
you make me want to leave the one I'm with start a new relationship with you this is what you do thinking all the things with you make hello everyone I am Ben with the BTC sessions I am here in CA on the island of Bali Indonesia and today I would like to talk about Bitcoin security more specifically I'm going to talk about a website called bitaddress.org it is a free website um and it's going to help you with security with uh any amount of Bitcoin you don't feel comfortable keeping just on your phone or on your computer um now it's very important and I've noted in other videos that if you do not control your Bitcoin if you are leaving your Bitcoin on an exchange technically you do not own that Bitcoin um if you'd like proof of this please take a look uh and look up an exchange called Mount gaau and more recently just in uh well by the time I post this video in the past couple of weeks bitfinex both of those exchanges were hacked and they lost people's Bitcoin that's why it's very important to store it yourself in a safe manner so bit address.org will help you create a p paper wallet for something called Cold Storage a paper wallet is just a printable Bitcoin wallet and Cold Storage means your Bitcoins are not accessible online to anyone without that piece of paper so let's get started all right let's take a look at what we're doing here first thing you are going to open up your internet browser I'll use Safari today and you're going to navigate to bit address.org now once you arrive at the website you're actually not going to do anything on it you're going to save it as a file on your computer so you're going to go up to file you're going to hit save as and you're going to save it it saves as something called a web archive all right um I'm going to save it to my desktop right now the reason we are doing this the reason we are saving this website as a file is because the most secure way to create a paper wallet is to take this file that you've created and save it and open it on a computer that has never touched the internet so perhaps taking this file putting it on a USB drive and uh and opening it on uh another computer um the reason for this is if your computer happens to have a virus on it and be infected with any sort of malware then somebody could be watching what you're doing and use that information to steal your Bitcoin from your wallet that you've just created um hopefully that would not be the case uh for today's purposes I'm just going to use my computer but what I'm going to do is I'm going to turn off my internet connection so you can see it works without any connection to Wi-Fi you can see I'm not connected there all right then I'm going to go over and click on that file that I've created bit address.org it will open in my browser just just like normal and then I'm going to jiggle around my cursor on the screen and these random points that are showing up uh they are helping create a randomly generated address for me you can doodle until it gets to 100% once it does you can see you've got a an address on the screen uh now I like to do this and make it look all fancy so I'm going to show you how if you go up and click on paper wallet you can see it gives you this awesome design here it looks just like a banknote um and in this case it's generated a few different addresses for me um but you can change that so down below you've got some options here if you look you can see something that says addresses to generate uh it had created three uh you can see addresses per page so there would be three on the page that you're looking at uh and then over here you have something that says encrypt and that just means adding a password to password protect your wallet so I'm going to create one address I'm going to have one address show per page and I'm actually going to give it a password of I love Bitcoin then I'm going to hit the button generate it takes only a moment and then you can see popping up on the screen now one address uh and this address is password uh protected so what are we looking at here over on the left this is is your address that's the QR code anybody can send money to and this is the string of characters that also represents that address when you look over on the right this is your private key and in normal circumstances if somebody had that they could spend your money but remember you've protected it with a password as well uh down at the bottom here you can just see Bitcoin amount that is so when you print it off you can jot down how much you've uh sent to this particular address uh if you want that for your own memory all right so I have printed the paper wallet that we' just made here uh this is the same wallet that you will have seen on the screen just a moment ago um it's sometimes a good idea to print multiple copies of your wallet and keep them in different locations so that if one of these were to get destroyed you have backups uh it's also a good idea to keep these in uh a safe place where they won't get wet because if the QR code here your private key were to get smudged in any way and you couldn't scan it anymore then those funds are no longer accessible to you so just make sure that wherever you do put this it's safe um what we're going to do is we're going to figure out how to send funds to this wallet and how to spend funds from this wallet so here we go I'm going to be using a wallet that I've done a video on before this wallet is called copay you can find it on the Apple iOS store and you can find it on Google Play for Android so here we go all right let's take a look at what we're doing here first thing you're going to open up your copay app once it has loaded to the main screen all you're going to do is you're going to hit this circular icon to the top right it's kind of shaded out here when you hit it that will open your camera and you're going to scan the left QR code on your wallet that is your public key next you're going to select the amount of bit coin you would like to send to this wallet today I am going to send five Canadian dollar to it nice and simple so I'm going to select my uh the number of dollars I'd like to send and I'm going to hit the send button down below this will give me one confirmation page I hit confirm and we have successfully loaded our funds onto this paper wallet now we are going to do just the opposite we are going to take the funds off of this wallet so on the top right you're going to hit your settings wheel then you're going to go to Advanced and you are going to click on sweep paper wallet once you get here there's that little square in the top right you're going to hit that that will open up your camera and you're going to scan the right QR code which is your private key and from here this is where you're going to input that password you made up before so I click and I'm going to type in I love Bitcoin once I've input that I'm just going to hit scan wallet funds and after a short loading screen it will show me exactly how much is in this wallet there we go I've got 0.6 uh it will show up in Bitcoin versus Canadian dollars uh if I want to remove those funds to my copay wallet I hit sweep wallet and right away those will be transported back to me you can see funds received popping up on my screen and I'll back my way out of all these uh additional screens and you can see there is the transaction showing that I have received my funds back into my copay wallet I hope this episode has been helpful to you I encourage everybody to at least experiment with this method of Bitcoin storage uh in coming episodes I will be looking at other methods of Bitcoin security uh until then don't forget to hit like And subscribe share this video to anybody you think could use the helpful tips and I will see you next time on the BTC sessions I don't
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