Uploaded November 2021 | Updated September 2026, 10 minutes ago
What is 2-factor authentication (2FA) and why is it important? Authentication means proving who you say you are; 2FA means using two distinct characteristics to prove you are who you say you are. Authentication is an important security feature for everyone using computers, and is vital to understand when holding bitcoin, ether, and other cryptocurrencies. If you hold cryptoassets (Bitcoin, Ethereum, Monero, etc), you need to know about multi-factor authentication.
Learn more in this Q&A from Andreas M. Antonopoulos.
Chapters
0:00 What is Two-factor authentication? (2FA)
0:24 Multifactor authentication as one of three things. The first possible factor you can have is something you know.
1:16 The second factor is something you are.
1:53 Biometric factors have advantages/disadvantages.
3:12 The final factor is something you have.
4:57 No single factor authentication is sufficient on its own.
6:09 What if I lose my yubikey?
7:45 2FA - Something you know, something you have, and something you are
8:33 Hardware base multifactor device - U2F
#2FA #CryptoSecurity #MFA
COMMENT below and let us know what you think of the video. Post your follow-up questions there too!
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LEARN from Andreas in one of his popular Workshops which will teach you practical crypto skills. There’s even a FREE Intro to Bitcoin & Open Blockchains to get you started. aantonop.io/takeaworkshop
You can also learn from one of aantonop's many books about bitcoin, ethereum, and open blockchains. Andreas has written three technical books for developers about blockchain technology, Mastering Bitcoin, Mastering Ethereum, and Mastering the Lightning Network published by O’Reilly Media. He’s also written The Internet of Money Series books, which explain why bitcoin, ethereum, and open blockchains matter.
About aantonop: Andreas isn't promoting a company or an organization; he's paid by the community (people who support this work on Patreon and YouTube) and provides an unbiased look at open blockchain technologies, what they can do for our societies, and how to get involved (if you decide you want to). Learn more at aantonop.com
From Andreas: You may already know that my mission is to educate as many people as possible about #Bitcoin and open blockchain technologies. Watching these videos and sharing them with others is a big part of that. Thank you for being part of this mission.
***Learn More From Andreas**
Amazon & Kindle: amazon.com/-/e/B00MVAG8Z8
Audible: audible.com/author/Andreas-M-Antonopoulos/B00MVAG8Z8
E-books & Merch: aantonop.io/shop
Patreon: patreon.com/aantonop
Website: aantonop.com
Workshops: aantonop.com/workshops
***Connect with Andreas on Socials***
Facebook: facebook.com/AndreasMAntonopoulos
Instagram: instagram.com/amantonop
LinkedIn: linkedin.com/company/aantonop
Twitter: twitter.com/aantonop
Thanks for watching, sharing, and subscribing!
What is 2-factor authentication (2FA) and why is it important? Authentication means proving who you say you are; 2FA means using two distinct characteristics to prove you are who you say you are. Authentication is an important security feature for everyone using computers, and is vital to understand when holding bitcoin, ether, and other cryptocurrencies. If you hold cryptoassets (Bitcoin, Ethereum, Monero, etc), you need to know about multi-factor authentication.
Learn more in this Q&A from Andreas M. Antonopoulos.
Chapters
0:00 What is Two-factor authentication? (2FA)
0:24 Multifactor authentication as one of three things. The first possible factor you can have is something you know.
1:16 The second factor is something you are.
1:53 Biometric factors have advantages/disadvantages.
3:12 The final factor is something you have.
4:57 No single factor authentication is sufficient on its own.
6:09 What if I lose my yubikey?
7:45 2FA - Something you know, something you have, and something you are
8:33 Hardware base multifactor device - U2F
#2FA #CryptoSecurity #MFA
COMMENT below and let us know what you think of the video. Post your follow-up questions there too!
SUBSCRIBE to this YouTube channel and select the bell 🔔 for notifications: youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ?sub_confirmation=1
JOIN this YouTube channel about Bitcoin and open blockchains to become a YouTube Community Member and access custom emoji and other perks: youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ/join
BECOME a Community Builder: patreon.com/aantonop
LEARN from Andreas in one of his popular Workshops which will teach you practical crypto skills. There’s even a FREE Intro to Bitcoin & Open Blockchains to get you started. aantonop.io/takeaworkshop
You can also learn from one of aantonop's many books about bitcoin, ethereum, and open blockchains. Andreas has written three technical books for developers about blockchain technology, Mastering Bitcoin, Mastering Ethereum, and Mastering the Lightning Network published by O’Reilly Media. He’s also written The Internet of Money Series books, which explain why bitcoin, ethereum, and open blockchains matter.
About aantonop: Andreas isn't promoting a company or an organization; he's paid by the community (people who support this work on Patreon and YouTube) and provides an unbiased look at open blockchain technologies, what they can do for our societies, and how to get involved (if you decide you want to). Learn more at aantonop.com
From Andreas: You may already know that my mission is to educate as many people as possible about #Bitcoin and open blockchain technologies. Watching these videos and sharing them with others is a big part of that. Thank you for being part of this mission.
***Learn More From Andreas**
Amazon & Kindle: amazon.com/-/e/B00MVAG8Z8
Audible: audible.com/author/Andreas-M-Antonopoulos/B00MVAG8Z8
E-books & Merch: aantonop.io/shop
Patreon: patreon.com/aantonop
Website: aantonop.com
Workshops: aantonop.com/workshops
***Connect with Andreas on Socials***
Facebook: facebook.com/AndreasMAntonopoulos
Instagram: instagram.com/amantonop
LinkedIn: linkedin.com/company/aantonop
Twitter: twitter.com/aantonop
Thanks for watching, sharing, and subscribing!
![Paper wallets, inflation, criminals using bitcoin and...Bitcoin & Open Blockchain Livestream [2021]](https://i.ytimg.com/vi/MbwLVok4gWA/mqdefault.jpg "Paper wallets, inflation, criminals using bitcoin and...Bitcoin & Open Blockchain Livestream [2021]
Looking for an entertaining, trustworthy, unbiased opinion on bitcoin and open blockchains? This is it. In this Livestream, aantonop answers your questions!
0:00:00 Waiting
0:02:17 Introduction
0:05:00 Which multisig setup can you recommend for holding life-changing amounts of bitcoin? Details on Software / Hardware combinations would be much appreciated. Thanks! [brewcat]
0:10:55 How can I verify that my hardware wallet is sending the money to the address it shows on the display? And in reverse, how can I be sure that a receive address shown by my wallet is actually controlled by me? [Gaston]
0:13:56 Blockchain surveillance companies release reports detailing how much criminal funds are moved using cryptocurrency. Their number is low (about 0.5% of all crypto transactions) but how on earth could they track this data? [Vlad from London]
0:18:20 Non-criminal uses of money: Aantonop shop speak, workshops and free content
0:20:00 Back to basics: what were the major (existing) innovations that made bitcoin possible? [Mikael Holmstrom]
0:25:25 Thank you to Patreons
0:27:39 Could you briefly explain the technical differences between a sidechain (e.g. Liquid) and a Layer 2 solution (e.g. Lightning Network)? [Mr Hearts]
0:33:37 I know you are not an economist but could you explain in simple terms what a deflationary system is and how it relates to an inflationary system? What are the pros and cons? [G]
0:38:25 What are token burns? Why are they necessary in the first place? What do they accomplish? [Lucia aka Dancing Crypto]
0:40:20 Down The Rabbit Hole - Paper Wallets [aantonop]
0:47:12 What is the best way to get funds out of a paper wallet and move it to a hardware wallet?
0:48:53 How do I explain benefits of open blockchain to my friends who still dismiss it by calling it boomer political labels like libertarian ponzi scheme
0:51:14 First timer here (taking your crypto wallet course) I want to start into Bitcoin / Crypto by selling my paintings. How is the best way to go about this? [Oswald]
0:54:36 Is it possible to explain Dai stablecoin within 60 seconds? If so, will you try?
0:57:03 that was way more than sixty seconds... fail
0:57:30 Upcoming events
0:59:06 Post-Taproot - what is the next big innovation in Bitcoin? [Tomer]
0:59:57 Do you think the recent corporate interest in using bitcoin as a reserve asset to prop up balance sheets represents a step toward commercialization similar to what happened with the internet or will it be a poison pill? [CryptoWoke]
1:01:13 I want to use Electrum instead of Trezor or Ledgers wallet software for my HW, but it seems I need to use their software to initialize the HW and update the firmware (losing privacy?). Is there an option to note use their software at all? [Anita]
1:02:20 What is the best video on your channel to suggest to someone who is skeptical about bitcoin?
1:03:17 How likely is the next hack of TheDAO scale? Over time does the Ethereum VM become more resistant to human errors in smart contract code? [Vlad from London]
1:05:25 I know its out of todays topic, but Id like to know what would be the best platforms to prepare the Income Tax Report regarding cryptos [Guillaume]
1:06:48 Id love to get a hardware wallet... sounds dumb but computer technology changes over time... no cd drives, etc. Are you at all worried the USB port may be updated over time and you can then have a hardware wallet you cant use? [Justin]
1:09:20 Wrap-up & thanks
BECOME a Patreon Community Builder: https://patreon.com/aantonop
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You may already know that Andreas’ mission is to educate as many people as possible about Bitcoin and open blockchain technologies. Participating in these Livestreams is one way to do that. Thank you for being part of this mission!
Last months livestream: https://youtu.be/ZsIC7H4s-KA
About aantonop: Andreas isnt promoting a company or an organization; hes paid by the community (people who support this work on Patreon and YouTube) and provides an unbiased look at open blockchain technologies, what they can do for our societies, and how to get involved (if you decide you want to). Learn more at https://aantonop.com
***Learn More From Andreas’ Workshops, Books & Events**
Amazon & Kindle: http://www.amazon.com/-/e/B00MVAG8Z8
Audible: https://www.audible.com/author/Andreas-M-Antonopoulos/B00MVAG8Z8
E-books & Merch: https://aantonop.io/shop
Patreon: https://patreon.com/aantonop
Website: https://aantonop.com
Workshops: https://aantonop.com/workshops
***Connect with Andreas on Socials***
Facebook: https://www.facebook.com/AndreasMAntonopoulos
Instagram: https://www.instagram.com/amantonop/
LinkedIn: https://www.linkedin.com/company/aantonop/
Twitter: https://twitter.com/aantonop
Thanks for watching!")
![Investing in DeFi? You Need to Know the 5 Categories of Risks Youre Facing [2021]](https://i.ytimg.com/vi/OxNXBhmtDrw/mqdefault.jpg "Investing in DeFi? You Need to Know the 5 Categories of Risks Youre Facing [2021]
DeFi has become the darling of the cryptocurrency industry over the past year. So lets talk about the 5 categories of risks you face when investing in DeFi. Watch and learn.
Chapters
0:00 What are the risks with DeFi?
0:39 Financial risk
1:59 Counterparty risk
2:38 Contract risk (primary and secondary contract risk)
5:09 Platform risk (conditions on the platform and vulnerabilities)
7:00 Compound risk
This video is part of the DeFi livestream in March 2021, where Andreas answered your questions related to Decentralized finance. Watch the whole video here: https://youtu.be/TAKZD1txBmI
Related Videos
DeFi Tokens & Risks - https://youtu.be/fAYcSfYo3FM
Token Burns - https://youtu.be/vpqyxBejUK8
COMMENT below and let us know what you think of the video. Post your follow-up questions there too!
SUBSCRIBE to this YouTube channel and select the bell 🔔 for notifications: https://www.youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ?sub_confirmation=1
JOIN this YouTube channel about Bitcoin and open blockchains to become a YouTube Community Member and access custom emoji and other perks: https://www.youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ/join
BECOME a Community Builder: https://patreon.com/aantonop
LEARN from Andreas in one of his popular Workshops which will teach you practical crypto skills. There’s even a FREE Intro to Bitcoin & Open Blockchains to get you started. https://aantonop.io/takeaworkshop
You can also learn from one of aantonops many books about bitcoin, ethereum, and open blockchains. Andreas has written three technical books for developers about blockchain technology, Mastering Bitcoin, Mastering Ethereum, and Mastering the Lightning Network published by O’Reilly Media. He’s also written The Internet of Money Series books, which explain why bitcoin, ethereum, and open blockchains matter.
About aantonop: Andreas isnt promoting a company or an organization; hes paid by the community (people who support this work on Patreon and YouTube) and provides an unbiased look at open blockchain technologies, what they can do for our societies, and how to get involved (if you decide you want to). Learn more at https://aantonop.com
From Andreas: You may already know that my mission is to educate as many people as possible about #Bitcoin and open blockchain technologies. Watching these videos and sharing them with others is a big part of that. Thank you for being part of this mission.
***Learn More From Andreas**
Amazon & Kindle: http://www.amazon.com/-/e/B00MVAG8Z8
Audible: https://www.audible.com/author/Andreas-M-Antonopoulos/B00MVAG8Z8
E-books & Merch: https://aantonop.io/shop
Patreon: https://patreon.com/aantonop
Website: https://aantonop.com
Workshops: https://aantonop.com/workshops
***Connect with Andreas on Socials***
Facebook: https://www.facebook.com/AndreasMAntonopoulos
Instagram: https://www.instagram.com/amantonop/
LinkedIn: https://www.linkedin.com/company/aantonop/
Twitter: https://twitter.com/aantonop
Thanks for watching, sharing, and subscribing!")
![Cryptocurrency Explained: Avoid GIANT Unexpected Tax Bills on Cryptocurrency Trades [2021]](https://i.ytimg.com/vi/P9vEZwT8T0o/mqdefault.jpg "Cryptocurrency Explained: Avoid GIANT Unexpected Tax Bills on Cryptocurrency Trades [2021]
Wait, I have to pay taxes on crypto-to-crypto trades AND selling bitcoin, ethereum tokens, or other cryptoassets for fiat?!? Maybe. In many places, you owe taxes on the money you make from investments - yes, taxes on crypto investments. In the last bull market, lots of people got rekt because they didn’t know the basics about taxes and crypto investments. But you can learn from their mistakes! While Andreas isnt a tax professional, in this video he explains some of the ways people have gotten hurt in the past and how you can avoid those pitfalls. Watch this if youre planning to sell or trade bitcoin, ether, or any other crypto investment.
This isnt tax advice, Andreas is not a tax professional. If youre concerned about these issues (and you probably should be) then find an attorney or accounting professional in your area who can teach you about local laws that apply to you and your specific trading activities.
Chapters
0:00 Down The Rabbit Hole: Capital gains taxes
1:52 39.6% marginal tax for long term capital gains for people making more than a million dollars a year
3:12 How capital gains taxes work in the US
5:40 How marginal rates work
9:37 There is danger from getting a whole bunch of taxable events from trading
12:10 Knowledge is power
This video is an excerpt from the April 2021 Bitcoin and Open Blockchain Livestream Session. Watch the entire session here: https://youtu.be/vGuCz56ihb4
Look at the chapters to skip to the question and answer YOU want to see most.
COMMENT below and let us know what you think of the video. Post your follow-up questions there too!
SUBSCRIBE to this YouTube channel and select the bell 🔔 for notifications: https://www.youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ?sub_confirmation=1
JOIN this YouTube channel to become a YouTube Community Member and access custom emoji and other perks: https://www.youtube.com/channel/UCJWCJCWOxBYSi5DhCieLOLQ/join
BECOME a Community Builder: https://patreon.com/aantonop
LEARN from Andreas in one of his popular Workshops which will teach you practical crypto skills. There’s even a FREE Intro to Bitcoin & Open Blockchains to get you started. https://aantonop.io/takeaworkshop
Taxes. Since cryptocurrency is global and borderless, it touches every tax system in the world. Many people who are just getting into trading dont understand taxes or the implications of how they might owe a lot of money. During 2017 and 2018, many people faced huge unexpected tax bills, the money they thought they made, they didnt really have. Watch this video to learn more about marginal tax rates, capital gains, and losses, and much more.
You can also learn from one of aantonops many books. Andreas has written three technical books for developers about blockchain technology, Mastering Bitcoin, Mastering Ethereum, and Mastering the Lightning Network (2021) published by O’Reilly Media. He’s also written The Internet of Money Series books, which explain why bitcoin, ethereum, and open blockchains matter.
About aantonop: Andreas isnt promoting a company or an organization; hes paid by the community (people who support this work on Patreon and YouTube) and provides an unbiased look at open blockchain technologies, what they can do for our societies, and how to get involved (if you decide you want to). Learn more at https://aantonop.com
From Andreas: You may already know that my mission is to educate as many people as possible about #Bitcoin and open blockchain technologies. Watching these videos and sharing them with others is a big part of that. Thank you for being part of this mission.
***Learn More From Andreas’ Workshops, Books & Events**
Amazon & Kindle: http://www.amazon.com/-/e/B00MVAG8Z8
Audible: https://www.audible.com/author/Andreas-M-Antonopoulos/B00MVAG8Z8
E-books & Merch: https://aantonop.io/shop
Patreon: https://patreon.com/aantonop
Website: https://aantonop.com
Workshops: https://aantonop.com/workshops
***Connect with Andreas on Socials***
Facebook: https://www.facebook.com/AndreasMAntonopoulos
Instagram: https://www.instagram.com/amantonop/
LinkedIn: https://www.linkedin.com/company/aantonop/
Twitter: https://twitter.com/aantonop
Thanks for watching, sharing, and subscribing!")
