January 21, 2021

Consensus Algorithms, Blockchain Technology and Bitcoin UCL – by Andreas M. Antonopoulos

An academic lecture by Andreas M. Antonopoulos explaining the consensus algorithm, “Proof of Work”, used by bitcoin and many other blockchains. Andreas is a UCL alum.

This talk was presented in collaboration with the Department of Computer Science at University College London.

If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron:

What is Consensus: Rules without Rulers –
Bitcoin Security: Bubble Boy and the Sewer Rat –
Bitcoin, A New Species of Money: An Evolutionary Perspective on Currency –
Measuring Success: Price or Principle –
Why Open Blockchains Matter –
Decentralised Globalisation –
Investing in Education instead of Speculation –
Beyond Price: Bitcoin’s Impact on the Future –
How does the Blockstream satellite work? –
Regulation and the bank boycott –
Remittances and smuggling in Venezuela –
Bitcoin as everyday currency –
What is the appeal of sound money? –
Hyperbitcoinization –
Why permissioned blockchains fail –
Protocol development security –
How to avoid re-creating systems of control –
Wallets, nodes, and monetary sovereignty –
Is bitcoin testing governments? –
Will governments let privacy coins exist? –
Geopolitics and state-sponsored attacks –
Governance and social attack immunity –
Sanctions and censorship resistance –
State-sponsored digital currencies and trust minimization –
Taxation and failed societies –

Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin.

Follow on Twitter: @aantonop

He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters.

Subscribe to the channel to learn more about Bitcoin & open blockchains; click on the red bell to enable notifications about new videos!


Translations of MASTERING BITCOIN:



Translations of THE INTERNET OF MONEY:
Spanish, ‘Internet del Dinero’ (v1) –
French, ‘L’internet de l’argent’ (v1) –
Russian, ‘Интернет денег’ (v1) –
Vietnamese, ‘Internet Của Tiền Tệ’ (v1) –


Music: “Unbounded” by Orfan (
Outro Graphics: Phneep (
Outro Art: Rock Barcellos (

Nguồn: https://liberty2010.org/

Xem thêm bài viết khác: https://liberty2010.org/game/

in Game
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  • So eventually the power/energy companies will merge with “big tech” companies and compete against one another. If Bitcoin were to become a mainstream currency, where would that leave your average civilian who has no chance mining faster than the aforementioned mentioned conglomerates?

  • Andreas I have thousands of bitcoin cash in my wallet on my cellphone and I don't know how to cash out. Please help….

  • Awesome! Can anyone recommend another video about bitcoin which is also as technical and as long as this one?

  • 11:35
    indeed, a8d19153 (a8d191538209e335154750d2df575b9ddfb16fc7) is the SHA-1 of "Hello!n", the SHA-256 of "Hello!" is 334d016f (334d016f755cd6dc58c53a86e183882f8ec14f52fb05345887c8a5edd42c87b7).
    The guy from the public executed shasum without params, which, nowadays, uses sha1 by default, the way to obtain SHA-256 is through sha256sum or shasum -a 256. Apart from that, without cleaning the new-line.
    The way:
    $ echo -n "Hello!" | sha256sum
    $ echo -n "Hello!" | shasum -a 256

  • I may not have gone to college…but i have really invested in my education. This video is gold and is blessing to have available for free! Thank you

  • Watching this in 2019 wishing i saw it in 2016 . I invest everything i make into Bitcoin and other cryptocurrencys because i know what there truly worth ! Thanks for the awesome speach man !

  • Pretty neat! Andreas. I mined bitcoin in 2013 for money without knowing what I was doing. I left the industry only to return in 2017 – I've spent last 2yr watching videos like this! I know know better. I wish I watched this before I became a BTC miner…Very good!!

  • Hi Andreas, interestingly you mentioned the plan to increase the block size in 2016. I wonder what's your view of bitcoin cash and bitcoin cash SV?

  • Dr Andreas me perdoe e algo fiz centros supletivo s com problema de saúde deste criança são estudos………se formar desocupado e algo sério livros dor cabeça ética segurança saúde costas peso desobediência e perto portão rua como chá ? Pede pedra sopa receita.😍 Hoje como pessoas com perdas de espaço aceita café?

  • Andreas is a true genius! One can easily detect that, not from his deep knowledge on the subject, but from the humility with which she shares it with others! Standing applause!

  • Mac Terminal:

    hasum <<< 'Hello!'

    shasum <<< 'Hello!0'

    shasum -a 256 <<< 'Hello!'

    shasum -a 256 <<< 'Hello!0'

  • Watching this in 2019 gives me a real feeling of how tech evolves! This was recorded when BITCOIN CASH was still a theory without a name yet, we have two bitcoin cash now! lightning network was still alive only in theory, we have payment channels funded with 1 BTC currently and still growing! Truly bullish on the future of crypto!!💯

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