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

Published on June 18, 2021

Interesting guide top searched Weight Loss, Email Newsletter, and Are Algorithms For Blockchains Public, 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.

0:00 Introduction
1:38 What is bitcoin?
3:07 SHA-256
21:28 Consensus rules
23:47 25 bitcoin reward
26:38 Who sets the validation rules?
28:46 Bitcoin blockchain technology explained
46:23 Other protocols for consensus
47:14 The longest chain and blocks
51:07 Bitcoin mining
53:27 How often does a fork happen?
1:06:41 Every node has to fully validate from the genesis block to today
1:08:31 Nakamoto consensus
1:09:14 Scaling other consensus algorithms
1:10:44 Consensus algorithm as a scientific discipline
1:11:51 Process consensus
1:13:02 Reference consensus
1:13:25 5 consensus constituencies
1:15:33 It’s not so easy to shift consensus in bitcoin
1:17:33 How many transactions can you get done in 10 minutes?
1:21:43 Bitcoin and Moore’s law

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 (
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Are Algorithms For Blockchains Public

Are Algorithms For Blockchains Public, Consensus Algorithms, Blockchain Technology and Bitcoin UCL – by Andreas M. Antonopoulos.

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