Who generates the nonce? What makes it random? How is nonce-guessing important to the competitive process of mining? What happens if the hashing algorithm (SHA-256) was compromised? Is quantum computing a threat?
More on nonces and the mining process: https://github.com/bitcoinbook/bitcoinbook/blob/8ae3c056fb257111bda8883d9d204e8476f9870c/ch09.asciidoc
More about the SHA-1 collision: https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
More about SHA-1 and Bitcoin: https://bitcoin.stackexchange.com/questions/75135/is-sha-1-used-in-bitcoin
CORRECTION: At 5:53, I described what a collision was. However, the definition I outlined was actually for a pre-image attack, which is distinct from collision attacks. The subtitles have been edited to include the correction. https://en.wikipedia.org/wiki/Preimage_attack
These questions are from the MOOC 7.2 and 9.2, which took place on February 26th 2017 and February 23rd 2018 respectively. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles.
If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop
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Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin.
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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.
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Thank you so much. After hours of watching and reading, your explanation of the nonce made everything I have learned click.
is zero the hardest to find? does the machine tries zero after trying all other digits? could it as well be "111111111ojefenvie……" or "99999999kjsfnkjasdf…."?(for other algorythms for example) or not? does it even matter?
hahaha this video do you know what nonce means in england
Much respect, sir. Please unblock me on Twitter.
What about the threat of government quantum computing to destroy cc?
Outstanding
My only tie up so far is if someone can generate a private key on their computer with a vanity gen why can’t someone run it on a powerful computer to guess and test private keys? I know people say it’s takes long cause the probability of guessing is lower than guessing bill gates routing and account number, but that doesn’t matter. The computers doing the “work” and with more and more wallets being created its going to be easier to guess one- correct?
The answer is in show more.
Andreas mentions 15 Billion a few times….is this from a really old video? Market cap as I write this is > 140 Billion…
Andreas you are one of the very few who have stayed true to the decentralized bitcoin protocol. Please brother please many many people are thankful for your persistence against centralized blockchains and your services for equality through consensus based systems. Thank you my friend karma always rewards those in the end
You should go on the JIMMY DORE SHOW
As always, great Video! Where do we go to ask questions? YoutTube, Twitter, or do you have a question submission tool?
When do you make a talk about Elastos ?
How is the 15 billion dollars in bitcoin figure calculated?
The only people who find quantum computing to be exciting are those who have no idea what it really it means.
What happens when there's no fitting nonce to mine the block?
Awesome as always
Andreas the real mvp we follow you !
Andreas M. Antonopoulos what do you think about EOS?
me second ?
First to smashed the like…..:-)