How is SHA-256 used to verify data integrity in Bitcoin? What does it mean to sign a message? Is there a difference in the validation process of compressed versus uncompressed keys? More: https://github.com/bitcoinbook/bitcoinbook/blob/efb111026fe79d9ba2f17689463dbbca6d4a6469/appdx-bitcoinwhitepaper.asciidoc These questions are from the August monthly subscriber session and the third session of MOOC 11, which took place on September 1st 2018 and February 14th 2019. 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 RELATED: What is a private key? - https://youtu.be/xxfUpIV9wRI Public keys vs. addresses - https://youtu.be/8es3qQWkEiU Re-using addresses - https://youtu.be/4A3urPFkx8g Cryptographic primitives - https://youtu.be/RIckQ6RBt5E Derivation paths and watch-only wallets - https://youtu.be/tPCN3nDVzZI Key storage best practices - https://youtu.be/A5I55aOgX2o Key management and inheritance - https://youtu.be/W3XADagE6P8 Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in Bitcoin. He is the author of “Mastering Bitcoin,” “The Internet of Money" series, and "Mastering Ethereum." Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ Subscribe to the channel to learn more about Bitcoin & open blockchains; click on the red bell to enable notifications about new videos! MASTERING BITCOIN, 2nd Edition: https://amzn.to/2xcdsY9 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ THE INTERNET OF MONEY, v1: https://amzn.to/2ykmXFs THE INTERNET OF MONEY, v2: https://amzn.to/2IIG5BJ Translations of THE INTERNET OF MONEY: Spanish, 'Internet del Dinero' (v1) - https://amzn.to/2yoaTTq German, 'Das Internet des Geldes' (v1) - https://amzn.to/2LEiyqO German, 'Das Internet des Geldes' (v2) - https://amzn.to/2VCzse5 French, 'L'internet de l'argent' (v1) - https://www.amazon.fr/Linternet-largent-Andreas-M-Antonopoulos/dp/2856083390 Russian, 'Интернет денег' (v1) - https://www.olbuss.ru/catalog/ekonomika-i-biznes/korporativnye-finansy-bankovskoe-delo/internet-deneg Vietnamese, 'Internet Của Tiền Tệ' (v1) - https://alphabooks.vn/khi-tien-len-mang MASTERING ETHEREUM: https://amzn.to/2xdxmlK Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)