This series focuses on teaching you about cryptocurrencies from the very start! We'll start with databases, banks, distributed systems, and we will then go further with Bitcoin, Ethereum, Mina, and other cryptocurrencies that are making the world advance today. About: David Wong is an engineer at O(1) Labs working on the Mina cryptocurrency. Prior to that, he was the security lead for the Diem (also known as Libra) cryptocurrency at Novi, Facebook. And before that a security consultant at the Cryptography Services practice of NCC Group. David is also the author of Real-World Cryptography.