<aside> 💡 Youtube视频：https://www.youtube.com/playlist?list=PLUl4u3cNGP63UUkfL0onkxF6MYgVa04Fn

</aside>

1 Introduction for Blockchain and Money

• Internet and exchange: PizzaNet created the first pizza ordered online, but it has to be paid offline.
• Cryptography: Communications in the presence of adversaries. Encrypt & Decrypt.
  1. Ancient time: symbols and promises
  2. WWII: Enigma machine
  3. The year of 1976: the idea of Asymmetric cryptography was generated. And it's now the heart of blockchain & internet

With these tech & theoretical basis, on Halloween 31st, October, 2018, at 18:10:00 UTC. An email was sent to Newsgroups: gmane.comp.encryption.general.

From: Satoshi Nakamoto [email protected]

Subject: Bitcoin P2P e-cash paper

I've been working on a new electronic cash system that's fully peer-to-peer, with no trusted thrid party.

Therefore, the blockchain was born.

Blockchain: A timestaped append-only log → Auditable database & Consensus protocol

Somebody in 2010 uses bitcoin to exchange for the Pizza. Bitcoin is designed to be a money system, and now it jumps to the area of finance.

What is the role of Money?

• Medium of exchange
• Store of value
• Unit of Account