Blockchain

• Cryptocurrency
• Byzantine fault tolerance
  • Proof of work
  • Proof of stake

Mechanism

A good mathematical explanation by 3b1b: https://www.youtube.com/watch?v=bBC-nXj3Ng4

A practical and direct demo of blockchain: https://www.youtube.com/watch?v=_160oMzblY8

Impacts

• Blockchain And The Future of the Internet:A Comprehensive Review

Criticisms

• The De-Facto List of Cryptocurrency/Blockchain Applications That Are Superior To Existing Tech
• I’ve recently come to believe that public (permissionless) ledgers/blockchains (aka Web3) are a dead end. - https://blog.dshr.org/2022/02/ee380-talk.html