Of course I'll use blockchain in my next application
summary
Explains Bitcoin’s mechanics with concrete numbers: blocks contain ~2–3k transactions, miners race to win a 12.5 BTC block reward, headers are kilobytes while full blocks are megabytes so SPV wallets download headers only, and miners’ energy arms race risks a 51% attack if one actor controls hashing. Compares proof-of-work to alternatives, shows a wallet/encryption demo and supply‑chain prototypes (Walmart/China) as real deployments, and flags engineering challenges for private chains: consensus choice, identity, throughput and operational cost.
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chapters (26)
- 0:00Introduction
- 1:28Why use blockchain
- 3:58How blockchain works
- 7:07Peer-to-peer networks
- 8:33Consensus mechanisms
- 10:19Hashing and security
- 12:30Mining process
- 15:06Proof of work explained
- 16:52Energy consumption concerns
- 17:3451% attack risks
- 18:16Longest chain rule
- 21:11Bitcoin transaction demo
- 24:10Private key encryption
- 28:29Public key cryptography
- 29:15Transaction steps
- 30:21Use cases overview
- 31:04Blockchain history
- 32:07Smart contracts
- 33:34EVM and smart contracts
- 34:36Enterprise blockchain
- 35:18Healthcare applications
- 36:02Diploma verification
- 36:42Supply chain tracking
- 37:24Social media alternatives
- 38:07When not to use blockchain
- 38:53Q&A and summary
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