Lessons / Series
How Blockchain Works
- 1Keys and Signatures: How You Prove It's YoursCrypto has no password. Learn how a private key and a digital signature prove ownership, and what to check before you sign anything.Free
- 2What Is a Blockchain?A plain-English look at what a blockchain is, how blocks link together, why the past is hard to rewrite, and what it cannot do for you.Free
- 3Hashing: The Digital FingerprintLearn how a hash works as a digital fingerprint, why one changed letter changes everything, and how to use hashes to check a wallet download before you install it.Free
- 4Blocks and Chains: Why You Can't Change the PastLearn what's inside a block, how each block links to the one before it, and why confirmations matter when you send or receive crypto.Free
- 5Nodes: Who Keeps the CopiesNodes are the thousands of computers that keep and check the blockchain ledger. Learn what they do, who runs them, and what your wallet trusts every time you open it.Free
- 6Consensus: Proof of Work vs Proof of StakeLearn how proof of work and proof of stake help strangers agree on one version of the truth, and why neither one protects you from signing a bad transaction.Free
- 7What Is Crypto Mining?What crypto miners actually do, why proof of work uses so much electricity, and how to spot fake mining offers and cryptojacking.Free
- 8Forks: When a Chain SplitsWhat a blockchain fork is, how soft and hard forks differ, and why free fork coins are the bait thieves use. Part of the How Blockchain Works series.Free