Reading the Chain
Keys, addresses & signatures
Lesson 2 of 5
There is no login. A private key signs, a public key verifies, and your address is just a hash of the public key, which is why losing the key means losing the account.
What you'll learn
- Trace the chain private key → public key → address and say which parts are secret
- Explain what a digital signature proves and why the network never needs your password
- Sign and verify a message with real ECDSA, then watch a one-byte change fail verification
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Not sure yet? Try the free lesson first: What a blockchain actually is