What is a Public Key and Private Key?. A private key is a secret number that authorizes transactions. A public key and its derived address can be shared to receive funds. Possession of the private key equals control of the assets.
How it works
Asymmetric cryptography lets anyone verify that a transaction was signed by the holder of the private key without revealing the key itself.
Why it matters
Keys remove reliance on account providers and passwords. They enable direct ownership with verifiable signatures.
Common pitfalls
- Typing a private key into untrusted websites
- Confusing seed phrases with wallet passwords
- Failing to back up keys or seed phrases offline
Quick example
A merchant posts a public address for payments; only the merchant’s private key can move the received funds.
See also
- Seed Phrase
- Wallet
- Cryptographic Hash Function
TL;DR: What is a Public Key and Private Key? defined in plain English with practical next steps.
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