Crypto Glossary
Public Key
An address-like value that other people use to send you crypto. Safe to share.
Definition
A public key is the partner of your private key. It is mathematically derived from the private key, but you cannot work backwards from the public key to the private one.
Most wallets show you a shorter version of the public key called an address. You can paste that address anywhere, and people can use it to send you crypto without ever putting your funds at risk.
Related terms
- Private KeyA secret string of characters that proves you own a crypto address. Anyone who sees it can spend your funds.
- WalletAn app or device that holds the keys you need to spend and receive crypto.
- Seed PhraseA list of 12 or 24 ordinary words that backs up an entire wallet.
Source: What The Block! Dictionary v1.0 (last updated 2026-04-25).