Every crypto wallet is built on a pair of linked codes: a public key and a private key. The public key is the one you can share. It works like a bank account number, in that people use it to send funds to you, but it gives no one the power to take anything out.
The private key is the secret half, and it is what authorises transactions. When you send crypto, your wallet uses the private key to create a digital signature proving you own the funds, without ever revealing the key itself. A public key can be derived from a private key, but never the reverse, so sharing it is safe.
In daily use you rarely handle the raw public key. Wallets show you a shorter crypto address derived from it. The rule stays simple: a public key or address is safe to share, but a private key must always stay private.
Frequently Asked Questions
Can someone steal my crypto if they have my public key?
No. A public key or address only lets people send funds to you or view your activity. Moving funds out requires the matching private key, which sharing the public key never reveals.
Is a public key the same as a wallet address?
They are closely related but not identical. A wallet address is a shorter code derived from your public key. In practice you share the address, and it serves the same purpose for receiving funds.
