What Is A Public Key?

A public key is an alphanumeric string vital for receiving Bitcoin. When paired with a private key in a cryptographic duo, it governs access to the owned Bitcoin. Typically, a Bitcoin address represents the public key and is derived from its hash. Through public-key cryptography, the public key guarantees the secure receipt of Bitcoin transactions. In contrast, the associated private key confirms ownership and permits spending. For security, while one can freely share a public key, only the private key provides access to funds.