Term

X-only Public Key

A 32-byte public key format that includes only the X coordinate, used with Schnorr signatures and Taproot.

Type:

cryptography

bitcoin

definition

Taproot and BIP340 use x-only public keys (no parity byte) for cleaner key aggregation and smaller data. Parity is inferred during verification.

Example 1.1

"A P2TR output commits to an x-only internal key; spending reveals Schnorr signatures without the extra Y-parity bit."

A digital signature algorithm that optimizes transaction size, enhances privacy, and resolves malleability issues.

A Bitcoin upgrade that enables more private and efficient spending using Schnorr signatures and script path commitments.

A cryptographic identifier derived from a private key; used to verify signatures and derive addresses.

All terms and definitions may update as the Cryptionary improves.