Schnorr Signature

A digital signature scheme based on the discrete logarithm problem, known for its linear aggregation property: multiple signatures over the same message can be combined into a single signature that verifies against an aggregated public key (computed via a secure key-aggregation scheme like MuSig2 to prevent rogue-key attacks). Bitcoin added native Schnorr support via Taproot (BIP-340), enabling key aggregation and threshold schemes like MuSig2. Schnorr signatures are 64 bytes, shorter than ECDSA's variable-length DER encoding.