Glossary
Threshold Signature
A cryptographic scheme that lets any t-of-n parties cooperatively produce a valid signature for a single shared public key — no individual party can sign alone.
Where multisig produces multiple separate signatures verified by the receiving contract, a threshold signature produces a single signature that looks identical to a normal one. The signing key is split among n parties; any t of them can collaborate to sign for the shared public key.
Threshold schemes (Schnorr-based via FROST, ECDSA via GG18 / GG20) are the basis of MPC wallets (Fireblocks, Coinbase Custody, Web3Auth) and threshold-signed bridges. They produce smaller on-chain footprints than multisig and hide signer participation.