Multisig
Multisig (multisignature) requires multiple private keys to sign a transaction, typically used for enterprise custody, family vaults, or extra security.
Multisig wallets require m-of-n signatures to spend (e.g. 2-of-3 or 3-of-5). Advantage: theft of one key isn't enough; loss of one key is recoverable. Use cases: business treasury, family inheritance, exchange cold storage, escrow. Tools: Sparrow Wallet, Specter, Casa, Unchained.
Example
A company protects €5M in BTC with 2-of-3 multisig: one key each with CEO, CFO and accountant. Every transaction requires co-signing — no single point of failure, no single point of trust.
Frequently asked questions
Is multisig more expensive?
On-chain, yes — multisig transactions are bigger. Typically 50-200% more fees than single-sig. Taproot-multisig is cheaper via key aggregation.
Related terms
Further reading
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