Definition
A multi-signature wallet, or multisig wallet, applies a threshold rule to spending or other authorized actions. In a two-of-three arrangement, any two of three approved signing keys must cooperate. The keys may belong to different people or be held separately by one owner. This reduces reliance on a single key, although it does not automatically make the arrangement decentralized or free of custody risk.
How It Works
Implementations vary by blockchain: some use native scripting conditions, while others use smart contracts. A transaction is proposed, the required parties inspect and approve it, and execution occurs only when the applicable conditions are satisfied. Multisig is different from sharing one recovery phrase among several people, which gives each person full independent control. It is also distinct from threshold signing schemes that jointly produce one signature.
Key Considerations
A treasury might require two authorized team members to approve a payment, reducing the effect of one compromised key. Effective separation matters: storing every signer on the same infected device defeats much of the benefit. Losing enough keys to fall below the threshold can freeze access. Document signer replacement and recovery procedures, verify the exact transaction each signer sees, and evaluate contract modules or administrative exceptions that could change the apparent rule. Additional approvals improve control but introduce coordination costs and do not guarantee that an approved transaction is wise.