Multisig (Gnosis Safe)

A multisig (multi-signature wallet) is a wallet that needs approval from several keys before a transaction executes, rather than a single private key. It is set up as an "M-of-N" scheme: of N authorized signers, any M must sign for a transaction to go through - for example 2-of-3 or 3-of-5. This removes the single point of failure that a normal wallet carries, where one compromised or lost key means total loss.

On Ethereum a multisig is itself a smart contract that holds the funds and enforces the approval threshold. Safe (formerly Gnosis Safe) is the most widely used implementation, securing a large share of on-chain treasury assets. Each signer uses their own wallet - ideally a hardware wallet - and the Safe only moves funds once enough of them have signed the same transaction.

The security benefit is twofold. An attacker who steals one key still cannot move anything, and the organization is protected against the loss of any single key, since the remaining signers can still reach the threshold. Thresholds can be tuned to the stakes: a higher M for cold treasury funds, a lower one for routine operations.

For real-world assets, a multisig is standard practice for any wallet that controls serious value or privileged powers - the issuer's treasury, the address that can mint tokens, or the admin role that manages a whitelist. An SPV admin treasury holding deal funds should not sit behind one person's key.

A multisig is strong operational security, not a substitute for good signer practices. The scheme is only as sound as the independence of its signers - keys held by one person, or all on one device, defeats the purpose.

Source: Safe docs (docs.safe.global), as of 2026.