What is a Multisig?

A multisig (multi-signature) wallet is a wallet that requires multiple private keys to approve a transaction, such as 2-of-3 or 3-of-5, removing any single point of failure in controlling funds.

Multisig Explained

Think of a bank vault that needs two managers to turn their keys at the same time. No single person can open it alone, and losing one key does not lock the vault forever.

A multisig wallet applies that rule onchain. Instead of one private key controlling the funds, a transaction needs approval from a threshold of keyholders, for example any 3 of 5 designated signers.

This is the standard for treasuries, DAOs, and team funds: one compromised or lost key cannot drain or freeze the wallet.

What a Multisig Means For

Examples

1. A DAO holds its treasury in a 4-of-7 multisig, requiring four council members to approve every transfer.

2. A startup pays contributors from a 2-of-3 multisig shared between two founders and an advisor.

3. An attacker phishes one signer's key but cannot move funds because the threshold requires two more approvals.

4. A team rotates a compromised signer out of its multisig without moving the underlying funds.

FAQs

How does a multisig wallet work?

The wallet is a smart contract or native scheme configured with a set of signers and a threshold. A transaction executes only after the threshold number of signers approve it.

What does 2-of-3 mean?

Three keys are authorized and any two of them must sign for a transaction to execute. Thresholds balance security against operational convenience.

What happens if a multisig signer loses their key?

As long as the remaining signers meet the threshold, funds stay accessible and the lost signer can usually be replaced through a signer-change transaction.

What are multisigs used for?

Treasuries, DAO funds, protocol admin controls, escrow, and any situation where shared or high-value funds should not depend on one person.

What are the downsides of multisig?

Slower operations, coordination overhead, and smart contract risk in contract-based implementations. Signer collusion at the threshold is also a governance consideration.