A multi-signature (multi-sig) wallet requires more than one private key to authorize a transaction — for example, requiring 2 of 3 designated signers to approve before funds can move — removing the single point of failure that comes with a wallet controlled by just one key.
Key Takeaways
- Multi-sig wallets require a predetermined threshold of approvals before a transaction can execute, rather than any single key having unilateral control.
- This structure is particularly valuable for businesses, DAOs, or groups managing shared funds.
- Even for individuals, multi-sig can provide protection against a single point of failure.
- Setting up and managing a multi-sig wallet is more complex than a standard single-key wallet.
- Multi-sig requirements are enforced on-chain, different from an MPC wallet’s off-chain key-splitting approach.
Our Take
Multi-sig’s value proposition is straightforward and well-tested: no single compromised key, lost device, or dishonest individual can unilaterally move funds, since a predetermined threshold of separate approvals is always required.
The trade-off is operational complexity: every transaction requires coordinating multiple signers, and setting an appropriate threshold relative to signer availability is a genuine design decision worth thinking through carefully.
FAQs
Can one person control a multi-sig wallet?
It’s possible, but the more common and valuable use case is distributing keys among different individuals or devices specifically to remove single points of failure.
What happens if a multi-sig signer loses their key?
As long as the remaining signers still meet the required approval threshold, the wallet can continue functioning.
📎 Source: Coinbase Learn — What is Multi-Signature (Multi-Sig)?
