Multi-signature: securing crypto assets with multiple parties
Multisig (often 2-of-3) requires multiple signatures to move funds. Ideal for families, businesses, and large estates: no single point of failure, but a more demanding setup.
With a standard wallet, a single signature is enough to move funds. If someone gets hold of your seed, it's over. Multi-signature (or "multisig") changes the game: it requires multiple signatures to validate a transaction.
The principle explained
The most common format is 2-of-3: three different keys are created, and two are enough to sign a transaction. Specifically:
- If you lose one key, the other two are enough to recover your funds.
- If one key is stolen, the attacker can't do anything without a second one.
- No single point of failure.
It's the sweet spot between security (the theft of one key is not enough) and resilience (the loss of one key does not block your funds). You can do 3-of-5, 4-of-7, etc., but 2/3 covers 90% of real-world cases.
Three cases where multisig makes perfect sense
Couple or family
Two spouses each hold a key, a third is stored with a notary or in a safe. Neither can move funds alone, and the patrimony remains accessible if one disappears. This is the ultimate "family treasure" setup.
Business
Crypto treasury is protected even if a co-founder loses their equipment or leaves the company. No single signature can compromise funds. And transaction governance becomes sound — each movement is validated by multiple people.
Significant personal wealth
You keep two keys yourself (different locations) and one with a trusted relative or in a bank safe. No burglary can empty your funds, even if you are coerced.
"For crypto wealth exceeding €100,000, multisig is no longer optional — it's the professional standard."
Known limitations
Multisig requires a little more rigor than a classic setup:
- More complex initial setup (software like Specter, Sparrow, or Casa for individuals).
- Each transaction requires coordination from multiple signers.
- Not all wallets natively support multisig.
Multisig is not a first setup. First, master a single-signature wallet perfectly, make a few transactions, understand your seed and backups thoroughly. Multisig comes after, when the fundamentals are solid.
How to get started?
If you're ready to switch to multisig, the most accessible way today:
- Choose 2 or 3 compatible hardware wallets (Coldcard, Trezor, Keystone, Ledger).
- Install a multisig coordinator like Sparrow Wallet or Specter Desktop.
- Configure the quorum (2-of-3 by default).
- Back up each seed separately, in distinct locations.
- Test with a small amount before transferring the bulk.
Prepare your multisig setup
Discover multisig-compatible hardware wallets — Trezor, Keystone, and more.
Open the comparator