Multisig Bitcoin Wallets: Eliminating Single Points of Failure

Multisignature (multisig) wallets require multiple private keys to authorize a transaction. This eliminates the risk of losing all funds if one key is compromised or lost.

How 2-of-3 Multisig Works

Three private keys are generated, stored in separate locations. Any two keys are needed to sign a transaction. If one key is stolen, the attacker can't move funds alone. If one key is lost, the remaining two can still access funds. This is the most popular multisig configuration.

Setup with Electrum

Create three separate Electrum wallets on different devices (or Tails USB sticks). Select 'Multi-signature wallet' during creation. Choose 2-of-3 cosigners. Export master public keys from each wallet and import them into the others. The resulting wallet requires any 2 of 3 devices to sign transactions.

Key Storage Strategy

Store each key in a different physical location. Example: Key 1 on your daily device, Key 2 on a hardware wallet in a safe, Key 3 seed phrase written on steel and stored offsite. This protects against theft, fire, and seizure simultaneously.