Multisignature (multisig) refers to requiring more than one key to authorize a Bitcoin transaction. It is generally. Multisig is a wallet that operates with more than one key. This post explain what Multisig is and covers the best Bitcoin multisig wallets. This tutorial shows how to create a 2 of 2 multisig wallet. A 2 of 2 multisig consists of 2 separate wallets (usually on separate machines and potentially controlled.