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Multisignature (MultiSig) refers to requiring more than one key to authorize a Bitcoin transaction. It is generally used to divide up responsibility for possession of bitcoins.

A multisignature address is an address that is associated with more than one private key. The simplest type is an m-of-n address - it is associated with n private keys, and sending bitcoins from this address requires signatures from at least m keys. A multisignature transaction is one that sends funds from a multisignature address.

Multisignature with Trezor[edit]

It is possible to use Multisignature transactions with Trezor device and Electrum.

Multisignature DEMO using Trezor and Electrum starts at 2:42:57

See also this blog to learn more about using Multisignature transactions with Trezor.

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