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Multi-signature (multisig) refers to requiring multiple keys to authorize a transaction on a blockchain rather than a single signature from one key. It has a number of applications.

  • Dividing up responsibility for possession of tokens among multiple people.
  • Avoiding a single-point of failure, making it substantially more difficult for the wallet to be compromised.
  • m-of-n backup where loss of a single seed doesn't lead to loss of the wallet.[1]