it's called 2 of 3 multisig and it's a standardized part of most cryotocurrency....

		solotronics on Dec 28, 2017 \| parent \| context \| favorite \| on: Exmo Bitcoin exchange chief executive kidnapped in... it's called 2 of 3 multisig and it's a standardized part of most cryotocurrency. it requires X of Y separate key signings to complete a transaction from an address