Abstract: The present disclosure relates to a financial transaction system using individual distribution keys based on multi-party computation. The financial transaction system includes at least: a private key pieces generation unit dividing an individual private key corresponding to a user and generating private key pieces; an individual distribution key generation unit generating the individual distribution key corresponding to the user by using some of individual private key pieces shared with one or more other users and some of the plurality generated individual private key pieces; and a signature unit signing with the individual distribution key of the user, in which when a verification is performed by combining a signature value signed by the individual distribution key of the user and a signature value signed by individual distribution keys of one or more other users, the transaction is concluded between the users who sign.