System and method for secure multi-party computation based blockchain transaction

A system for creation of a multi-party computation (MPC) cryptographic signature for a blockchain based computer network for a message for signing received by at least one first computing device to sign the received message with a generated at least one first share of a cryptographic key, based on a distributed key generation MPC protocol, the system comprising:

• at least one second computing device, configured to:
• generate at least one second share of the cryptographic key, based on the distributed key generation MPC protocol;
• receive, from the at least one first computing device, the message signed with the at least one first share;
• and
• sign with the at least one second share the received message signed with the at least one first share, and
• a full node of the computer network, in communication with the at least one second computing device, the full node configured to:
• receive, from the at least one second computing device, the message signed with the at least one second share;
• and
• add a transaction to a ledger of the computer network, in accordance with the received message signed by the at least one first share and the at least one second share,
• wherein the message signed by the at least one first share and the at least one second share corresponds to a private cryptographic key of the computer network,
• and wherein the at least one first computing device is further configured to validate that the message signed by the at least one first share and the at least one second share corresponds to a public cryptographic key of the computer network.