Method and system for the atomic exchange of blockchain assets using transient key pairs

A method for atomic exchange of assets on multiple blockchains using transient key pairs, comprising:

• generating, by a first computing device, a proposal message, the proposal message including at least a first transaction value, a first network identifier corresponding to a first blockchain, a second transaction value, a second network identifier corresponding to a second blockchain, and a swap public key of a swap cryptographic key pair;
• generating, by the first computing device, a first digital signature for the proposal message;
• encrypting, by the first computing device, the first digital signature using the swap public key and a first private key of a first cryptographic key pair;
• appending, by the first computing device, the encrypted first digital signature to the proposal message;
• and
• transmitting, by the first computing device, the proposal message with appended encrypted first digital signature to a second computing device, wherein the first transaction value includes a hash value generated using transaction data for a first blockchain transaction using the first blockchain and the second transaction value include transaction data for a second blockchain transaction using the second blockchain.