Method and system for blockchain transaction confirmation for small merchants

A method for facilitating payment transactions for offline merchants through a third-party service provider, comprising:

• generating, by a processor of an encryption device of an offline merchant, a data message including a merchant identifier and a transaction amount;
• transmitting, by a transmitter of the encryption device, the data message to a computing device over a direct communication channel;
• receiving, by a receiver of a processing server from a payment network, which is different from the direct communication channel, a first confirmation message for a payment transaction from a the computing device, where the first confirmation message includes at least the merchant identifier, a consumer identifier, and the transaction amount transmitted to the computing device by the encryption device, the first confirmation message being encrypted according to a first encryption key pair shared between the processing server and the computing device, and wherein the encryption device is offline relative to the payment network;
• decrypting, by a processor of the processing server, the encrypted merchant identifier and consumer identifier using a private key of the first cryptographic key pair;
• generating, by the processor of the processing server, a notification message, where the notification message includes at least the merchant identifier, the consumer identifier, and the transaction amount;
• encrypting, by the processor of the processing server, the notification message using a public key of a second cryptographic key pair shared between the processing server and the encryption device;
• transmitting, by a transmitter of the processing server, the encrypted notification message to the computing device over the payment network;
• receiving, by a receiver of the encryption device, the encrypted notification message from the computing device over the direct communication channel;
• decrypting, by a the processor of the encryption device, the encrypted notification message using a private key of the second cryptographic key pair;
• and
• displaying, by a display interfaced with the encryption device, a second confirmation message including at least the consumer identifier included in the decrypted notification message.