Patent ID: 11868991
Assignee: LIQUINEQ AG
Field: IT methods for management (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. A method for secure transactions in an environment with intermittent connectivity via a network to a blockchain, comprising the steps of:
generating, on a merchant device comprising a first processor, a first memory, a first display, and a first camera, a first two-dimensional barcode representing a transaction, the first two-dimensional barcode comprising a merchant identity, a transaction amount, and connectivity details for a private peer-to-peer ad hoc network with the merchant device;
displaying the first two-dimensional barcode on the first display;
receiving a network connection attempt with the merchant device from a buyer device via the private peer-to-peer ad hoc network;
where a connection is established between the buyer device and merchant device via the private peer-to-peer ad hoc network, receive a confirmation of the transaction from the buyer device via the private peer-to-peer ad hoc network, the confirmation comprising a buyer identity and an approval of the transaction;
where a connection is not established between the buyer device and merchant device via the private peer-to-peer ad hoc network, receive an image via the first camera of a second two-dimensional barcode displayed on the buyer device, the second barcode comprising the confirmation;
store a record of the transaction and confirmation, and when a network connection between the merchant device and a transaction blockchain becomes available, send the record of the transaction to a blockchain for recording;
receiving an image of the first two-dimensional barcode displayed on the merchant device via a second camera of a buyer device comprising a second processor, a second memory, a second display, and the second camera;
making the network connection attempt to the merchant device using the connectivity details for the private peer-to-peer ad hoc network;
where the connection is established between the buyer device and merchant device via the private peer-to-peer ad hoc network, receiving a user interaction with the buyer device initiating the confirmation, and transmit the confirmation to the merchant device;
where a connection is not established between the buyer device and merchant device via the wireless network connection, generating a second two-dimensional barcode representing the confirmation, the second two-dimensional barcode comprising the buyer identity and the approval of the transaction; and
displaying the second two-dimensional barcode on the second display.