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

Claim 0:
1. A system for secure transactions in an environment with intermittent connectivity via a network to a blockchain, comprising:
a merchant device comprising a first processor, a first memory, a first display, a first camera, and a first plurality of programming instructions stored in the first memory which, when operating on the first processor, causes the merchant device to:
generate 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;
display the first two-dimensional barcode on the first display;
where a connection is established between a buyer device and the merchant device via a 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 the transaction blockchain for recording; and

wherein the buyer device comprises a second processor, a second memory, a second display, a second camera, and a second plurality of programming instructions stored in the second memory which, when operating on the second processor, causes the buyer device to:
receive an image of the first two-dimensional barcode displayed on the merchant device via the second camera;
where a connection is established between the buyer device and the merchant device via the private peer-to-peer ad hoc network, receive a user interaction at 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 the merchant device via the wireless network connection, generate a second two-dimensional barcode representing the confirmation, the second two-dimensional barcode comprising the buyer identity and the approval of the transaction; and
display the second two-dimensional barcode on the second display.