Secure point of sale presentation of a barcode at an information handling system display

摘要

Unauthorized copying of a transaction barcode is prevented by including a sensed condition or other publicly-accessible data with the transaction barcode for use as a comparison with the publicly accessible data determined at a barcode reader. If the sensed condition included in the transaction barcode indicates that the transaction barcode was generated for a different transaction, then the barcode reader invalidates the transaction. For instance, if the barcode was generated too distant in time, position, or sequential transactions, then the barcode reader invalidates the transaction barcode as an unauthorized copy of a transaction barcode generated for a different transaction.

主权项

1. A method for performing a point-of-sale transaction, the method comprising:
determining a publicly accessible data at a point-of-sale location; applying the publicly accessible data to encrypt an account identifier in a barcode; presenting the bar code at a display; reading barcode from the display with a barcode reader at the point-of-sale location; decrypting the barcode with the publicly accessible data at the point-of-sale location; and applying the account number from the barcode to perform the point-of-sale transaction; wherein determining a publicly accessible data at a point of sale location further comprises: determining a location with a GPS; and selecting a predetermined portion of the location as an encryption key to encrypt the account identifier.