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:
sensing a condition specific at a point-of-sale location with a portable information handling system located at the point-of-sale location; applying a valued derived from the sensed condition encrypt an account identifier in a barcode; presenting the bar code at a display of the portable information handling system; reading the barcode from the display with a barcode reader at the point-of-sale location; decrypting the barcode with the value derived from the sensed condition at the point-of-sale location; and applying the account number from the barcode to perform the point-of-sale transaction.