Payment devices using optical codes

Abstract

A smart card adapted for staging a transaction for performance in connection with a terminal of a transaction system is provided. The smart card includes a processor and a memory. The memory includes transaction staging code and user payment credentials. The smart card also includes a biometric input device, a display, and a clock. On successful biometric input through the biometric input device, the processor is adapted to run the transaction staging code to provide transaction staging information including the user payment credentials and a freshness factor derived from a time value from the clock. The transaction staging information is displayed on the display as an optical code for reading at the terminal of the transaction system. A method of using such a smart card to stage a transaction is also provided.

Dependencies are inferred from the claim text.