A near field communication device included in a secure transaction card
provides an addition and/or transitional communication link for
communicating secure transaction information. The near field
communication device may be selectively engaged or disengaged and, when
engaged, either active or passive modes of operation of the near field
communication device can be selected. in the active mode, secure
transaction information is transmitted upon establishment of a
communication link with a complementary near field communication device.
In the passive mode, secure transaction information is transmitted upon
interrogation from a complementary near field communication device.
Secure transaction information is generated and stored for transmission
in a memory and at least a portion of the memory is erased or nulled upon
transmission or upon expiration of a selected period of time.