Expanded smart card interface

摘要

Described herein is a smart card having a first set of contact pads disposed on a first region of a first surface of the smart card and a second set of contact pads disposed on a second region of the first surface. The first and second set of contact pads are configured to simultaneously electrically engage a socket of a host device and exchange data with the host device. The smart card also includes control circuitry communicatively coupled to the first and second sets of contact pads and operable to control the exchange of data with the host device.

主权项

1. A smart card comprising:
a card body, sized in conformity with the ISO 7816 standard and having a top edge and a left edge; a first set of eight contact pads disposed on a first region of a surface of the smart card, the first set of eight contact pads comprising a first contact pad, a second contact pad, a third contact pad, a fourth contact pad, a fifth contact pad, a sixth contact pad, a seventh contact pad, and an eighth contact pad; a second set of eight contact pads disposed on a second region of the surface, the second set of eight contact pads comprising a ninth contact pad, a tenth contact pad, an eleventh contact pad, a twelfth contact pad, a thirteenth contact pad, a fourteenth contact pad, a fifteenth contact pad, and a sixteenth contact pad, and the first and second set of contact pads configured to simultaneously electrically engage a socket of a host device and exchange data with the host device; and control circuitry communicatively coupled to the first and second sets of contact pads and operable to control the exchange of data with the host device in accordance with multiple modes to interface with input capabilities of the host device; wherein the control circuitry determines data exchange capabilities of the host device by identifying whether both sets of eight contact pads are electrically engaged with the socket of the host device or whether only one of the sets of eight contact pads is electrically engaged with the socket of the host device; wherein, when the control circuitry identifies that both sets of eight contact pads are electrically engaged with the socket of the host device, the control circuitry receives an encrypted audio/video stream from the host device, decrypts the encrypted audio/video stream to yield an output audio/video stream within the smart card, and initiates transmission of the output audio/video stream to the host device, using both sets of eight contact pads; and wherein, when the control circuitry identifies that only one of the sets of eight contact pads is electrically engaged with the socket of the host device, the control circuitry receives encrypted key information from the host device, decrypts the encrypted key information to obtain decrypted key information, and initiates transmission of the decrypted key information to the host device.