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Transaction system comprising a first transportable integrated circuit device, a terminal, and a security device

  • US 5,892,211 A
  • Filed: 05/01/1997
  • Issued: 04/06/1999
  • Est. Priority Date: 06/09/1994
  • Status: Expired due to Fees
First Claim
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1. A transaction system comprising:

  • a first transportable integrated circuit (IC) device including a processor, memory, data stored in the memory and an operating program stored in the memory, the data stored in the memory of the first IC device including stored value data representative of an amount of transferable cash-equivalent value;

    a terminal including a reader/writer device, a processor, memory and an operating program stored in the memory, the reader/writer device including means for establishing communication with the first IC device whereby the processor of the first IC device is in communication with the terminal processor, the terminal including means for transferring cash-equivalent value between the first IC devices and the terminal such that the stored value data of the first IC device is adjusted to reflect the transferred value and such that data representative of the transfer including the transferred value is written to the memory of the terminal; and

    a security device including a processor, memory, data stored in the memory and an operating program stored in the memory, the security device communicating with the terminal so that the processor of the security device communicates with the terminal processor whereby upon establishing communication with the first IC device, the terminal processor initiates and controls a series of operations by the security device processor utilizing the data and the operating program stored in the security device memory and data received from the first IC device for verification by the security device of the validity of the first IC device.

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