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Method and system for RFID transaction integrity utilizing an EEPROM

  • US 20090048936A1
  • Filed: 04/14/2008
  • Published: 02/19/2009
  • Est. Priority Date: 04/13/2007
  • Status: Abandoned Application
First Claim
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1. A method for purchasing goods or services utilizing an RFID apparatus, the RFID apparatus including an EEPROM, the EEPROM containing a first group of data blocks and a second group of data blocks, the purchase of goods being performed in connection with an RFID scanner comprising the steps of:

  • storing transaction data in respective data blocks of one of the first group of data blocks or the second group of data blocks of the EEPROM;

    placing an order for goods or services utilizing the RFID scanner;

    reading a start block pointer value from a data block of the EEPROM,the pointer value corresponding to the address of a last written of the first group of datablocks or the second group of data blocks;

    reading data from the last written group of data blocks;

    modifying the transaction data in accordance with the purchase order to create modified data;

    writing the modified data to one of the first group of data blocks or the second group of data blocks which is not the last written database;

    determining whether the writing to one of the first group or the second group of data blocks is successful, and changing the pointer value to indicate the group of data blocks containing the modified data.

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