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Identifying changed records in a file stored on an electronic token

  • US 20030097382A1
  • Filed: 11/16/2001
  • Published: 05/22/2003
  • Est. Priority Date: 11/16/2001
  • Status: Active Grant
First Claim
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1. A method for identifying changed records in a file on an electronic token, the method comprising steps of:

  • calculating at least one change detection code (CDC) for records of the file;

    comparing the calculated CDC with a respective associated, stored CDC in order to determine if at least one associated record has changed since the stored CDC was calculated; and

    if the calculated CDC is not equal to the stored CDC, executing a predefined algorithm to effect registration of a change, and saving the calculated CDC as the stored CDC.

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