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Method and apparatus for conditioning access for a remotely-accessible device

  • US 7,170,390 B2
  • Filed: 02/18/2003
  • Issued: 01/30/2007
  • Est. Priority Date: 02/18/2003
  • Status: Active Grant
First Claim
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1. A method for updating a preprogrammed expiration time and date in a remotely-accessible device controlled by conditioning access comprising:

  • inputting a new expiration time and date and an external signature code into said remotely-accessible device;

    comparing said new expiration time and date with said preprogrammed expiration time and date;

    generating an internal signature code if said new expiration time and date is greater than said preprogrammed expiration time and date;

    comparing said internal signature code with said external signature code;

    saving said new expiration time and date and said internal signature code of said internal signature code is the same as said external signature code; and

    resetting said preprogrammed expiration time and date to said new expiration time and date.

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