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Personal access management system

  • US 5,619,574 A
  • Filed: 02/13/1995
  • Issued: 04/08/1997
  • Est. Priority Date: 02/13/1995
  • Status: Expired due to Term
First Claim
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1. A method for coordinating the exchange of information between a user device and a provider device, comprising the steps of:

  • the user device;

    generating a message;

    retrieving a user device file name and a set of identification information stored in the user device;

    deriving a first key code;

    processing said identification information using said first key code to derive a set of processed identification information;

    sending said user device file name, said processed identification information, and said message to the provider device;

    the provider device;

    receiving said user device file name, said processed identification information, and said message;

    accessing a user file stored in the provider device using said user device file name as an index, said user file containing a set of recognition parameters corresponding to the user device;

    deriving a second key code using said recognition parameters;

    processing said processed identification information using said second key code to derive a set of de-processed identification information;

    comparing said de-processed identification information with a set of reference information stored in said user file; and

    terminating communication with the user device in response to a determination that said de-processed identification information is inconsistent with said reference information.

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