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Enhanced call-back authentication method and apparatus for remotely accessing a host computer from a plurality of remote sites

  • US 5,280,581 A
  • Filed: 02/27/1992
  • Issued: 01/18/1994
  • Est. Priority Date: 02/27/1992
  • Status: Expired due to Term
First Claim
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1. A method that provides for remote accessing of a host computer system from a plurality of remote locations by a user having a single registered remote phone number for call-back said method comprising the steps of:

  • using a remotely located computer having an attached modem to connect to the host computer system by way of a modem connected thereto;

    logging on the host computer system by passing an authentication check by entering a user ID and password when requested by the host computer system;

    after passing the authentication check by entering the correct user ID and password, requesting a modification to the user'"'"'s registered remote phone number for call-back;

    receiving questions sent by the host computer system using a distributed user authentication protocol which requires, the remote user to answer these questions by providing correct answers, incorrect answers, or no answers in a predetermined manner;

    providing the appropriate answers to said questions;

    after providing the appropriate answers to the questions posed by the distributed user authentication protocol, receiving a request from the host computer system for the input of a new registered remote phone number that is stored in a file on the host computer system associated with the user ID of the remote user;

    providing that the host computer system breaks the telephone connection and dials the new registered remote phone number of the remote user; and

    again logging on the host computer system by passing the authentication check.

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