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Removable media for password based authentication in a distributed system

  • US 6,061,799 A
  • Filed: 10/31/1997
  • Issued: 05/09/2000
  • Est. Priority Date: 10/31/1997
  • Status: Expired due to Term
First Claim
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1. An apparatus for use with a computer system, the computer system having one or more processes which are accessible by a client process that is authenticated by comparing information derived from a password which is changed from time to time to authentication data in the computer system, the apparatus comprising:

  • a. a portable computer readable medium for storing data thereon;

    b. a client identifier stored on the medium, the client identifier identifying the client process;

    c. a plurality of digital keys stored on the medium, one of the digital keys designated as current and associated with a current password that is in use, other of the digital keys associated with non-current previously-used passwords; and

    d. logic in the computer system responsive to the plurality of digital keys for allowing access by the client process to one of the processes requiring authentication if any one of the plurality of digital keys stored on the medium corresponds to the authentication data.

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