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Challenge/response security architecture with fuzzy recognition of long passwords

  • US 6,026,491 A
  • Filed: 09/30/1997
  • Issued: 02/15/2000
  • Est. Priority Date: 09/30/1997
  • Status: Expired due to Term
First Claim
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1. A security method for controlling user access to a complex electronic system, comprising the actions of:

  • (a.) when a user requests access, prompting the user with a customized challenge string which is specific to that user, and waiting for the user to input a user password;

    (b.) checking said user password for similarity to a pre-defined response string which includes more than 20 alphanumeric characters; and

    (c.) allowing access to said system if said user password is substantially similar to said pre-defined password, even if said user password is not identical to said pre-defined password.

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