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Method of one time authentication response to a session-specific challenge indicating a random subset of password or PIN character positions

  • US 20060136317A1
  • Filed: 02/14/2006
  • Published: 06/22/2006
  • Est. Priority Date: 11/03/2000
  • Status: Active Grant
First Claim
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1. An interactive method for authentication of a client, comprising:

  • storing a client identifier (ACCOUNT NUMBER (406);

    ACC#{XYZ}—

    FIG. 8) for a client and an identification code (ID_PIN—

    FIG. 6) for the client in a memory (606), the identification code comprising a set of password or PIN characters with each consecutive character position number in the set associated with a particular character;

    supplying to the client via a data communication medium using a process (504) executed by a computer system, a prompt for entry of a client identifier;

    accepting in the computer system data from the client via a data communication medium, the data indicating the client identifier (406) for the client, and verifying that the data indicating the client identifier matches the stored client identifier (502);

    supplying to the client via a data communication medium using a process (508) executed by the computer system, a session-specific random subset of character position numbers from said identification code for the client, wherein the random subset of character position numbers does not include all of the character position numbers from the identification code;

    accepting input data (408, ID_PIN SUBSET—

    FIG. 8) in the computer system from the client via a data communication medium, the input data including a random subset of characters from the identification code, wherein the random subset of characters does not include all of the identification code; and

    determining (505) in the computer system, whether the input data match characters from the stored identification code in a session-specific random subset of character positions.

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