Exhibit 23.1

                   [Letterhead of Stonefield Josephson, Inc.]

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

         To the Board of Directors
         Mitek Systems, Inc.

         We consent to the use of our Independent Registered Public Accounting
         Firm's Report, dated January 12, 2005 covering the financial statements
         of Mitek Systems, Inc. for the year ended September 30, 2004 to be
         included in this Amendment No. 3 to the registration statement
         33-119505 on Form S-2 to be filed with the Commission on or about May
         13, 2005.

         We also consent to the reference to us as experts in matters of
         accounting and auditing in this registration statement.

         /s/ Stonefield Josephson, Inc.
         STONEFIELD JOSEPHSON, INC.
         CERTIFIED PUBLIC ACCOUNTANTS

         Santa Monica, California
         May 13, 2005