SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 8-K/A
                                 AMENDMENT NO. 3

                                 CURRENT REPORT
                       PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): February 4, 2005

                     VASCO DATA SECURITY INTERNATIONAL, INC.

               (Exact name of registrant as specified in charter)

         Delaware                        000-24389               36-4169320
(State or other jurisdiction           (Commission             (IRS Employer
    of incorporation)                  File Number)         Identification No.)

                        1901 South Meyers Road, Suite 210
                        Oakbrook Terrace, Illinois 60181
                    (Address of principal executive offices)

                                 (630) 932-8844
              (Registrant's telephone number, including area code)

                                       N/A
          (Former name or former address, if changed since last report)

         Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

         [ ] Written communications pursuant to Rule 425 under the Securities
Act (17 CFR 230.425)

         [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
(17 CFR 240.14a-12)

         [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under
the Exchange Act (17 CFR 240.14d-2(b))

         [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under
the Exchange Act (17 CFR 240.13e-4(c))

Explanatory Note:
This Form 8-K/A is filed as an amendment to the Current Report on Form 8-K filed
by VASCO Data Security International, Inc. on February 8, 2005 as amended on
April 20, 2005 and May 23, 2005. This amendment is being filed for the sole
purpose of providing a revised independent accountants' report, which states
that the audit was conducted in accordance with auditing standards generally
accepted in the United States.




SECTION 9 - FINANCIAL STATEMENTS AND EXHIBITS

ITEM 9.01 - FINANCIAL STATEMENTS AND EXHIBITS

         (a)      Audited financial statements of A.O.S.-Hagenuk B.V. at
                  December 31, 2004, 2003 and 2002, and for each of the three
                  years in the period ended December 31, 2004, are attached as
                  Exhibit 99.3 hereto.

         (b)      Unaudited consolidated pro forma balance sheet as of December
                  31, 2004 and the unaudited consolidated pro forma statement of
                  operations for the year then ended, including notes thereto,
                  are attached as Exhibit 99.4 hereto.

         (c)      Exhibits



                  Exhibit
                  Number        Description
                  -------       -----------------------------------------------------------------------------------------------
                             
                   99.1         Press Release announcing the acquisition of A.O.S.-Hagenuk dated February 8, 2005 *

                   99.2         Registration Rights Agreement by and among A.O.S. Holding B.V., Filipan Beheer B.V., Mr. Mladen
                                Filipan, and Pijnenburg Beheer N.V., and VASCO Data Security International, Inc., dated
                                February 4, 2005. *

                   99.3         Financial Statements

                   99.4         Unaudited Pro Forma Financial Information *

                    *           Filed Previously.


                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.



Date: March 2, 2006            VASCO Data Security International, Inc.
                               ------------------------------------------------
                               (Registrant)



                               By: /s/ Clifford K. Bown
                               ------------------------------------------------
                               Clifford K. Bown
                               Chief Financial Officer




                                  EXHIBIT INDEX



Exhibit
Number       Description
-------      --------------------------------------------------------------------------------------------------------
          
99.1         Press Release announcing the acquisition of A.O.S. - Hagenuk dated February 8, 2005 *

99.2         Registration Rights Agreement by and among A.O.S. Holding B.V., Filipan Beheer B.V., Mr. Mladen Filipan,
             and Pijnenburg Beheer N.V., and VASCO Data Security International, Inc. dated February 4, 2005. *

99.3         Financial Statements

99.4         Unaudited Pro Forma Financial Statements *

*            Filed Previously