

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent  public  accountants,  we hereby consent to the  incorporation by
reference in this Form S-4  Registration  Statement of our reports dated October
30, 1997, included in Transaction  Systems  Architects,  Inc.'s Annual Report on
Form 10-K for the fiscal year ended September 30, 1997, and to all references to
our firm included in this Registration Statement.

                                                           ARTHUR ANDERSEN LLP

Omaha, Nebraska,
 June 5, 1998

