Exhibit 23.1




            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We  have  issued  our  report  dated  September  24,  2004,   accompanying   the
consolidated  financial  statements  included in the Annual Report of Integrated
Security  Systems,  Inc.  on Form  10-KSB for the year ended June 30,  2004.  We
hereby  consent  to  the  incorporation  by  reference  of  said  report  in the
Registration  Statements of Integrated Security Systems,  Inc. on Form S-3 (File
No. 33-89218) and on Form S-8 (File No. 33-59870-S and File No. 333-76558).



/s/ GRANT THORNTON LLP

Dallas, Texas
September 24, 2004