EXHIBIT 23.1 CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS We hereby consent to the inclusion in the Prospectus constituting a part of this registration statement of our report dated February 4, 2000 relating to the financial statements of Viisage Technology, Inc. (the "Company") appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 1999. We also consent to the references to us under the caption "Experts" in the Prospectus. /s/ BDO Seidman, LLP Boston, Massachusetts May 5, 2000