Exhibit 32.1
CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report of Authentidate Holding Corp. (the “company”) on Form 10-Q for the period ending March 31, 2009 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, being, O’Connell Benjamin, President of the company, and William A. Marshall, Chief Financial Officer of the company, respectively, do each hereby certify, pursuant to 18 U.S.C. ss.1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the company.
| Dated:May 14, 2009 | ||||
/s/ O’Connell Benjamin | /s/ William A. Marshall | |||
| President | Chief Financial Officer | |||