Authentidate to Present At Roth Capital Partners 17th Annual Growth Stock Conference

SCHENECTADY, N.Y.

Feb 16, 2005

Authentidate Holding Corp. (Nasdaq:ADAT) announced today that Suren Pai, Authentidate's CEO, will make a presentation on the Company at the Roth Capital Partners 17th Annual Growth Stock Conference.

The presentation will be at 2 p.m. ET on Tuesday, February 22, 2005. The presentation will be web cast and can be viewed on the Company's web site at www.Authentidatehc.com. To access the web cast once on the site, click on the "Investor" link, then on the "Audio archive" link.

The presentation will be archived on the Company's web site for 90 days.

About Authentidate Holding Corp.

Authentidate Holding Corp. (AHC) is the holding company of five business units; DocStar, Authentidate International AG, Authentidate, Inc., DJS Marketing Group/Computer Professionals International and Trac Medical Solutions, Inc. DocStar sells proprietary document imaging software that includes the Authentidate technology. Authentidate and Authentidate AG provide the authentication of digital data through its proprietary and patent pending technology. Authentidate intends to establish itself as the authority on "content security" as it is a growing sector of the electronic network security infrastructure market. DJS delivers professional services centered around technology systems integration projects, staff augmentation, out-tasking, outsourcing services and resells computer related products. Trac Medical offers an electronic form processing solution and utilizes the Authentidate technology to prove the authenticity of the content represented in completed healthcare forms.

About the Roth Capital Partners 17th Annual Growth Stock Conference

This conference will feature more than 220 leading growth companies in sectors such as Technology, Healthcare, Financial Services and Consumer Products. A concentrated, two-day program will allow institutional investors to meet the executives from a select group of companies that have been hand picked by the Roth Capital Partners research team. 40% of this year's participating companies are presenting here for the first time. The average market cap of this year's presenters is around $330 million, with the median around $185 million. This closely mirrors the average and median market cap for the proposed Russell Microcap(TM) Index which is expected to be around $277 million and $176 million respectively.

To register for this conference, please contact your Roth sales representative at 800-678-9147. Please note that this conference is by invitation only.

This press release contains forward-looking statements within the meaning of section 27A of the Securities Act of 1933 and section 21E of the Securities Act of 1934. When used in this release, the words "believe," "anticipate," "think," "intend," "plan," "will be," "expect," and similar expressions identify such forward-looking statements. Such statements regarding future events and/or the future financial performance of The Company are subject to certain risks and uncertainties, which could cause actual events or the actual future results of the Company to differ materially from any forward-looking statement. Such risks and uncertainties include, among other things, the availability of any needed financing, the Company's ability to implement its business plan for various applications of its technologies, the impact of competition, the management of growth, and the other risks and uncertainties that may be detailed from time to time in the Company's reports filed with the Securities and Exchange Commission. In light of the significant risks and uncertainties inherent in the forward-looking statements included herein, the inclusion of such statements should not be regarded as a representation by the Company or any other person that the objectives and plans of the Company will be achieved.

SOURCE: Authentidate Holding Corp.