NON-EXECUTIVE DIRECTOR STOCK OPTION PLAN OF AUTHENTIDATE HOLDING CORP. As amended, effective May 19, 2010

Exhibit 10.2

NON-EXECUTIVE DIRECTOR

STOCK OPTION PLAN OF

AUTHENTIDATE HOLDING CORP.

As amended, effective May 19, 2010

1. PURPOSE

The purpose of the Non-Executive Director Stock Option Plan is to provide a means by which (i) each Director of Authentidate Holding Corp. (the “Company”) who is not otherwise a full-time employee of the Company or any subsidiary of the Company (each such person being hereafter referred to as a “Non-Executive Director”) and (ii) each person appointed as a member of any Advisory Board established or maintained by the Company who is not otherwise an employee of the Company or any subsidiary of the Company or an Outside Director (each such person being hereinafter referred to as an “Advisor”) will be given an opportunity to purchase Common Stock, $.001 par value per share, of the Company (“Common Stock”). The Company, by means of the Director Plan, seeks to attract and retain the services of qualified independent persons to serve as Non-Executive Directors of the Company and as Advisors on the Company’s various Advisory Boards, and to provide incentives for such persons to exert maximum efforts for the success of the Company.

2. ADMINISTRATION

(a) The Director Plan shall be administered by the Board of Directors of the Company (the “Board”) or a committee of the Board (the “Committee”) which shall at all times consist of not less than two (2) officers of the Company who are not entitled to participate in the Director Plan, to be appointed by the Board of Directors and to serve at the pleasure of the Board of Directors.

(b) Grant of options under the Director Plan and the amount and nature of the awards to be granted shall be automatic as described in Section 5 hereof. However, all questions of interpretation of the Director Plan or of any options issued under it shall be determined by the Board or Committee and such determination shall be final and binding upon all persons having an interest in the Director Plan. A majority of the Board’s or Committee’s members shall constitute a quorum, and all determinations shall be made by a majority of such quorum. Any determination reduced to writing and signed by all of the members of the Board or Committee shall be fully effective as if it had been made by a majority vote at a meeting duly called and held.

3. SHARES SUBJECT TO THE PLAN

There shall be no aggregate limitation on the number of shares of Common Stock that may be acquired pursuant to options granted under the Director Plan.

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The Common Stock subject to the Director Plan may be in whole or in part authorized and unissued shares of Common Stock or issued shares of Common Stock which shall have been reacquired by the Company. If any Option shall expire or terminate for any reason without having been exercised in full, the unissued shares subject thereto shall again be available for purposes of the Director Plan.

4. ELIGIBILITY

Options shall be granted only to (a) Non-Executive Directors serving on the Board of Directors of the Company and (b) Advisors serving on the Advisory Boards of the Company. Non-Executive Directors shall not be entitled to receive Options for serving as Advisors on Advisory Boards of the Company.

5. NON-DISCRETIONARY GRANTS

(a) Grants to Outside Directors

(i) Commencing on the date that this Non-Executive Director Stock Option Plan, as amended, is approved by the Board of Directors of the Company, each new Non-Executive Director to the Board of Directors shall be entitled to receive an Option to purchase 40,000 shares of Common Stock. Commencing on September 1, 2002, an Option to purchase 10,000 shares of Common Stock on the terms and conditions set forth herein shall be granted to each Non-Executive Director and thereafter on September 1st of each year; provided that any Non-Executive Director, who has not served as a director for an entire year prior to September 1^st of each year shall receive a pro rata number of options determined as follows:

Notwithstanding the foregoing, in the event a Non-Executive Director initially joins the Board of Directors on or after June 1, such Non-Executive Director shall not be eligible to be granted Options on September 1 of the year in which he or she first joined the Board of Directors.

(b) Grants to Advisors

(i) Each person who is appointed as an Advisor on an Advisory Board established or maintained by the Company shall, upon such appointment and on each anniversary of the effective date of his appointment, be granted options to purchase 5,000 shares for Advisors and options to purchase 7,500 shares for Advisors who are also chairmen of such Advisory Board, on the terms and conditions set forth herein.

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(ii) Notwithstanding the foregoing, no Advisor who may serve on an Advisory Board of the Company shall be entitled to receive any options under the Director Plan for serving as such advisor, and in no event will the grant amount, as defined above in Section 5(a)(ii), exceed $75,000 with respect to a grant to a chairman of an Advisory Board Director or $50,000 with respect to an Advisor on an annual basis to an Advisor. To the extent the grant amount exceeds the foregoing limitations, the number of shares subject to the Option to be granted to the Advisor will be reduced accordingly.

6. PURCHASE OPTION

A. Commencing December 17, 2003, each Non-Executive Director joining the Board of Directors after such date shall he have the right to purchase up to $100,000 of Common Stock during the initial twelve month period immediately following the date upon which the Non-Executive Director joins the Board of Directors. The purchase price for the Common Stock shall be equal to 80% of the Fair Market Value of the Common Stock on the date of purchase as determined in accordance were Section 7(b)hereof. The purchase right granted hereunder may be exercised in whole or in part at any time during the initial twelve month period.

B. Commencing July 1, 2009 and on July 1 of each year thereafter while this Plan is in effect, each Non-Executive Director shall have the right to elect, within thirty days from July 1, to receive a percentage (not to exceed 100%) of all cash compensation payable to such Non-Executive Director for the fiscal year ending the following June 30 in restricted shares of the Company’s Common Stock (“Restricted Shares”). Notwithstanding the foregoing, however, on one occasion during each fiscal quarter, a Non-Executive Director, prior to the first day of the last month of each fiscal quarter, may notify the Company of his decision to modify a prior election to allocate the payment of compensation between cash and Restricted Shares, with any such revised allocation to be effective for the fiscal quarter within which it is made and any for any subsequent fiscal quarter during the fiscal year that such revised allocation is made, unless again modified in accordance with this Section. In the event a Non-Executive Director elects to receive a percentage of his or her cash compensation in Restricted Shares, the number of Restricted Shares that will be issued to such a Non-Executive Director will be calculated by dividing the cash amount to be converted into Restricted Shares by the fair market value of the Company’s Common Stock as of the date the fees are earned. The closing price of the Company’s Common Stock on the last trading day of each fiscal quarter will be used to determine the fair market value of the Common Stock which may be issued in lieu of the fees paid for service as a director during such period. For the purposes of this Section 6, “fair market value” shall have the meaning ascribed to such phrase in Section 7, below, except that as used in this Section 6 the date of determination shall be such date or dates on which the applicable fees are earned. Restricted Shares will be restricted from public resale for a period of one year from the date of issuance and thereafter subject to the provisions of Rule 144, as adopted by the Securities and Exchange Commission under the Securities Act of 1933, as amended.

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7. OPTION PROVISIONS

Each Option shall be evidenced by a written agreement (“Stock Option Agreement”) and shall contain the following terms and conditions:

(a) The term of each Option commences on the date it is granted and, unless sooner terminated as set forth herein, expires on the date (“Expiration Date”) that is ten years from the date of grant. Options outstanding as of the date of the amendment to this Plan shall be deemed amended to provide that such options shall expire ten years from the date of grant, unless sooner terminated. The term of each Option may terminate sooner than such Expiration Date if the optionee’s service as a Non-Executive Director or Advisor of the Company terminates for any reason or for no reason. In the event of such termination of service, the Option shall terminate (i) for Non-Executive Directors, on the second anniversary of the date of termination of service as a director and (ii) for Advisors on the earlier of the Expiration Date or the date three (3) months following the date of termination of service. Notwithstanding the foregoing, (A) if termination of service is due to optionee’s death or permanent disability (as determined by the Board), the option shall terminate on the earlier of the Expiration Date or twelve (12) months following the date of the optionee’s death or termination of service for permanent disability and (B) if an optionee is removed from the Board (or Advisory Board) for cause, as determined by the Board, the option awards held by such optionee would terminate immediately upon removal. In any and all circumstances, an option may be exercised following termination of the optionee’s service as an Advisor only as to that number of shares as to which it was exercisable on the date of termination of such services.

(b) The exercise price of each option shall be one hundred percent (100%) of the Fair Market Value of the shares subject to such option on the date such option is granted. “Fair Market Value” of a share of Common Stock shall mean (i) if the Common Stock is traded on a national securities exchange or on the Nasdaq National Market System (“NMS”), the per share closing price of the Common Stock on the principal securities exchange on which they are listed or on NMS, as the case may be, on the date of grant (or if there is no closing price for such date of grant, then the last preceding business day on which there was a closing price); or (ii) if the Common Stock is traded in the over-the-counter market and listed on the small cap market of the Nasdaq Stock Market (“Nasdaq”), the per share closing bid price of the Common Stock on the date of grant as reported by Nasdaq (or if there is no closing bid price for such date of grant, then the last preceding business day on which there was a closing bid price); or (iii) if the Common Stock is traded in the over-the-counter market but bid quotations are not published on Nasdaq quotation system, the closing bid price per share for the Common Stock as furnished by a broker-dealer which regularly furnishes price quotations for the Common Stock.

(c) The optionee may elect to make payment of the exercise price under one of the following alternatives:

(i) Payment of the exercise price per share in cash at the time of exercise; or

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(ii) Recourse notes (subject to Paragraph 16 herein) or

(iii) Payment by a combination of the methods of payment specified in Subsections 7(c)(i) and 7(c)(ii) above.

(d) An option shall not be transferable except by will or by the laws of descent and distribution and shall be exercisable during the lifetime of the person to whom the option is granted only by such person or by his guardian or legal representative.

(e) All options granted under the Director Plan shall be non-qualified stock options, and do not qualify as incentive stock options within the meaning of Section 422, or any successor section, of the Internal Revenue Code of 1986, as amended.

8. ACCELERATION OF OPTIONS

Notwithstanding any contrary installment period with respect to any option and unless the Board or Committee determines otherwise, each outstanding option granted under the Director Plan shall become exercisable in full for the aggregate number of shares covered thereby in the event: (i) the Board (or, if approval of the stockholders is required as a matter of law, the stockholders of the Company) shall approve (a) any consolidation or merger of the Company in which the Company is not the continuing or surviving corporation or pursuant to which shares of shares of Common Stock would be converted into cash, securities or other property, other than a merger of the Company in which the holders of Common Stock immediately prior to the merger have the same proportionate ownership of common stock of the surviving corporation immediately after the merger, or (b) any sale, lease, exchange, or other transfer (in one transaction or a series of related transactions) of all, or substantially all, of the assets of the Company, or (c) the adoption of any plan or Proposal for the liquidation or dissolution of the Company; or (ii) any person (as such term is defined in Sections 13(d)(3) and 14(d)(2) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), corporation or other entity (other than the Company or any employee benefit plan sponsored by the Company or any Subsidiary) (a) shall purchase any Common Stock (or securities convertible into the Company’s Common Stock) for cash, securities or any other consideration pursuant to a tender offer or exchange offer, without the prior consent of the Board of Directors, or (b) shall become the “beneficial owner” (as such term is defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Company representing twenty-five percent (25%) or more of the combined voting power of the then outstanding securities of the Company ordinarily (and apart from rights accruing under special circumstances) having the right to vote in the election of Directors (calculated as provided in paragraph (d) of such Rule 13(d)(3) in the case of rights to acquire the Company’s Securities); or (iii) during any period of two consecutive years or less, individuals who at the beginning of such period constitute the entire Board of Directors shall cease for any reason to constitute a majority thereof unless the election, or the nomination for election by the Company’s stockholders, of each new director was approved by a vote of at least a majority of the directors then still in office. The Stock Option Agreement evidencing options

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granted under the Director Plan may contain such provisions limiting the acceleration of the exercise of Options as provided in this Section 8 as the Board or Committee deems appropriate to ensure that the penalty provisions of Section 4999 of the Code, or any successor thereto in effect at the time of such acceleration, will not apply to any stock received by a Non-Executive Director or Advisor from the Company.

9. RIGHT OF COMPANY TO TERMINATE SERVICES AS A NON-EXECUTIVE DIRECTOR OR ADVISOR

Nothing contained in the Director Plan or in any instrument executed pursuant hereto shall confer upon any Non-Executive Director or Advisor any right to continue in the service of the Company or any of its subsidiaries or interfere in any way with the right of the Company or a subsidiary to terminate the service of any Non-Executive Director or Advisor at any time, with or without cause.

10. NONALIENATION OF BENEFITS

No right or benefit under the Director Plan shall be subject to alienation, sale, assignment, hypothecation, pledge, exchange, transfer, encumbrance or charge, and any attempt to alienate, sell, assign, hypothecate, pledge, exchange, transfer, encumber or charge the same shall be void. No right or benefit hereunder shall in any manner be liable for or subject to the debts, contracts, liabilities or torts of the person entitled to such benefit.

11. ADJUSTMENTS UPON CHANGES IN CAPITALIZATION

All options granted under the Plan shall be deemed automatically adjusted (both in the number of shares and exercise price), as appropriate, for any corporate action adopted by the Board of Directors and/or shareholders which action results in changes in the outstanding Common Stock of the Company by reason of any stock dividend, distribution, split-up, recapitalization, combination or exchange of shares, merger, consolidation or liquidation and the like, and, in the event of any such change in the outstanding Common Stock, the aggregate number and class of shares available under the Director Plan and the number of shares subject to nondiscretionary grants pursuant to Section 5 hereof shall be appropriately adjusted.

12. TERMINATION AND AMENDMENT

Unless the Director Plan shall theretofore have been terminated as hereinafter provided, no grant of Options may be made under the Director Plan after a date which is ten years from the date of adoption of the Director Plan by the Board of Directors. The Board or Committee may at any time amend, alter, suspend or terminate the Director plan; provided, however, that the Board or Committee may not, without the requisite vote of the stockholders of the Company approving such action (i) materially increase (except as provided in Section 10 hereof) the maximum number of shares which may be issued under the Director Plan; (ii) extend the term of the Director Plan; (iii) materially increase the requirements as to eligibility for

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participation in the Director Plan; or (iv) materially increase the benefits accruing to participants under the Director Plan. No termination, modification or amendment of the Director Plan or any outstanding Stock Option Agreement may without the consent of the Non-Executive Director or Advisor to whom any option shall theretofore have been granted, adversely affect the rights of such Director with respect to such option.

13. EFFECTIVENESS OF THE PLAN

The Director Plan shall become effective upon the requisite vote of the stockholders of the Company approving such action, and upon the approvals, if required, of any other public authorities. Any grant of options under the Director Plan prior to such approval shall be expressly subject to the condition that the Director Plan shall have been so approved. Unless the Director Plan shall be so approved, the Director Plan and all options theretofore made thereunder shall be and become null and void.

14. GOVERNMENT AND OTHER REGULATIONS

The obligation of the Company with respect to options shall be subject to (i) all applicable laws, rules and regulations and such approvals by any governmental agencies as may be required, including, without limitation, the effectiveness of a registration statement under the Securities Act of 1933, and (ii) the rules and regulations of any securities exchange on which the Common Stock may be listed.

15. COMPLIANCE WITH SEC REGULATION SECTION 16(B)

In the case of optionees who are or may be subject to Section 16 of the Securities and Exchange Act of 1934, as amended (and the rules and regulations promulgated thereunder) (the “1934 Act”), it is the intent of the Company that the Plan and any award granted hereunder satisfy and be interpreted in a manner that satisfies the applicable requirements of Rule 16b-3. This is so that such persons will be entitled to the benefits of Rule 16b-3 or other exemptive rules under Section 16 of the 1934 Act and will not be subjected to liability thereunder. If any provision of the Plan or any award would otherwise conflict with the intent expressed herein, that provision, to the extent possible, shall be interpreted and deemed amended so as to avoid such conflict. To the extent of any remaining irreconcilable conflict with such intent, such provision shall be deemed void as applicable to optionees who are or may be subject to Section 16 of the 1934 Act.

16. TAX WITHHOLDING.

It shall be a condition to the obligation of the Company to deliver shares or securities of the Company upon exercise of an award, that the grantee of such award pay to the Company such amount as may be requested by the Company for the purpose of satisfying any liability for any federal, state or local income or other taxes required by law to be withheld. The Board or

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Committee may, in its sole discretion, permit the grantee of an award, in accordance with any applicable regulations of the authority issuing such regulations, to pay a portion or all of the amount of such minimum required or additional permitted withholding taxes in shares. At the Board’s or Committee’s sole discretion, the grantee shall be permitted to authorize the Company to withhold, or shall agree to surrender back to the Company, on or about the date such withholding tax liability is determinable, shares previously owned by such grantee or a portion of the shares that were or otherwise would be distributed to such grantee pursuant to such award having a fair market value equal (as determined under Section 6 hereof) to the amount of such required or permitted withholding taxes to be paid in shares.

17. LOANS TO GRANTEES.

The Board or Committee, acting on behalf of the Company, shall have the authority and may, in its sole discretion, lend money to, or guaranty any obligation of, a grantee for the purpose of enabling such grantee to exercise an option granted hereunder; the amount of such loan or obligation, however, shall be limited to an amount equal to fifty (50%) percent of the exercise price of such option. Any loan made hereunder shall bear interest at the rate of ten (10%) percent per annum; may be unsecured or secured in such manner as the Board or Committee shall determine, including, without limitation, a pledge of the subject shares; and shall be subject to such other terms and conditions as the Board or Committee may determine.

18. NO OBLIGATION TO EXERCISE OPTION.

The granting of an award shall impose no obligation upon the grantee (or upon a transferee of a grantee) to exercise such award.

19. NO LIMITATION ON RIGHTS OF THE COMPANY.

The grant of any award shall not in any way affect the right or power of the Company to make adjustments, reclassification, or changes in its capital or business structure to merge, consolidate, dissolve, liquidate or sell or transfer all or any part of its business or assets.

20. EXPENSES OF THE PLAN.

All of the expenses of the Plan shall be paid by the Company.

21. GRANTEE TO HAVE NO RIGHTS AS A STOCKHOLDER.

No grantee of any option shall have any rights as a stockholder with respect to any shares subject to his or her option prior to the date on which he or she is recorded as the holder of such shares on the records of the Company. No grantee of any option shall have the rights of a stockholder until he or she has paid in full the option price.

22. GOVERNING LAW

The Director Plan shall be governed by, and construed in accordance with, the laws of the State of Delaware.

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