THIS WARRANT AND THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF THIS
      WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
      AMENDED, OR ANY STATE SECURITIES LAWS. THIS WARRANT AND THE COMMON STOCK
      ISSUABLE UPON EXERCISE OF THIS WARRANT MAY NOT BE SOLD, OFFERED FOR SALE,
      PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
      STATEMENT AS TO THIS WARRANT UNDER SAID ACT AND ANY APPLICABLE STATE
      SECURITIES LAWS OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO
      SCIENCE DYNAMICS CORPORATION THAT SUCH REGISTRATION IS NOT REQUIRED.

           Right to Purchase up to 6,000,000 Shares of Common Stock of
                          Science Dynamics Corporation
                          ----------------------------
                   (subject to adjustment as provided herein)

                              AMENDED AND RESTATED
                          COMMON STOCK PURCHASE WARRANT

No. _________________                             Issue Date:  February 11, 2005

      SCIENCE DYNAMICS CORPORATION, a corporation organized under the laws of
the State of Delaware ("Science Dynamics Corporation"), hereby certifies that,
for value received, LAURUS MASTER FUND, LTD., or assigns (the "Holder"), is
entitled, subject to the terms set forth below, to purchase from the Company (as
defined herein) from and after the Issue Date of this Warrant and at any time or
from time to time before 5:00 p.m., New York time, through the close of business
February 11, 2012 (the "Expiration Date"), up to 6,000,000 fully paid and
nonassessable shares of Common Stock (as hereinafter defined), $0.01 par value
per share, at the applicable Exercise Price per share (as defined below). The
number and character of such shares of Common Stock and the applicable Exercise
Price per share are subject to adjustment as provided herein.

      As used herein the following terms, unless the context otherwise requires,
have the following respective meanings:

            (a) The term "Company" shall include Science Dynamics Corporation
      and any corporation which shall succeed, or assume the obligations of,
      Science Dynamics Corporation hereunder.

            (b) The term "Common Stock" includes (i) the Company's Common Stock,
      par value $0.01 per share; and (ii) any other securities into which or for
      which any of the securities described in the preceding clause (i) may be
      converted or exchanged pursuant to a plan of recapitalization,
      reorganization, merger, sale of assets or otherwise.

            (c) The term "Other Securities" refers to any stock (other than
      Common Stock) and other securities of the Company or any other person
      (corporate or otherwise) which the holder of the Warrant at any time shall
      be entitled to receive, or shall have received, on the exercise of the
      Warrant, in lieu of or in addition to Common Stock, or which at any time
      shall be issuable or shall have been issued in exchange for or in
      replacement of Common Stock or Other Securities pursuant to Section 4 or
      otherwise.

<PAGE>

            (d) The "Exercise Price" applicable under this Warrant shall be
      $0.11;

1. Exercise of Warrant.

      1.1 Number of Shares Issuable upon Exercise. From and after the date
hereof through and including the Expiration Date, the Holder shall be entitled
to receive, upon exercise of this Warrant in whole or in part, by delivery of an
original or fax copy of an exercise notice in the form attached hereto as
Exhibit A (the "Exercise Notice"), shares of Common Stock of the Company,
subject to adjustment pursuant to Section 4.

      1.2 Fair Market Value. For purposes hereof, the "Fair Market Value" of a
share of Common Stock as of a particular date (the "Determination Date") shall
mean:

            (a) If the Company's Common Stock is traded on the American Stock
      Exchange or another national exchange or is quoted on the National or
      SmallCap Market of The Nasdaq Stock Market, Inc.("Nasdaq"), then the
      closing or last sale price, respectively, reported for the last business
      day immediately preceding the Determination Date.

            (b) If the Company's Common Stock is not traded on the American
      Stock Exchange or another national exchange or on the Nasdaq but is traded
      on the NASD OTC Bulletin Board, then the mean of the average of the
      closing bid and asked prices reported for the last business day
      immediately preceding the Determination Date.

            (c) Except as provided in clause (d) below, if the Company's Common
      Stock is not publicly traded, then as the Holder and the Company agree or
      in the absence of agreement by arbitration in accordance with the rules
      then in effect of the American Arbitration Association, before a single
      arbitrator to be chosen from a panel of persons qualified by education and
      training to pass on the matter to be decided.

            (d) If the Determination Date is the date of a liquidation,
      dissolution or winding up, or any event deemed to be a liquidation,
      dissolution or winding up pursuant to the Company's charter, then all
      amounts to be payable per share to holders of the Common Stock pursuant to
      the charter in the event of such liquidation, dissolution or winding up,
      plus all other amounts to be payable per share in respect of the Common
      Stock in liquidation under the charter, assuming for the purposes of this
      clause (d) that all of the shares of Common Stock then issuable upon
      exercise of the Warrant are outstanding at the Determination Date.

      1.3 Company Acknowledgment. The Company will, at the time of the exercise
of the Warrant, upon the request of the holder hereof acknowledge in writing its
continuing obligation to afford to such holder any rights to which such holder
shall continue to be entitled after such exercise in accordance with the
provisions of this Warrant. If the holder shall fail to make any such request,
such failure shall not affect the continuing obligation of the Company to afford
to such holder any such rights.

                                        2
<PAGE>

      1.4 Trustee for Warrant Holders. In the event that a bank or trust company
shall have been appointed as trustee for the holders of the Warrant pursuant to
Subsection 3.2, such bank or trust company shall have all the powers and duties
of a warrant agent (as hereinafter described) and shall accept, in its own name
for the account of the Company or such successor person as may be entitled
thereto, all amounts otherwise payable to the Company or such successor, as the
case may be, on exercise of this Warrant pursuant to this Section 1.

2. Procedure for Exercise.

      2.1 Delivery of Stock Certificates, Etc., on Exercise. The Company agrees
that the shares of Common Stock purchased upon exercise of this Warrant shall be
deemed to be issued to the Holder as the record owner of such shares as of the
close of business on the date on which this Warrant shall have been surrendered
and payment made for such shares in accordance herewith. As soon as practicable
after the exercise of this Warrant in full or in part, and in any event within
three (3) business days thereafter, the Company at its expense (including the
payment by it of any applicable issue taxes) will cause to be issued in the name
of and delivered to the Holder, or as such Holder (upon payment by such Holder
of any applicable transfer taxes) may direct in compliance with applicable
securities laws, a certificate or certificates for the number of duly and
validly issued, fully paid and nonassessable shares of Common Stock (or Other
Securities) to which such Holder shall be entitled on such exercise, plus, in
lieu of any fractional share to which such holder would otherwise be entitled,
cash equal to such fraction multiplied by the then Fair Market Value of one full
share, together with any other stock or other securities and property (including
cash, where applicable) to which such Holder is entitled upon such exercise
pursuant to Section 1 or otherwise.

      2.2 Exercise. Payment may be made either (i) in cash or by certified or
official bank check payable to the order of the Company equal to the applicable
aggregate Exercise Price, (ii) by delivery of the Warrant, or shares of Common
Stock and/or Common Stock receivable upon exercise of the Warrant in accordance
with the formula set forth below in this Section 2.2, or (iii) by a combination
of any of the foregoing methods, for the number of Common Shares specified in
such Exercise Notice (as such exercise number shall be adjusted to reflect any
adjustment in the total number of shares of Common Stock issuable to the Holder
per the terms of this Warrant) and the Holder shall thereupon be entitled to
receive the number of duly authorized, validly issued, fully-paid and
non-assessable shares of Common Stock (or Other Securities) determined as
provided herein. Notwithstanding any provisions herein to the contrary, if the
Fair Market Value of one share of Common Stock is greater than the Exercise
Price (at the date of calculation as set forth below), in lieu of exercising
this Warrant for cash, the Holder may elect to receive shares equal to the value
(as determined below) of this Warrant (or the portion thereof being exercised)
by surrender of this Warrant at the principal office of the Company together
with the properly endorsed Exercise Notice in which event the Company shall
issue to the Holder a number of shares of Common Stock computed using the
following formula:

                                        3
<PAGE>

         X=Y            (A-B)
                       -------
                          A

         Where X =     the number of shares of Common Stock to be issued to the
                       Holder

         Y =           the number of shares of Common Stock purchasable under
                       the Warrant or, if only a portion of the Warrant is being
                       exercised, the portion of the Warrant being exercised
                       (at the date of such calculation)

         A =           the Fair Market  Value of one share of the  Company's
                       Common Stock (at the date of such calculation)

         B =           Exercise Price (as adjusted to the date of such
                       calculation)

3. Effect of Reorganization, Etc.; Adjustment of Exercise Price.

      3.1 Reorganization, Consolidation, Merger, Etc. In case at any time or
from time to time, the Company shall (a) effect a reorganization, (b)
consolidate with or merge into any other person, or (c) transfer all or
substantially all of its properties or assets to any other person under any plan
or arrangement contemplating the dissolution of the Company, then, in each such
case, as a condition to the consummation of such a transaction, proper and
adequate provision shall be made by the Company whereby the Holder of this
Warrant, on the exercise hereof as provided in Section 1 at any time after the
consummation of such reorganization, consolidation or merger or the effective
date of such dissolution, as the case may be, shall receive, in lieu of the
Common Stock (or Other Securities) issuable on such exercise prior to such
consummation or such effective date, the stock and other securities and property
(including cash) to which such Holder would have been entitled upon such
consummation or in connection with such dissolution, as the case may be, if such
Holder had so exercised this Warrant, immediately prior thereto, all subject to
further adjustment thereafter as provided in Section 4.

      3.2 Dissolution. In the event of any dissolution of the Company following
the transfer of all or substantially all of its properties or assets, the
Company, concurrently with any distributions made to holders of its Common
Stock, shall at its expense deliver or cause to be delivered to the Holder the
stock and other securities and property (including cash, where applicable)
receivable by the Holder of the Warrant pursuant to Section 3.1, or, if the
Holder shall so instruct the Company, to a bank or trust company specified by
the Holder and having its principal office in New York, NY as trustee for the
Holder of the Warrant (the "Trustee").

      3.3 Continuation of Terms. Upon any reorganization, consolidation, merger
or transfer (and any dissolution following any transfer) referred to in this
Section 3, this Warrant shall continue in full force and effect and the terms
hereof shall be applicable to the shares of stock and other securities and
property receivable on the exercise of this Warrant after the consummation of
such reorganization, consolidation or merger or the effective date of
dissolution following any such transfer, as the case may be, and shall be
binding upon the issuer of any such stock or other securities, including, in the
case of any such transfer, the person acquiring all or substantially all of the
properties or assets of the Company, whether or not such person shall have
expressly assumed the terms of this Warrant as provided in Section 4. In the
event this Warrant does not continue in full force and effect after the
consummation of the transactions described in this Section 3, then the Company's
securities and property (including cash, where applicable) receivable by the
Holders of the Warrant will be delivered to Holder or the Trustee as
contemplated by Section 3.2.

                                        4
<PAGE>

4.    Extraordinary Events Regarding Common Stock. In the event that the Company
      shall (a) issue additional shares of the Common Stock as a dividend or
      other distribution on outstanding Common Stock, (b) subdivide its
      outstanding shares of Common Stock, or (c) combine its outstanding shares
      of the Common Stock into a smaller number of shares of the Common Stock,
      then, in each such event, the Exercise Price shall, simultaneously with
      the happening of such event, be adjusted by multiplying the then Exercise
      Price by a fraction, the numerator of which shall be the number of shares
      of Common Stock outstanding immediately prior to such event and the
      denominator of which shall be the number of shares of Common Stock
      outstanding immediately after such event, and the product so obtained
      shall thereafter be the Exercise Price then in effect. The Exercise Price,
      as so adjusted, shall be readjusted in the same manner upon the happening
      of any successive event or events described herein in this Section 4. The
      number of shares of Common Stock that the holder of this Warrant shall
      thereafter, on the exercise hereof as provided in Section 1, be entitled
      to receive shall be adjusted to a number determined by multiplying the
      number of shares of Common Stock that would otherwise (but for the
      provisions of this Section 4) be issuable on such exercise by a fraction
      of which (a) the numerator is the Exercise Price that would otherwise (but
      for the provisions of this Section 4) be in effect, and (b) the
      denominator is the Exercise Price in effect on the date of such exercise.

5.    Certificate as to Adjustments. In each case of any adjustment or
      readjustment in the shares of Common Stock (or Other Securities) issuable
      on the exercise of the Warrant, the Company at its expense will promptly
      cause its Chief Financial Officer or other appropriate designee to compute
      such adjustment or readjustment in accordance with the terms of the
      Warrant and prepare a certificate setting forth such adjustment or
      readjustment and showing in detail the facts upon which such adjustment or
      readjustment is based, including a statement of (a) the consideration
      received or receivable by the Company for any additional shares of Common
      Stock (or Other Securities) issued or sold or deemed to have been issued
      or sold, (b) the number of shares of Common Stock (or Other Securities)
      outstanding or deemed to be outstanding, and (c) the Exercise Price and
      the number of shares of Common Stock to be received upon exercise of this
      Warrant, in effect immediately prior to such adjustment or readjustment
      and as adjusted or readjusted as provided in this Warrant. The Company
      will forthwith mail a copy of each such certificate to the holder of the
      Warrant and any Warrant agent of the Company (appointed pursuant to
      Section 11 hereof).

6.    Reservation of Stock, Etc., Issuable on Exercise of Warrant. The Company
      will at all times reserve and keep available, solely for issuance and
      delivery on the exercise of the Warrant, shares of Common Stock (or Other
      Securities) from time to time issuable on the exercise of the Warrant.

7.    Assignment; Exchange of Warrant. Subject to compliance with applicable
      securities laws, this Warrant, and the rights evidenced hereby, may be
      transferred by any registered holder hereof (a "Transferor") in whole or
      in part. On the surrender for exchange of this Warrant, with the
      Transferor's endorsement in the form of Exhibit B attached hereto (the
      "Transferor Endorsement Form") and together with evidence reasonably
      satisfactory to the Company demonstrating compliance with applicable
      securities laws, which shall include, without limitation, the provision of
      a legal opinion from the Transferor's counsel (at the Company's expense)
      that such transfer is exempt from the registration requirements of
      applicable securities laws, and with payment by the Transferor of any
      applicable transfer taxes) will issue and deliver to or on the order of
      the Transferor thereof a new Warrant of like tenor, in the name of the
      Transferor and/or the transferee(s) specified in such Transferor
      Endorsement Form (each a "Transferee"), calling in the aggregate on the
      face or faces thereof for the number of shares of Common Stock called for
      on the face or faces of the Warrant so surrendered by the Transferor.

                                        5
<PAGE>

8.    Replacement of Warrant. On receipt of evidence reasonably satisfactory to
      the Company of the loss, theft, destruction or mutilation of this Warrant
      and, in the case of any such loss, theft or destruction of this Warrant,
      on delivery of an indemnity agreement or security reasonably satisfactory
      in form and amount to the Company or, in the case of any such mutilation,
      on surrender and cancellation of this Warrant, the Company at its expense
      will execute and deliver, in lieu thereof, a new Warrant of like tenor.

9.    Reserved.

10.   Maximum Exercise. Notwithstanding anything herein to the contrary, in no
      event shall the Holder be entitled to exercise any portion of this Warrant
      in excess of that portion of this Warrant upon exercise of which the sum
      of (1) the number of shares of Common Stock beneficially owned by the
      Holder and its Affiliates (other than shares of Common Stock which may be
      deemed beneficially owned through the ownership of the unexercised portion
      of the Warrant or the unexercised or unconverted portion of any other
      security of the Holder subject to a limitation on conversion analogous to
      the limitations contained herein) and (2) the number of shares of Common
      Stock issuable upon the exercise of the portion of this Warrant with
      respect to which the determination of this proviso is being made, would
      result in beneficial ownership by the Holder and its Affiliates of any
      amount greater than 9.99% of the then outstanding shares of Common Stock
      (whether or not, at the time of such exercise, the Holder and its
      Affiliates beneficially own more than 9.99% of the then outstanding shares
      of Common Stock). As used herein, the term "Affiliate" means any person or
      entity that, directly or indirectly through one or more intermediaries,
      controls or is controlled by or is under common control with a person or
      entity, as such terms are used in and construed under Rule 144 under the
      Securities Act. For purposes of the proviso to the second preceding
      sentence, beneficial ownership shall be determined in accordance with
      Section 13(d) of the Securities Exchange Act of 1934, as amended, and
      Regulations 13D-G thereunder, except as otherwise provided in clause (1)
      of such proviso. The limitations set forth herein (x) may be waived by the
      Holder upon provision of no less than seventy-five (75) days prior notice
      to the Company and (y) shall automatically become null and void following
      notice to the Company upon the occurrence and during the continuance of an
      Event of Default (as defined in the Note referred to in the Purchase
      Agreement dated as of the date hereof among the Holder and the Company (as
      amended, modified, restated and/or supplemented from time to time, the
      "Purchase Agreement")).

                                        6
<PAGE>

11.   Warrant Agent. The Company may, by written notice to the each Holder of
      the Warrant, appoint an agent for the purpose of issuing Common Stock (or
      Other Securities) on the exercise of this Warrant pursuant to Section 1,
      exchanging this Warrant pursuant to Section 7, and replacing this Warrant
      pursuant to Section 8, or any of the foregoing, and thereafter any such
      issuance, exchange or replacement, as the case may be, shall be made at
      such office by such agent.

12.   Transfer on the Company's Books. Until this Warrant is transferred on the
      books of the Company, the Company may treat the registered holder hereof
      as the absolute owner hereof for all purposes, notwithstanding any notice
      to the contrary.

13.   Notices, Etc. All notices and other communications from the Company to the
      Holder of this Warrant shall be mailed by first class registered or
      certified mail, postage prepaid, at such address as may have been
      furnished to the Company in writing by such Holder or, until any such
      Holder furnishes to the Company an address, then to, and at the address
      of, the last Holder of this Warrant who has so furnished an address to the
      Company.

14.   Miscellaneous. This Warrant and any term hereof may be changed, waived,
      discharged or terminated only by an instrument in writing signed by the
      party against which enforcement of such change, waiver, discharge or
      termination is sought. This Warrant shall be governed by and construed in
      accordance with the laws of State of New York without regard to principles
      of conflicts of laws. Any action brought concerning the transactions
      contemplated by this Warrant shall be brought only in the state courts of
      New York or in the federal courts located in the state of New York;
      provided, however, that the Holder may choose to waive this provision and
      bring an action outside the state of New York. The individuals executing
      this Warrant on behalf of the Company agree to submit to the jurisdiction
      of such courts and waive trial by jury. The prevailing party shall be
      entitled to recover from the other party its reasonable attorney's fees
      and costs. In the event that any provision of this Warrant is invalid or
      unenforceable under any applicable statute or rule of law, then such
      provision shall be deemed inoperative to the extent that it may conflict
      therewith and shall be deemed modified to conform with such statute or
      rule of law. Any such provision which may prove invalid or unenforceable
      under any law shall not affect the validity or enforceability of any other
      provision of this Warrant. The headings in this Warrant are for purposes
      of reference only, and shall not limit or otherwise affect any of the
      terms hereof. The invalidity or unenforceability of any provision hereof
      shall in no way affect the validity or enforceability of any other
      provision hereof. The Company acknowledges that legal counsel participated
      in the preparation of this Warrant and, therefore, stipulates that the
      rule of construction that ambiguities are to be resolved against the
      drafting party shall not be applied in the interpretation of this Warrant
      to favor any party against the other party.

                   [BALANCE OF PAGE INTENTIONALLY LEFT BLANK;
                            SIGNATURE PAGE FOLLOWS.]


                                        7
<PAGE>

      IN WITNESS WHEREOF, the Company has executed this Warrant as of the date
first written above.

                                               SCIENCE DYNAMICS CORPORATION

WITNESS:
                                               By:       /s/ Paul Burgess
                                                         -----------------------
                                               Name:     Paul Burgess
                                                         -----------------------
                                               Title:    Chief Executive Officer
--------------------------------------------             -----------------------








                                        8
<PAGE>

                                    EXHIBIT A

                              FORM OF SUBSCRIPTION
                   (To Be Signed Only On Exercise Of Warrant)


TO:   Science Dynamics Corporation


      Attention:   Chief Financial Officer

      The undersigned, pursuant to the provisions set forth in the attached
Warrant (No.____), hereby irrevocably elects to purchase (check applicable box):

________    ________ shares of the Common Stock covered by such Warrant; or

________    the maximum number of shares of Common Stock covered by such Warrant
            pursuant to the cashless exercise procedure set forth in Section 2.


      The undersigned herewith makes payment of the full Exercise Price for such
shares at the price per share provided for in such Warrant, which is
$___________. Such payment takes the form of (check applicable box or boxes):

________    $__________ in lawful money of the United States; and/or

________    the cancellation of such portion of the attached Warrant as is
            exercisable for a total of _______ shares of Common Stock (using a
            Fair Market Value of $_______ per share for purposes of this
            calculation); and/or

________    the cancellation of such number of shares of Common Stock as is
            necessary, in accordance with the formula set forth in Section 2.2,
            to exercise this Warrant with respect to the maximum number of
            shares of Common Stock purchasable pursuant to the cashless exercise
            procedure set forth in Section 2.


      The undersigned requests that the certificates for such shares be issued
in the name of, and delivered to _________________________________________ whose
address is_____________________________________________________________________.

      The undersigned represents and warrants that all offers and sales by the
undersigned of the securities issuable upon exercise of the within Warrant shall
be made pursuant to registration of the Common Stock under the Securities Act of
1933, as amended (the "Securities Act") or pursuant to an exemption from
registration under the Securities Act.

Dated:_________________________    ____________________________________________
                                   (Signature must conform to name of holder as
                                   specified on the face of the Warrant)

                                   Address:____________________________________
                                           ____________________________________


                                       A-1
<PAGE>

                                    EXHIBIT B

                         FORM OF TRANSFEROR ENDORSEMENT
                   (To Be Signed Only On Transfer Of Warrant)

      For value received, the undersigned hereby sells, assigns, and transfers
unto the person(s) named below under the heading "Transferees" the right
represented by the within Warrant to purchase the percentage and number of
shares of Common Stock of Science Dynamics Corporation into which the within
Warrant relates specified under the headings "Percentage Transferred" and
"Number Transferred," respectively, opposite the name(s) of such person(s) and
appoints each such person Attorney to transfer its respective right on the books
of Science Dynamics Corporation with full power of substitution in the premises.

                                           Percentage            Number
Transferees           Address              Transferred         Transferred
-----------           -------              -----------         -----------


-----------------     ------------------   --------------    ----------------


-----------------     ------------------   --------------    ----------------


-----------------     ------------------   --------------    ----------------


-----------------     ------------------   --------------    ----------------


Dated:
      --------------------------   --------------------------------------------
                                   (Signature must conform to name of holder as
                                   specified on the face of the Warrant)

                                   Address:____________________________________
                                           ____________________________________


                                   SIGNED IN THE PRESENCE OF:


                                   ---------------------------------------------
                                                     (Name)
ACCEPTED AND AGREED:
[TRANSFEREE]



---------------------------------
             (Name)


                                       B-1