Document:

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                                                                    EXHIBIT 10.2

                                CLOSING AGREEMENT

         This Closing Agreement (this "Agreement") among Schlumberger Limited, a
Netherlands Antilles corporation ("Schlumberger"), Schlumberger Oilfield
Holdings Limited, an International Business Company of the British Virgin
Islands wholly owned by Schlumberger ("SOHL"), Schlumberger Plc, a United
Kingdom limited liability company wholly owned by Schlumberger ("SPLC"),
Schlumberger B.V., a Netherlands limited liability company wholly owned by
Schlumberger ("SLBV"), Schlumberger Technology Corporation, a Texas corporation
wholly owned by Schlumberger ("STC"), and Baker Hughes Incorporated, a Delaware
corporation ("Baker Hughes"), is made as of November 30, 2000.

         WHEREAS, Schlumberger, SOHL, SPLC, SLBV, STC and Baker Hughes are
parties to that certain Master Formation Agreement dated as of September 6, 2000
(the "Master Formation Agreement"; capitalized terms this Agreement uses, but
does not define, have the respective meanings the Master Formation Agreement
specifies); and

         WHEREAS, the parties hereto desire to amend the Master Formation
Agreement in certain respects pursuant to Section 10.3 thereof;

         NOW, THEREFORE, in consideration of the premises and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereby agree as follows:

         1. Amendments to the Master Formation Agreement. The parties hereto
agree that, in accordance with Section 10.3 of the Master Formation Agreement,
the Master Formation Agreement shall be amended as follows:

         (a) A new definition of "Closing Agreement" shall be added to Section
1.1 of the Master Formation Agreement as follows:

                  ""CLOSING AGREEMENT" means the Closing Agreement dated as of
         the Closing Date executed by the parties hereto."

         (b) A new definition of "Nominee Agreement" shall be added to Section
1.1 of the Master Formation Agreement as follows:

                  ""NOMINEE AGREEMENT" means the Nominee Agreement dated as of
         the Closing Date executed by Baker Hughes, BVI Venture Entity and Dutch
         Venture Entity."

         (c) A new definition of "Personnel Leasing Agreement" shall be added to
Section 1.1 of the Master Formation Agreement as follows:

                  ""PERSONNEL LEASING AGREEMENT" means the Personnel Leasing
         Agreement dated as of the Closing Date executed by GECO Resources, Inc.
         and GECO Holdings L.L.C."

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         (d) A new definition of "Secondment Agreements" shall be added to
Section 1.1 of the Master Formation Agreement as follows:

                  ""SECONDMENT AGREEMENTS" means the following Secondment
         Agreements dated as of the Closing Date:

                  (i) the US Secondment Agreement between STC and US EmployCo;

                  (ii) the US Secondment Agreement between Baker Hughes and US
         EmployCo;

                  (iii) the Canada Secondment Agreement between Schlumberger
         Canada Limited and Western GECO Canada Limited; and

                  (iv) the Canada Secondment Agreement between Baker Hughes
         Canada Company and Western GECO Canada Limited."

         (e) The definition of Top-Up Amount in Section 1.1 of the Master
Formation Agreement shall be amended in its entirety as follows:

                  ""TOP-UP AMOUNT" has the meaning given such term in Section
         2.2(b)."

         (f) The definition of "Transaction Documents" in Section 1.1 of the
Master Formation Agreement is hereby amended in its entirety as follows:

                  ""TRANSACTION DOCUMENTS" means this Agreement, the Transfer
         Documents, the Charter Documents for the Venture Entities, the
         Shareholders' Agreement, the Sublease, the Shared Services Agreement,
         the Transition Services Agreement, the Employee Matters Agreement, the
         Secondment Agreements, the Personnel Leasing Agreement, the Closing
         Agreement and the Nominee Agreement."

         (g) The definition of "Venture" in Section 1.1 of the Master Formation
Agreement is hereby amended in its entirety as follows:

                  ""VENTURE" means the overall business relationship
         constituting a venture contemplated by this Agreement and includes all
         of the Venture Entities; provided, however, for purposes of Article 11
         of this Agreement, the term "Venture" shall specifically exclude US
         EmployCo."

         (h) Subpart (i) of Section 2.1(b) of the Master Formation Agreement
shall be amended in its entirety as follows:

                  "At or prior to the Closing, Baker Hughes or an Affiliate of
         Baker Hughes shall contribute to the Dutch Venture Entity in exchange
         for shares of the Dutch Venture Entity all the shares of Western Geo
         Canada Ltd, such shares having a fair market value of US $8,000,000,
         and Schlumberger or an Affiliate of Schlumberger shall contribute to
         the Dutch Venture Entity in exchange for shares

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         of the Dutch Venture Entity a portion of the net assets of SLBV and its
         Affiliates that are primarily related to the Seismic Business in the
         Dutch Countries, such portion of the net assets of SLBV and its
         Affiliates having a fair market value sufficient to give Schlumberger
         or an Affiliate of Schlumberger a 70% interest in the Dutch Venture
         Entity.

         (i) Section 2.2 of the Master Formation Agreement shall be amended to
read in its entirety as follows:

         2.2 Purchases by SLBV and SOHL.

         "(a) The parties have arranged for a third-party valuation of the
Schlumberger Transferred Assets and the Baker Hughes Transferred Assets by
PricewaterhouseCoopers LLP. The parties shall cooperate to complete such
valuation on or before December 31, 2000. To the extent that the valuation
materially differs from the amounts paid at Closing pursuant to Sections
2.1(a)(iii), 2.1(b)(iv), and 2.1(c)(iii), the parties shall appropriately adjust
the allocation of the amounts paid pursuant to those sections; provided, that
the allocation of the agreed Percentage Interests in each Venture Entity is not
affected, and Baker Hughes is not adversely impacted by the adjusted allocation.
Schlumberger agrees that the valuation shall not affect the aggregate purchase
price paid for the Baker Hughes Transferred Assets under this Section 2.2.

         (b) The parties agree that the aggregate cash purchase price to be paid
for a portion of the Baker Hughes equity ownership interest in US Venture Entity
pursuant to Section 2.1(a) and for the Baker Hughes Transferred Assets
transferred pursuant to Section 2.1(b)(iv) and Section 2.1(c)(iii) shall not
exceed US$493.36 million. The parties further agree that the price to be paid
for the Baker Hughes Transferred Assets transferred pursuant to Section
2.1(b)(iv) and Section 2.1(c)(iii), collectively, shall be in an amount equal to
US$493.36 million less (i) the amount of cash paid for a portion of the Baker
Hughes equity ownership interest in US Venture Entity pursuant to Section 2.1(a)
and (ii) to the extent such a payment for assets would result in an adverse
financial impact on Schlumberger or its Affiliates, an amount not to exceed
US$20 million (the "TOP-UP AMOUNT"). The Top-Up Amount shall be paid to Baker
Hughes or its Affiliates by SOHL or SLBV or their respective Affiliates, as
appropriate, in cash.

         (c) The parties agree that the purchase of assets and contribution of
those assets to each of the Venture Entities hereunder shall be allocated among
the Venture Entities in a manner to achieve a 70%/30% split of the net assets
transferred by Schlumberger Transferring Entities and Baker Hughes Transferring
Entities, respectively, to each Venture Entity."

         (j) Section 3.4 of the Master Formation Agreement shall be amended in
its entirety as follows:

                  "Upon the Closing, Schlumberger and Baker Hughes shall cause
         their respective subsidiaries listed on Exhibit 2.6 to contribute to
         the applicable Venture Entity an amount of cash (or, in the case of
         Baker Hughes, accounts

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         receivable as described in Section 3.3) as working capital, which
         amount shall be agreed upon between the parties at least 30 days prior
         to the Closing; provided, however, that Baker Hughes and its Affiliates
         collectively shall not be required to contribute more than an aggregate
         total of US $8,360,000 and Schlumberger and its Affiliates collectively
         shall not be required to contribute more than an aggregate total of US
         $35,000,000. The parties agree that the contributions of working
         capital under this Section 3.4 shall not effect the 70%/30% ownership
         split of the Venture Entities.

         (k) Section 3.10(a) of the Master Formation Agreement shall be amended
by deleting "US$500" in the last sentence thereof and replacing it with
"US$493.36."

         (l) Subpart (v) of Section 8.1(a) of the Master Formation Agreement
shall be amended in its entirety as follows:

                  "(v) any payments required in connection with the post-Closing
         termination following a formal decision of the Venture to so terminate
         of any agency Contract specifically listed in Schedule A to the Closing
         Agreement or otherwise primarily related to the Schlumberger Seismic
         Business or the Baker Hughes Seismic Business and in each case provided
         that such Contract is for valid services and duly documented"

         (m) The current subparts (v) and (vi) of Section 8.2(a) of the Master
Formation Agreement shall be redesignated as subparts (vi) and (vii).

         (n) A new subpart (v) shall be added to Section 8.2(a) of the Master
Formation Agreement as follows:

                  "(v) any Claims against, or Loss of, a Venture Entity, US
         EmployCo or their respective Affiliates arising out of or relating to
         any activity outside the Baker Hughes Seismic Business prior to
         Closing;"

         (o) The current subparts (v) and (vi) of Section 8.3(a) of the Master
Formation Agreement shall be redesignated as subparts (vi) and (vii).

         (p) A new subpart (v) shall be added to Section 8.3(a) of the Master
Formation Agreement as follows:

                  "(v) any Claims against, or Loss of, a Venture Entity, US
         EmployCo or their respective Affiliates arising out of or relating to
         any activity outside the Schlumberger Seismic Business prior to
         Closing;"

         (q) The last sentence of Section 12.9 of the Master Formation Agreement
is hereby amended in its entirety as follows:

                  "If there is any conflict between this Agreement and any other
         Transaction Document, the provisions of this Agreement shall govern;
         provided, that if there is any conflict between this Agreement and the
         Closing Agreement or the

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         Nominee Agreement, the provisions of the Closing Agreement or the
         Nominee Agreement, as applicable, shall govern."

         (r) Section 6.10 of the Master Formation Agreement is hereby deleted.

         2. Technical Liaisons. Pursuant to Section 7.19 of the Master Formation
Agreement, the parties hereby agree as follows:

         (a) Schlumberger hereby appoints Philippe Lacour-Gayet and Dominic
Pajot to serve as Technical Liaisons to the Venture Entities.

         (b) Baker Hughes hereby appoints Mike Norris and James Jackson to serve
as Technical Liaisons to the Venture Entities.

         3. Shareholder Representatives Committee. Pursuant to Section 7.21 of
the Master Formation Agreement, the parties hereby agree as follows:

         (a) Schlumberger hereby appoints Andrew Gould and Simon Ayat to serve
as representatives on the Shareholders Representative Committee created by the
Shareholders' Agreement.

         (b) Baker Hughes hereby appoints Andrew J. Szescila and G. Steve Finley
to serve as representatives on the Shareholders Representative Committee created
by the Shareholders' Agreement.

         4. Temporary Import Status. Baker Hughes, on the one hand, and
Schlumberger, SPLC, SLBV, STC and SOHL, jointly and severally, on the other
hand, each agree to indemnify, defend and hold harmless the appropriate Venture
Entities or their respective appropriate subsidiaries from and against and in
respect of any Claim or Loss arising out of:

                  (a) fines, penalties or related costs or expenses levied
         against or incurred by the Venture Entity or appropriate subsidiary
         thereof upon the transfer of Transferred Assets in any way relating to
         the temporary importation status of the Transferred Assets; and

                  (b) customs duties, import or export duties, taxes or related
         costs or expenses (whether deferred or not) levied against or incurred
         by the Venture Entity or appropriate subsidiary thereof upon the export
         from the country where the Transferred Assets were located on the
         Closing Date of temporarily imported Transferred Assets located in that
         country that are not Marine Assets (defined below).

The foregoing indemnity obligation in this Section 4 shall not apply to:

                  (x) the costs and expenses of mobilizing or demobilizing the
         Transferred Assets, including (without limitation) costs and expenses
         of shipping, storing, crating or transporting the Transferred Assets
         for export, which costs and

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         expenses shall be borne by the appropriate Venture Entity or subsidiary
         thereof; and

                  (y) customs duties, import or export duties, taxes or related
         costs or expenses levied against or incurred by the Venture Entity or
         appropriate subsidiary thereof upon the nationalization of temporarily
         imported Transferred Assets.

         The Venture Entities agree to, and agree to cause their respective
subsidiaries to, use their commercially reasonable efforts to cooperate with
Baker Hughes, Schlumberger, SPLC, SLBV, STC, SOHL and their respective
Affiliates to minimize any customs duties, import or export duties, taxes,
fines, penalties or related costs or expenses that are the subject of the
indemnity given in this Section 4. For the purposes of this Section 4, "Marine
Assets" means vessels, barges, boats and other watercraft, and, in each case,
any equipment, consumables, ships stores or other related assets that are
maintained or stored on the watercraft or on land. Baker Hughes' indemnity
obligations pursuant to this Section 4 shall be limited to $3 million with
respect to Transferred Assets in Syria, $7 million with respect to Transferred
Assets in Egypt, and $450,000 with respect to Transferred Assets in Trinidad.

         5. Non-Transferred Assets. The parties agree that the following real
property shall be deemed to be Non-Transferred Assets:

         (a) Schlumberger facilities in Orpington, UK and Calgary, Canada;

         (b) Baker Hughes facilities in Littleton, US and Croydon, UK;

         (c) Interest of Western Atlas International, Inc. in Eastern
Geophysical;

         (d) Lease at Plots 468, 1, 2, 11, 12 Trans Amad; Industria Layout, Port
Harcourt Nigeria; and

         (e) Lease at 17 Mekunwen, Flat 2, Ikoy; Nigeria.

         6. Designated Payees. Pursuant to the provisions of Section 3.10 to the
Master Formation Agreement, Schlumberger hereby designates Schlumberger
Technology Corporation (U.S.) and Schlumberger Oilfield Holdings Limited
(non-U.S.) and Baker Hughes hereby designates Baker Hughes Incorporated (U.S.)
and Baker Hughes GmbH (non-U.S.), in each case, to receive as nominee, to the
extent practicable, all payments due to Schlumberger and Baker Hughes, as
applicable under Section 3.10.

         7. Venture Entity Directors. As required by the Shareholders'
Agreement, Schlumberger and its affiliates may appoint two members of the board
of directors or other governing board of each Venture Entity and US EmployCo and
Baker Hughes and its affiliates may appoint one member to such governing board.
The parties hereby agree that the following individuals will be appointed as the
initial members of those boards:

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                  US Venture Entity
                      Daniel Churay
                      David Meeh
                      Duncan Riley

                  Dutch Venture Entity
                      Gavin Sinclair
                      Dirk Van Hilten
                      Bram Verburg

                  BVI Venture Entity
                      Gavin Sinclair
                      Peter Wilkinson
                      Michael McGuinty

                  UK Venture Entity
                      Gavin Sinclair
                      Michael Golding
                      Julian Ceha

                  US EmployCo
                      Daniel Churay
                      David Meeh
                      Duncan Riley

         8. Nominee Agreement. The parties hereto agree that the Nominee
Agreement supplements and amends Section 7.20 of the Master Formation Agreement
with respect to the Assets (as defined in the Nominee Agreement) in all
respects. The parties hereto agree to cause the Dutch Venture Entity and the BVI
Venture Entity to fulfill their obligations under the Nominee Agreement. If
required by Section 7.20(a)(iv) of the Master Formation Agreement, an entity
designated by Schlumberger (other than the Venture Entities or any of their
respective subsidiaries) shall pay to Baker Hughes' designee an amount equal to
the withholding taxes actually incurred by Baker Hughes or its appropriate
Affiliate in transferring any amount from the Nominee to Baker Hughes' designee
pursuant to Section 3(b)(ii) of the Nominee Agreement.

         9. Amendments to Delft Charter Documents. The parties hereto agree to
cause certain mutually agreeable amendments to the articles of association of
the Dutch Venture Entity to be effected as soon as practicable after the Closing
to conform the articles of association to the terms provided in the Master
Formation Agreement and the Shareholders' Agreement to the extent allowed by
applicable law.

         10. Venture Entity Charter Restrictions. To the extent the charter
documents of the Venture Entities contain restrictions on transfer in addition
to or in contravention of those provided in Article 11 of the Master Formation
Agreement, the parties agree to use good faith efforts to implement to the
greatest extent possible, any proposed transfer in accordance with the
provisions of Article 11.

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         11. Waiver of Late Deliveries.

         The parties hereby waive any late delivery of any documents that were
to be delivered under the Master Formation Agreement prior to the Closing.

         12. Waiver of Conditions.

         The parties hereby agree that all conditions to the Closing are hereby
deemed satisfied or waived.

         13. Exhibits Deemed in Substantially the Same Form. Each of the
following documents executed as of the Closing Date, which were attached as
exhibits to the Master Formation Agreement, is deemed to be in substantially the
same form as was attached as an exhibit to the Master Formation Agreement and
any changes to any such documents as executed are hereby deemed agreed to and
approved by each of the parties hereto.

         (a) Shareholders Agreement;

         (b) Sublease;

         (c) Venture Entity and US EmployCo supplements;

         (d) Shared Services Agreement;

         (e) Transition Services Agreement; and

         (f) limited liability company agreement of US Venture Entity.

         14. Baker Hughes Transferred IP. Notwithstanding the provisions of
Section 9.2 of the Master Formation Agreement, the Baker Hughes Transferred IP
shall be transferred to the Venture as follows:

         (a) All Baker Hughes Transferred IP and Schlumberger Transferred IP
primarily related to the Seismic Business in the U.S. will be transferred to the
US Venture Entity;

         (b) All Baker Hughes Transferred IP and Schlumberger Transferred IP
primarily related to the Seismic Business in Canada will be transferred to
Western GECO Canada, a subsidiary of the Dutch Venture Entity; and

         (c) All Baker Hughes Transferred IP and Schlumberger Transferred IP
primarily related to the Seismic Business anywhere other than the U.S. and
Canada will be transferred to the BVI Venture Entity.

         15. Ownership of Venture Entities. The parties agree that as of
immediately after the Closing, the ownership of Venture Entities and US EmployCo
is as follows:

                  US EmployCo:

                      70% - STC
                      30% - Western Atlas International, Inc.

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                  US Venture Entity:

                      70% - STC
                      30% - Western Atlas International, Inc.

                  UK Venture Entity:

                      70% - SPLC
                      30% - Baker Hughes (UK) Limited

                  Dutch Venture Entity:

                      70% - SLBV
                      30% - Baker Hughes International Branches Incorporated

                  BVI Venture Entity:

                      70% - SOHL
                      30% - Western Sea Holdings Limited

The parties agree to cause the Venture Entities and US EmployCo to amend their
charter documents as necessary to reflect this ownership and to provide to each
owner of these entities evidence of that ownership as soon as practicable after
Closing.

         16. UK Tax Loss Sharing Agreement. The parties agree to, or to cause
their respective affiliates to, negotiate in good faith and execute a mutually
agreeable UK Tax Loss Sharing Agreement within 21 days after Closing.

         17. Syrian Assets. The parties agree that, if, as of the time of the
Second Closing, Baker Hughes is unable to cause the assets located in Syria,
that would otherwise be Baker Hughes Transferred Assets, to be transferred to a
Venture Entity, these assets shall be treated as Non-Transferred Assets for the
purposes of the calculations made as of the Second Closing. If, however, Baker
Hughes transfers, or causes an Affiliate to transfer, those assets to a Venture
Entity thereafter, that Venture Entity shall pay, or cause an Affiliate to pay,
to the transferring entity, an amount equal to the net book value of those
assets.

         18. Effect of Amendments. Other than as amended herein, the Master
Formation Agreement shall continue in full force and effect. Pursuant to Section
12.9 of the Master Formation Agreement, this Agreement forms a part of, and
shall be construed in conjunction with, the Master Formation Agreement.

         19. Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Texas applicable to contracts made and
to be performed therein, without giving effect to the principles of conflict of
laws thereof.

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         20. Counterparts. This Agreement may be executed by the parties hereto
in separate counterparts, each of which when so executed and delivered shall be
an original, but all such counterparts shall together constitute one and the
same instrument. Each counterpart may consist of a number of copies hereof each
signed by less than all, but together signed by all, of the parties hereto.

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         IN WITNESS WHEREOF, each of the undersigned has caused this Agreement
to be duly executed and delivered on its behalf as of the date first set forth
above.

                                     SCHLUMBERGER LIMITED

                                     By: /s/ Robert Villard
                                         -----------------------
                                         Robert Villard
                                         Attorney-in-Fact

                                     SCHLUMBERGER OILFIELD
                                       HOLDINGS LIMITED

                                     By: /s/ Robert Villard
                                         -----------------------
                                         Robert Villard
                                         Attorney-in-Fact

                                     SCHLUMBERGER PLC

                                     By: /s/ Robert Villard
                                         -----------------------
                                         Robert Villard
                                         Attorney-in-Fact

                                     SCHLUMBERGER B.V.

                                     By: /s/ A. R. Verburg
                                         -----------------------
                                         A. R. Verburg
                                         Director

                                     SCHLUMBERGER TECHNOLOGY
                                       CORPORATION

                                     By: /s/ John Yearwood
                                         -----------------------
                                         John Yearwood
                                         Attorney-in-Fact

<PAGE>   12

                                     BAKER HUGHES INCORPORATED

                                     By: /s/ John H. Lohman, Jr.
                                         -----------------------
                                         John H. Lohman, Jr.
                                         Vice Presidentex10-1

EXECUTION COPY

VOTING AND SUPPORT AGREEMENT

      This Voting and Support Agreement dated as of December 13, 2000 between
the stockholders identified on Exhibit A hereto (individually, a “Stockholder”
and collectively, the “Stockholders”) and Network 1 Financial Corporation, a
Virginia corporation (“Network 1”). Capitalized terms used but not defined
herein shall have the meanings ascribed to such terms in the Merger Agreement
(as defined below).

      In consideration of the execution by Network 1 of the Agreement and Plan
of Merger dated as of December 12, 2000 (the “Merger Agreement”) by and among
CyberCash, Inc., a Delaware Corporation (“CyberCash”), Blue Fish Acquisition
Corp., and Network 1 and other good and valuable consideration, receipt of
which is hereby acknowledged, the Stockholders and Network 1 hereby agree as
follows:

      1.      Representations, Warranties and Agreements of Stockholders. Each
Stockholder hereby represents and warrants to, and agrees with, Network 1 as
follows:

               (a)      Title.  As of the date hereof, such Stockholder is the beneficial and
registered owner of or has the power to vote the number of shares
(collectively, the “Shares”) of common stock, $0.001 par value per share
(“Common Stock”) set forth beside such Stockholder’s name on Exhibit A hereto.
As of the date hereof, except as set forth on Exhibit A hereto, such
Stockholder does not (i) beneficially own any shares of any class or series of
capital stock of CyberCash (other than the Shares) or any securities
convertible into or exercisable for shares of any class or series of
CyberCash’s capital stock or (ii) have any options or other rights to acquire
any shares of any class or series of capital stock of CyberCash or any
securities convertible into or exercisable for shares of any class of
CyberCash’s capital stock. Such Stockholder owns his or its Shares free and
clear of any lien, mortgage, pledge, charge, security interest or any other
encumbrance of any kind. Such Stockholder covenants and agrees to take any
action necessary to insure that such Stockholder can carry out the terms of
this Agreement.

               (b)      Right to Vote and to Transfer Shares.  Such Stockholder has full legal
power, authority and right to vote all of the Shares held by such Stockholder
in favor of approval and adoption of the Merger Agreement without the consent
or approval of, or any other action on the part of, any other person or entity,
and except where the failure to obtain such consent or approval could not
prevent or delay the performance by such Stockholder of his or its obligations
under this Agreement in any material respect. Without limiting the generality
of the foregoing, except for this Agreement and as set forth in Schedule 1B
hereto, such Stockholder has not entered into any voting agreement or any other
agreement with any person or entity with respect to any of the Shares, granted
any person or entity any proxy (revocable or irrevocable) or power of attorney
with respect to any of the Shares, deposited any of the Shares in a voting
trust or entered into any arrangement or agreement with any person or entity
limiting or affecting such Stockholder’s ability to enter into this Agreement
or legal power, authority or right to vote the Shares in favor of the approval
and adoption of the Merger Agreement or any of the transactions contemplated by
the Merger Agreement, and such Stockholder will not take any such action after
the date of this Agreement and prior to the CyberCash Special Meeting to vote
on approval and

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EXECUTION COPY

 adoption of the Merger Agreement, including any adjournment or
postponement thereof. This Agreement has been duly executed and delivered by
such Stockholder and, assuming its due execution and delivery by Network 1,
constitutes a valid and binding agreement of such Stockholder.

      2.      Representations and Warranties of Network 1. Network 1 hereby
represents and warrants to the Stockholders that this Agreement (i) has been
duly authorized by all necessary corporate action, (iii) has been duly executed
and delivered by Network 1 and (iii) is a valid and binding agreement of
Network 1.

      3.      Restriction on Transfer. Each Stockholder agrees that (other than
pursuant to the Merger Agreement) such Stockholder will not, and will not agree
to, sell, assign, dispose of, encumber, mortgage, hypothecate or otherwise
transfer or encumber (collectively, “Transfer”) any of the Shares to any person
or entity.

      4.      Agreement to Vote of Stockholders. Each Stockholder, in his or its
individual capacity as a stockholder of CyberCash only, hereby irrevocably and
unconditionally agrees to vote or to cause to be voted all of the Shares
beneficially held by such Stockholder, directly or indirectly, at the CyberCash
Special Meeting and at any other annual or special meeting of stockholders of
CyberCash where such matters arise (a) in favor of the approval and adoption of
the Charter Amendment and the issuance of the Merger Shares, and (b) against
(i) approval of any proposal made in opposition to or in competition with the
Merger or any of the other transactions contemplated by the Merger Agreement,
(ii) any merger, consolidation, sale of assets, business combination, share
exchange, reorganization or recapitalization of CyberCash or any of its
subsidiaries, with or involving any party other than Network 1 or one of its
subsidiaries, (iii) any liquidation, dissolution or winding up of CyberCash,
(iv) any extraordinary dividend by CyberCash, (v) any change in the capital
structure of CyberCash (other than pursuant to the Merger Agreement) and (vi)
any other action that may reasonably be expected to impede, interfere with,
delay, postpone or attempt to discourage the Merger or the other transactions
contemplated by the Merger Agreement or this Agreement or result in a breach of
any of the covenants, representations, warranties or other obligations or
agreements of CyberCash under the Merger Agreement which would materially and
adversely affect CyberCash or its ability to consummate the transactions
contemplated by the Merger Agreement. Each Stockholder further agrees not to
take or commit or agree to take any action inconsistent with the foregoing.

      5.      Action in Stockholder Capacity Only. Each Stockholder signs solely in
such Stockholder’s capacity as a record and beneficial owner of the Shares held
by him or it, and nothing herein shall prohibit, prevent or preclude such
Stockholder from fulfilling his fiduciary duties as a director of CyberCash.

      6.      No Shopping. Each Stockholder, in his or its individual capacity as a
stockholder of CyberCash only, agrees not to, directly or indirectly, (i)
solicit, initiate or encourage (or authorize any person to solicit, initiate or
encourage) any inquiry, proposal or offer from any person relating to an
acquisition proposal or (ii) participate in any discussion or negotiations
regarding, or furnish to any other person any information with respect to, or
otherwise cooperate

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EXECUTION COPY

 in any way with, or participate in, facilitate or encourage any effort or
attempt by any other person to do or seek any of the foregoing that
constitutes, or would reasonably be expected to lead to, an acquisition
proposal; provided, that, notwithstanding the foregoing, a Stockholder shall
not be prohibited from taking any such actions as are required, based upon
advice of counsel, to comply with his fiduciary duties as an officer and/or
director of CyberCash to the extent such actions are permitted under the Merger
Agreement.

      7.      Executed in Counterparts. This Agreement may be executed in
counterparts each of which shall be an original with the same effect as if the
signatures hereto and thereto were upon the same instrument.

      8.      Specific Performance. The parties hereto agree that if for any reason
a Stockholder fails to perform any of his or its agreements or obligations
under this Agreement irreparable harm or injury to Network 1 would be caused
for which money damages would not be an adequate remedy. Accordingly, each
Stockholder agrees that, in seeking to enforce this Agreement against such
Stockholder, Network 1 shall be entitled to specific performance and injunctive
and other equitable relief in addition and without prejudice to any other
rights or remedies, whether at law or in equity, that Network 1 may have
against such Stockholder for any failure to perform any of his or its
agreements or obligations under this Agreement.

      9.      Amendments; Termination.

               (a)      This Agreement may not be modified, amended, altered or supplemented,
except upon the execution and delivery of a written agreement executed by the
parties hereto.

               (b)      The provisions of this Agreement shall terminate upon the earlier to
occur of the Effective Time or the termination of the Merger Agreement pursuant
to Section 6.1 thereof.

               (c)      For purposes of this Agreement, the term “Merger Agreement” includes
the Merger Agreement, as the same may be modified or amended from time to time.

      10.    Additional Shares. If, after the date hereof a Stockholder acquires
beneficial ownership of any shares of the capital stock of CyberCash (any such
shares, “Additional Shares”), including, without limitation, upon exercise of
any option, warrant or right to acquire shares of capital stock or through any
stock dividend or stock split, the provisions of this Agreement (other than
those set forth in Section 1(a)) applicable to the Shares shall be applicable
to such Additional Shares as if such Additional Shares had been Shares as of
the date hereof. The provisions of the immediately preceding sentence shall be
effective with respect to Additional Shares without action by any person or
entity immediately upon the acquisition by such Stockholder of beneficial
ownership of such Additional Shares.

      11.    Action by Written Consent. If, in lieu of the CyberCash Special
Meeting, stockholder action in respect of the Merger Agreement or any of the
transactions contemplated by the Merger Agreement is taken by written consent,
the provisions of this Agreement imposing

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 obligations in respect of or in connection with the CyberCash Special
Meeting shall apply mutatis mutandis to such action by written consent.

      12.    Successors and Assigns. The provisions of this Agreement shall be
binding upon and inure to the benefit of the parties hereto and their
respective legal successors and permitted assigns; provided that no party may
assign, delegate or otherwise transfer any of its rights or obligations under
this Agreement without the consent of Network 1 (in the case of a Stockholder
or any of its permitted assigns) or the Stockholders (in the case of Network 1
or any of its permitted assigns).

      13.    Notices. All notices, requests, claims, demands and other
communications hereunder shall be deemed to have been duly given when delivered
in person, by facsimile, or by registered or certified mail (postage prepaid,
return receipt requested) to such party at its address set forth on the
signature page hereto.

      14.     Severability. If any term or other provision of this Agreement is
determined to be invalid, illegal or incapable of being enforced by any rule or
law or public policy, all other conditions and provisions of this Agreement
shall nevertheless remain in full force and effect so long as the economic or
legal substance of the transactions contemplated hereby is not affected in any
manner materially adverse to any party. Upon such determination that any term
or provision is invalid, illegal or incapable of being enforced, the parties
hereto shall negotiate in good faith to modify this Agreement so as to effect
the original intent of the parties as closely as possible to the fullest extent
permitted by applicable law in an acceptable manner to the end that the
transactions contemplated hereby are fulfilled to the extent possible.

      15.    Entire Agreement. This Agreement constitutes the entire agreement of
the parties and supersedes all prior agreements and undertakings, both written
and oral, between the parties, or any of them, with respect to the subject
matter hereof.

      16.    Governing Law; Jurisdiction and Venue. This Agreement shall be
governed by and construed in accordance with the internal laws (and not the law
of conflicts) of the State of Delaware. The parties hereto hereby irrevocably
and unconditionally consent to submit to the exclusive jurisdiction of the
courts of the State of Delaware and the United States of America located in the
State of Delaware (the “Delaware Courts”) for any litigation arising out of or
relating to this Agreement and the transactions contemplated hereby (and agree
not to commence any litigation relating thereto except in such courts), consent
to the service of process in such Delaware Courts, waive any objection to the
laying of venue of any such litigation in the Delaware Courts and agree not to
plead or claim in any Delaware Court that such litigation brought therein has
been brought in any inconvenient forum

      17.    Exculpation. No Stockholder shall have any liability or obligation
whatsoever under or by reason of this Agreement (or a separate similar
agreement) because of a breach by any other stockholder of CyberCash of its
obligations hereunder or thereunder.

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* * *

{Signatures on following page}

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EXECUTION COPY

      IN WITNESS WHEREOF, the parties hereto have caused this Voting and Support
Agreement to be duly executed as of the date first above written.

	 
	NETWORK 1 FINANCIAL CORPORATION
	 
	By: /s/ William G. Wade

Name: William G. Wade

Title: President and Chief Executive Officer
	 
	WILLIAM N. MELTON
	 
	By: /s/ William N.
Melton

William N. Melton
	 
	THE MELTON FOUNDATION
	 
	By: /s/ William N.
Melton

William N. Melton

Title: Trustee
	 
	THE WILLIAM N. MELTON 1994 CHARITABLE

REMAINDER ANNUITY TRUST
	 
	By: /s/ Torunn Meighan

Name: Torunn Meighan

Title:  Trustee
	 
	THE WILLIAM N. MELTON 1995 CHARITABLE

REMAINDER ANNUITY TRUST
	 
	By: /s/ Torunn Meighan

Name: Torunn Meighan

Title: Trustee

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EXHIBIT A

	 	 	 
	Name and Address		
Number of Shares of CyberCash Common
Stock
	
		

	 	 	 
	William N. Melton

For himself and as Trustee of The Melton

Foundation

Torunn Meighan

As Trustee for The William N. Melton 1994 and

1995 Charitable Remainder Annuity Trusts

C/o Melton Investments

2086 Hunters Crest Way

Vienna, VA 22181		
4,815,498 Common Stock

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