Document:

10.2 Purchase Agreement between EMB and e-Net Financial Corporation dated
     December 22, 1999 for VPN.

                        JOINT VENTURE PURCHASE AGREEMENT

     THIS PURCHASE AGREEMENT (the "Agreement") is made and entered into by and
between E-NET FINANCIAL CORPORATION, hereinafter referred to as "Purchaser" or
"E-NET"; and EMB, CORPORATION, hereinafter referred to as EMB or "Seller".

                                    PREAMBLE

     WHEREAS, the Seller, a corporation organized under the laws of the State of
Hawaii, holds a Fifty Percent (50%) Interest in VPN.COM JV PARTNERS (VPN); and

     WHEREAS, the Purchaser desires to acquire said interest in Joint Venture;

and

WHEREAS, Seller is agreeable to the foregoing:

     NOW THEREFORE, in consideration of the mutual promises and covenants
contained herein the parties hereto agree and contract as follows:

                                   ARTICLE ONE
                               PURCHASE PROVISIONS

1.1  Purchase and Sale

     The Seller hereby agrees to sell to the Purchaser and Purchaser hereby
     agrees to purchase from Seller the aforementioned Interest in VPN, in and
     for the total sum of Five Hundred Thousand (500,000) Shares of EMB
     Corporation Common Stock as set forth in APPENDIX I.

1.2  This agreement shall survive any reorganization, merger, or change of
     control of EMB, Corporation occurring during the term hereof.

                                   ARTICLE TWO
                         REPRESENTATIONS AND WARRANTIES

2.1  SELLER

     Seller does hereby represent and warrant to the Purchaser, as a material
          inducement to its entry into this Agreement, that prior to the close
          of this Agreement, that:

     (a)  The conduct of the Corporation's business is in full compliance with
          all applicable Federal, state and local governmental statutes, rules,
          regulations, ordinances and decrees;

     (b)  Upon execution of this agreement, Purchaser will become the owner of
          record of the Corporation's interest in VPN.COM JV PARTNERS

     (c)  The Corporation is not a party to any agreement or understanding for
          the sale or exchange of inventory or services for consideration other
          than cash or at a discount in excess of normal discount for quantity
          or cash payment;

     (d)  The Corporation has filed with the appropriate governmental agencies
          all tax returns and tax reports required to be filed; all Federal,
          state and local income, franchise, sales, use, occupation or other
          taxes due have been fully paid.

     (e)  The execution, delivery and performance of this Agreement and the
          transactions contemplated hereby do not require the consent, authority
          or approval of any other person or entity except such as has been
          obtained;

     (f)  Annexed hereto and made a part hereof as part of APPENDIX I are true,
          correct and current copies of the Corporation's Articles of
          Incorporation.

<PAGE>

10.2 Purchase Agreement between EMB and e-Net Financial Corporation dated
     December 22, 1999 for VPN.

                                  ARTICLE THREE
                                  MISCELLANEOUS
                               GENERAL PROVISIONS

1.   ENTIRETY

     This Agreement together with the instruments referred to herein, contains
     all of the understandings and agreements of the Parties with respect to the
     subject matter discussed herein. All prior agreements whether written or
     oral are merged herein and shall be of no force or effect.

2.   SURVIVAL

     The several representations, warranties and covenants herein shall survive
     the execution hereof and shall be effective regardless of any investigation
     that may have been made or may be made by or on behalf of any party. The
     Seller hereby covenants that he has not failed to disclose any material
     fact or circumstance to Purchaser, which if known to the Purchaser prior to
     or during this transaction would alter the Purchaser's decision as to if or
     in what manner the Purchaser would acquire the subject shares from Seller.

3.   SEVERABILITY

     If any provision of this Agreement or any application of such provision to
     any person or circumstance shall be held invalid or unenforceable, the
     remaining portions of such provision and the remaining provisions of this
     Agreement shall not be affected thereby.

4.   GOVERNING LAW

     This Agreement be construed in accordance with the laws of the State of
     Nevada.

5.   LITIGATION

     In the event disputes arise from a difference of interpretation of or the
     failure of either party to perform the terms of this Agreement, such
     disputes shall not be litigated but submitted to binding arbitration for
     final settlement. For the purposes of this Agreement, any damages, and
     costs arising from such disputes awarded to the prevailing party shall not
     exceed the sum of $100,000.00 plus interest at 10% APR, attorney, and
     arbitration costs in the aggregate; with such sum being deemed liquidated
     damages hereunder.

6.   BENEFIT OF AGREEMENT

     The terms and provisions of this Agreement shall be binding upon and inure
     to the benefit of the parties their successors, estate, heirs and legatees.
     Notwithstanding anything contained herein elsewhere, no portion of this
     agreement or any rights granted thereunder may be assigned, transferred, or
     hypothecated by Purchaser without the prior written consent of Seller.

7.   FURTHER ASSURANCES

     The parties agree to do, execute, acknowledge and deliver or cause to be
     done, executed, acknowledged or delivered and to perform all such acts and
     deliver all such deeds, assignments, transfer, conveyances, powers of
     attorney, assurances, stock certificates and other documents, as may, from
     time to time, be required herein to effect the intent and purposes of this
     agreement.

<PAGE>

10.2 Purchase Agreement between EMB and e-Net Financial Corporation dated
     December 22, 1999 for VPN.

8.   STATUS

     Nothing in this Agreement shall be construed or shall constitute a
     partnership, joint venture, employer-employee relationship, lessor-lessee
     relationship or principal agent relationship; but, rather, the relationship
     established pursuant hereto shall be that of Purchaser and Seller.

9.   TERMINATION

     In the event that both parties fail to complete the terms and conditions of
     this Agreement, as contemplated in Article One hereof, then this Agreement
     shall be deemed terminated and void as between the Parties, with no party
     having any rights or liabilities against the other. The term of this
     agreement shall not exceed five years from date of the execution hereof.

10.  AMENDMENT

     No modification, waiver, amendment, discharge or change of this Agreement
     shall be valid unless the same is evidenced by a written instrument,
     subscribed by both parties to this Agreement.

11.  NOTICES

     All notices, demands or other communications given hereunder shall be in
     writing and shall be deemed to have been duly given on the first business
     day after mailing by United States registered or certified mail, return
     receipt requested, postage prepaid, addressed as follows:

     TO PURCHASER;

     2102 Business Center Drive, #115E
     Irvine Ca 92612

     TO EMB, Corporation:

     3200 S. Bristol St. 8th Floor
     Costa Mesa Ca 92626

IN WITNESS WHEREOF, the parties hereto execute this agreement on the date stated
below.

SELLER:
EMB Corporation

BY:__________________________                 Date:_________________

PURCHASER:
e-Net Financial Corporation

BY_____________________                        Date:________________

include: APPENDICES I

<PAGE>

10.2 Purchase Agreement between EMB and e-Net Financial Corporation dated
     December 22, 1999 for VPN.

                                   APPENDIX I

                  DESCRIPTION OF CONSIDERATION FOR THE PURCHASE
              OF EMB CORPORATION'S INTEREST IN VPN.COM JV PARTNERS

Terms and conditions of payment:

     3.   E-Net Financial Corporation to transfer ownership in 500,000 shares of
          EMB Common Stock upon execution of this Agreement.Exhibit A

                               ADVISORY AGREEMENT

THIS  ADVISORY  AGREEMENT  ( the  "Agreement")  is made this 8th day of December
1999, by and between Ronald W. Welborn,  a Texas resident  ("Advisor") and Power
Exploration,  Inc., a Nevada Corporation with its offices located in Fort Worth,
Texas (the "Company").

         WHEREAS,  Advisor and  Advisors's  Personnel  (as  defined  below) have
experience  in  evaluating  and  effecting  mergers and  acquisitions,  advising
corporate  management,  and in  performing  general  administrative  duties  for
publicly-held companies and development stage investment ventures; and

         WHEREAS, the Company desires to retain Advisor to advise and assist the
Company in its development on the terms and conditions set forth below.

         NOW, THEREFORE, in consideration of the mutual promises,  covenants and
agreements contained herein, and for other good and valuable consideration,  the
receipt and sufficiency of which is hereby acknowledged, the Company and Advisor
agree as follows:

1.       Engagement

         The Company hereby retains  Advisor,  effective as of the date hereof (
         the "Effective  Date") and continuing  until  termination,  as provided
         herein,  to assist  the  Company  in it's  effecting  the  purchase  of
         businesses  and assets  relative to its business  and growth  strategy,
         general business and financial issues  consulting,  the introduction of
         the  Company  to  brokers  and  dealers,  public  relations  firms  and
         consultants  and others  that may  assist the  Company in its plans and
         future and to assist in the  acquisition  of wells and other  producing
         properties (the "Services"). The Services are to be provided on a "best
         efforts"  basis  directly  and  through  Advisor's  officers  or others
         employed or retained  and under the  direction  of Advisor  ("Advisor's
         Personnel");  provided,  however,  that the  Services  shall  expressly
         exclude all legal advice,  accounting  services or other services which
         require licenses or certification which Advisor may not have.

2.       Term

         This  Agreement  shall have an initial  term of twelve (12) months (the
         "Primary Term"),  commencing with the Effective Date. At the conclusion
         of the Primary Term this  Agreement will  automatically  be extended on
         for the same  term ( the  "Extension  Period")  unless  Advisor  or the
         Company shall serve written notice on the other party  terminating  the
         Agreement.  Any notice to terminate given hereunder shall be in writing
         and shall be  delivered  at least  thirty (30) days prior to the end of
         the Primary Term or any subsequent Extension Period.

3.       Time and Effort of Advisor

         Advisor  shall  allocate  time  and  Advisors  Personnel  as  it  deems
         necessary to provide the Services.  The  particular  amount of time may
         vary  from  day to day or week to week.  Except  as  otherwise  agreed,
         Advisor's monthly statement  identifying,  in general,  tasks performed
         for the Company  shall be  conclusive  evidence  that the Services have
         been performed. Additionally, in the absence of willful

                                       6

<PAGE>

         misfeasance,  bad  faith,  negligence  or  reckless  disregard  for the
         obligations  or  duties  hereunder  by  Advisor,  neither  Advisor  nor
         Advisor's  Personnel  shall  be  liable  to the  Company  or any of its
         shareholders for any act or omission in the course of or connected with
         rendering the Services, including but not limited to losses that may be
         sustained in any corporate act in any subsequent  Business  Opportunity
         (as  defined  herein)  undertaken  by the Company as a result of advice
         provided by Advisor or Advisors's Personnel.

4.       Compensation

         The  Company  agrees to pay Advisor a fee for the  Services  ("Advisory
         Fee") by way of the  issuance  by the  company of Seven  Hundred  Fifty
         Thousand  (750,000)  shares of the Company's common stock as an initial
         fee following the closing of the acquisition of interests from Rife Oil
         Properties,  Inc., as follows:  Four Hundred Thousand  (400,000) of the
         shares shall be issued after  January 1, 2000,  and within  ninety (90)
         days after the closing thereof,  and the balance of the shares shall be
         issued 150 days following the closing of the Rife Oil Properties,  Inc.
         Acquisition.  As incentive to execute this agreement,  the Company does
         hereby grant to Advisor the right to purchase up to Seven Hundred Fifty
         Thousand  (750,000)  shares at an option  price of $0.66667  per share,
         such option being valid beginning 150 days following the closing of the
         Rife Oil Company  Acquisition  and shall  continue  thereafter  for the
         primary term of this agreement.

5.       Other Services

         If, the Company enters into a merger or exchanges  securities  with, or
         purchases  the assets or enters into a joint  venture with, or makes an
         investment   in  a  company   introduced   by  Advisor  (  a  "Business
         Opportunity"),  the  Company  agrees to pay  Advisor a fee equal to ten
         percent (10%) of the value of each Business  Opportunity  introduced by
         Advisor  and  acquired  or  otherwise  participated  in by the  Company
         (collectively referred to herein, in each instance, as the "Transaction
         Fee"), which shall be payable immediately following the closing of each
         such transaction, in restricted shares of the Company's common stock or
         in kind if an acquisition is made at the Company's  option,  if paid in
         cash the Transaction Fee shall be reduced to five percent (5%).

6.       Registration of Shares

         Company agrees that any shares issued to satisfy a Transaction  Fee may
         be  registered  by  the  Company  with  the   Securities  and  Exchange
         Commission under any subsequent applicable registration statement filed
         by  the  Company  at  the  Company's   discretion.   Such  issuance  or
         reservation  of shares  shall be in  reliance  on  representations  and
         warranties of Advisor set forth herein.

7.       Costs and Expenses

         All third party and  out-of-pocket  expenses incurred by Advisor in the
         performance  of the  Services or for the  settlement  of debts shall be
         paid by the Company,  or Advisor shall be reimbursed if paid by Advisor
         on behalf of the  Company,  within  ten (10) days of receipt of written
         notice by Consultant, provided that the Company must approve in advance
         all such expenses in excess of $500 per month.

8.       Place of Services

         The Services provided by Advisor or Advisor's  Personnel hereunder will
         be performed at Advisor's  offices except as otherwise  mutually agreed
         by Advisor and the Company.

                                       7

<PAGE>

9.       Independent Contractor

         Advisor and Advisor's  Personnel will act as an independent  contractor
         in the  performance  of its duties under this  Agreement.  Accordingly,
         Advisor  will be  responsible  for payment of all federal,  state,  and
         local taxes on compensation paid under this Agreement, including income
         and social security taxes,  unemployment insurance, and any other taxes
         due relative to Advisor's  Personnel,  and any and all business license
         fees as may be required. This Agreement neither expressly nor impliedly
         creates  a  relationship  of  principal  and  agent,  or  employee  and
         employer,  between Advisor's Personnel and the Company. Neither Advisor
         nor Advisor's  Personnel are authorized to enter into any agreements on
         behalf of the  Company.  The  Company  expressly  retains  the right to
         approve,  in its sole  discretion,  each Asset  Opportunity or Business
         Opportunity introduced by Advisor, and to make all final decisions with
         respect to effecting a transaction on any Business Opportunity.

10.      Rejected Asset Opportunity or Business Opportunity

         If, during the Primary Term of this Agreement or any Extension  Period,
         the Company elects not to proceed to acquire,  participate or invest in
         any  Business  Opportunity   identified  and/or  selected  by  Advisor,
         notwithstanding  the time and expense  the  Company  may have  incurred
         reviewing such transaction, such Business Opportunity shall revert back
         to and become proprietary to Advisor,  and Advisor shall be entitled to
         acquire  or broker the sale or  investment  in such  rejected  Business
         Opportunity  for its own  account,  or submit  such  assets or Business
         Opportunity elsewhere.  In such event, Advisor shall be entitled to any
         and all profits or fees resulting from Advisor's purchase,  referral or
         placement of any such rejected Business  Opportunity,  or the Company's
         subsequent  purchase or financing  with such  Business  Opportunity  in
         circumvention of Advisor

11.      No Agency Express or Implied

         This Agreement  neither  expressly nor impliedly creates a relationship
         of principal and agent between the Company and Advisor, or employee and
         employer as between Advisor's Personnel and the Company.

12.      Termination

         The  Company  and Advisor may  terminate  this  Agreement  prior to the
         expiration  of the Primary  Term upon thirty (30) days  written  notice
         with mutual written  consent.  Failing to have mutual consent,  without
         prejudice  to any other  remedy to which the  terminating  party may be
         entitled, if any, either party may terminate this Agreement with thirty
         (30) days written notice under the following conditions:

     (A) By the Company.

          (i) If during the  Primary  Term of this  Agreement  or any  Extension
          Period,  Advisor is unable to provide the Services as set forth herein
          for  thirty  (30)  consecutive   business  days  because  of  illness,
          accident, or other incapacity of Advisor's Personnel; or,

          (ii) If Advisor willfully  breaches or neglects the duties required to
          be performed hereunder; or,

          (iii) At Company's option without cause upon 30 days written notice to
          Advisor; or

     (B) By Advisor.

          (i) If the  Company  breaches  this  Agreement  or  fails  to make any
          payments or provide information required hereunder; or,

                                       8

<PAGE>

          (ii) If the  Company  ceases  business  or,  other  than in an Initial
          Merger,  sells a controlling interest to a third party, or agrees to a
          consolidation or merger of itself with or into another corporation, or
          enters into such a transaction outside of the scope of this Agreement,
          or sells  substantially  all of its  assets  to  another  corporation,
          entity  or  individual  outside  of the scope of this  Agreement;  or,

          (iii)If the Company  subsequent to the execution hereof has a receiver
          appointed for its business or assets,  or otherwise  becomes insolvent
          or unable to timely satisfy its obligations in the ordinary course of,
          including  but not limited to the  obligation  to pay the Initial Fee,
          the Transaction Fee, or the Advisory Fee; or,

          (iv) If the Company  subsequent  to the execution  hereof  institutes,
          makes  a  general  assignment  for  the  benefit  of  creditors,   has
          instituted against it any bankruptcy proceeding for reorganization for
          rearrangement of its financial affairs, files a petition in a court of
          bankruptcy, or is adjudicated a bankrupt; or,

          (v) If any of the disclosures made herein or subsequent  hereto by the
          Company  to  Consultant  are  determined  to be  materially  false  or
          misleading.

         In the  event  Advisor  elects  to  terminate  without  cause  or  this
         Agreement is terminated  prior to the expiration of the Primary Term or
         any Extension Period by mutual written agreement, or by the Company for
         the reasons set forth in A(i) and (ii) above, the Company shall only be
         responsible to pay Advisor for unreimbursed expenses,  Advisory Fee and
         Transaction  Fee  accrued up to and  including  the  effective  date of
         termination.  If this  Agreement is  terminated  by the Company for any
         other  reason,  or by Advisor for reasons set forth in B(i) through (v)
         above,  Advisor shall be entitled to any outstanding  unpaid portion of
         reimbursable  expenses,  Transaction Fee, if any, and for the remainder
         of the  unexpired  portion  of the  applicable  term  (Primary  Term or
         Extension Period) of the Agreement.

13.      Indemnification

         Subject to the  provisions  herein,  the Company  and Advisor  agree to
         indemnify,  defend and hold each other  harmless  from and  against all
         demands,  claims,  actions,  losses,  damages,  liabilities,  costs and
         expenses,   including  without  limitation,   interest,  penalties  and
         attorneys' fees and expenses asserted against or imposed or incurred by
         either party by reason of or  resulting  from any action or a breach of
         any representation,  warranty, covenant, condition, or agreement of the
         other party to this Agreement.

14.      Remedies

         Advisor  and the Company  acknowledge  that in the event of a breach of
         this  Agreement by either party,  money damages would be inadequate and
         the  non-breaching   party  would  have  no  adequate  remedy  at  law.
         Accordingly,  in the event of any controversy  concerning the rights or
         obligations  under this Agreement,  such rights or obligations shall be
         enforceable  in a court of equity by a decree of specific  performance.
         Such remedy, however, shall be cumulative and nonexclusive and shall be
         in addition to any other remedy to which the parties may be entitled.

15.      Miscellaneous

         (A)      Subsequent  Events.  Advisor  and the  Company  each  agree to
                  notify  the  other  party if,  subsequent  to the date of this
                  Agreement,   either  party  incurs   obligations  which  could
                  compromise its efforts and obligations under this Agreement.

                                       9

<PAGE>

         (B)      Amendment.  This  Agreement  may be amended or modified at any
                  time  and in any  manner  only  by an  instrument  in  writing
                  executed by the parties hereto.

         (C)      Further Actions and  Assurances.  At any time and from time to
                  time,  each party  agrees,  at its or their  expense,  to take
                  actions  and  to  execute  and  deliver  documents  as  may be
                  reasonably  necessary  to  effectuate  the  purposes  of  this
                  Agreement.

         (D)      Waiver.  Any failure of any party to this  Agreement to comply
                  with  any  of  its  obligations,   agreements,  or  conditions
                  hereunder  may be waived in  writing by the party to whom such
                  compliance is owed. The failure of any party to this Agreement
                  to enforce at any time any of the provisions of this Agreement
                  shall  in no way  be  construed  to be a  waiver  of any  such
                  provision or a waiver of the right of such party thereafter to
                  enforce each and every such provision. No waiver of any breach
                  of or noncompliance  with this Agreement shall be held to be a
                  waiver of any other or subsequent breach or noncompliance.

         (E)      Assignment. Neither this Agreement nor any right created by it
                  shall be  assignable by either party without the prior written
                  consent of the other or as stated herein.

         (F)      Notices.  Any  notice  or  other  communication   required  or
                  permitted  by this  Agreement  must be in writing and shall be
                  deemed to be  properly  given when  delivered  in person to an
                  officer  of the other  party,  when  deposited  in the  United
                  States mails for transmittal by certified or registered  mail,
                  postage  prepaid,  or when deposited  with a public  telegraph
                  company   for   transmittal,   or  when   sent  by   facsimile
                  transmission charges prepared, provided that the communication
                  is addressed:

       In the case of the Company:   Power Exploration, Inc.
                                     5416 Birchman Ave.
                                     Fort Worth, TX 76107
                                     Telephone: (817) 377-4464
                                     Telefax: (817) 377-4686
                                     Attn: Joe Bennett

      In the case of Advisor:        Ronald W. Welborn
                                     11701 South Freeway
                                     Burleson, Texas 76028

     or to such other person or address  designated in writing by the Company or
Advisor to receive notice.

         (G)      Headings.   The  section  and  subsection   headings  in  this
                  Agreement  are  inserted  for  convenience  only and shall not
                  affect  in any  way  the  meaning  or  interpretation  of this
                  Agreement.

         (H)      Governing  Law.  This  Agreement was  negotiated  and is being
                  contracted  for in Utah,  and shall be governed by the laws of
                  the State of Utah,  and the United States of America,  notwith
                  standing any conflict-of-law provision to the contrary.

         (I)      Binding  Effect.  This  Agreement  shall be  binding  upon the
                  parties hereto and inure to the benefit of the parties,  their
                  respective heirs, administrators,  executors,  successors, and
                  assigns.

         (J)      Entire Agreement. This Agreement contains the entire agreement
                  between the parties  hereto  and  supersedes any and all prior
                  agreements,   arrangements,  or   understandings  between  the

                                       10

<PAGE>

                  parties  relating to the subject matter of this Agreement.  No
                  oral  understandings,  statements,  promises,  or  inducements
                  contrary   to  the   terms  of  this   Agreement   exist.   No
                  representations, warranties, covenants, or conditions, express
                  or implied,  other than as set forth herein, have been made by
                  any party.

         (K)      Severability.  If any part of this  Agreement  is deemed to be
                  unenforceable  the balance of the  Agreement  shall  remain in
                  full force and effect.

         (L)      Counterparts.  A facsimile, telecopy, or other reproduction of
                  this  Agreement  may be executed simultaneously in two or more
                  counterparts,  each of  which shall be deemed an original, but
                  all  of  which  together  shall  constitute  one and  the same
                  instrument,  by  one or  more parties hereto and such executed
                  copy  may be delivered  by facsimile or similar  instantaneous
                  electronic   transmission   device   pursuant  to   which  the
                  signature  of or on behalf of such party can be seen. In  this
                  event,  such   execution  and  delivery  shall  be  considered
                  valid,  binding  and   effective  for  all  purposes.  At  the
                  request of  any party hereto, all parties  agree to execute an
                  original   of  this  Agreement  as  well  as  any   facsimile,
                  telecopy or other reproduction hereof.

         (M)      Time  is of the  Essence.  Time  is of  the  essence  of  this
                  Agreement and of each and every provision hereof.

         IN WITNESS  WHEREOF,  the parties have executed  this  Agreement on the
date above written.

      The "Company"                                 "Advisor"
      Power Exploration, Inc.                       Ronald W. Welborn
      A Nevada Corporation                          A Texas Resident

      By: /s/ Joe Bill Bennett                      By: /s/Ronald W. Welborn
          --------------------                         --------------------
      Name: Joe Bill Bennett                        Name: Ronald W. Welborn
            ----------------
      Title: Vice President, COO

                                       11

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