Exhibit 10.9

                               SUBSIDIARY GUARANTY

New York, New York                                                  May 27, 2004

      FOR VALUE RECEIVED, and in consideration of note purchases from, loans
made or to be made or credit otherwise extended or to be extended by Laurus
Master Fund, Ltd. ("Laurus") to or for the account of GVI Security Solutions,
Inc., a Delaware corporation ("Debtor"), from time to time and at any time and
for other good and valuable consideration and to induce Laurus, in its
discretion, to purchase such notes, make such loans or extensions of credit and
to make or grant such renewals, extensions, releases of collateral or
relinquishments of legal rights as Laurus may deem advisable, each of the
undersigned (and each of them if more than one, the liability under this
Guaranty being joint and several) (jointly and severally referred to as
"Guarantors" or "the undersigned") unconditionally guaranties to Laurus, its
successors, endorsees and assigns the prompt payment when due (whether by
acceleration or otherwise) of all present and future obligations and liabilities
of any and all kinds of Debtor to Laurus and of all instruments of any nature
evidencing or relating to any such obligations and liabilities upon which Debtor
or one or more parties and Debtor is or may become liable to Laurus, whether
incurred by Debtor as maker, endorser, drawer, acceptor, guarantors,
accommodation party or otherwise, and whether due or to become due, secured or
unsecured, absolute or contingent, joint or several, and however or whenever
acquired by Laurus, whether arising under, out of, or in connection with (i)
that certain Securities Purchase Agreement dated as of the date hereof by and
between the Debtor and Laurus (the "Securities Purchase Agreement") and (ii)
each Related Agreement referred to in the Securities Purchase Agreement (iii)
that certain Security Agreement dated as of the date hereof by and between the
Debtor and Laurus (the "Security Agreement") and (iv) each Ancillary Agreement
referred to in the Security Agreement (collectively, as each may be amended,
modified, restated or supplemented from time to time, the "Documents"), or any
documents, instruments or agreements relating to or executed in connection with
the Documents or any documents, instruments or agreements referred to therein or
otherwise, or any other indebtedness, obligations or liabilities of the Debtor
to Laurus, whether now existing or hereafter arising, direct or indirect,
liquidated or unliquidated, absolute or contingent, due or not due and whether
under, pursuant to or evidenced by a note, agreement, guaranty, instrument or
otherwise (all of which are herein collectively referred to as the
"Obligations"), and irrespective of the genuineness, validity, regularity or
enforceability of such Obligations, or of any instrument evidencing any of the
Obligations or of any collateral therefor or of the existence or extent of such
collateral, and irrespective of the allowability, allowance or disallowance of
any or all of the Obligations in any case commenced by or against Debtor under
Title 11, United States Code, including, without limitation, obligations or
indebtedness of Debtor for post-petition interest, fees, costs and charges that
would have accrued or been added to the Obligations but for the commencement of
such case. Terms not otherwise defined herein shall have the meaning assigned
such terms in the Securities Purchase Agreement and/or the Security Agreement,
as applicable. In furtherance of the foregoing, the undersigned hereby agrees as
follows:


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      1. No Impairment. Laurus may at any time and from time to time, either
before or after the maturity thereof, without notice to or further consent of
the undersigned, extend the time of payment of, exchange or surrender any
collateral for, renew or extend any of the Obligations or increase or decrease
the interest rate thereon, or any other agreement with Debtor or with any other
party to or person liable on any of the Obligations, or interested therein, for
the extension, renewal, payment, compromise, discharge or release thereof, in
whole or in part, or for any modification of the terms thereof or of any
agreement between Laurus and Debtor or any such other party or person, or make
any election of rights Laurus may deem desirable under the United States
Bankruptcy Code, as amended, or any other federal or state bankruptcy,
reorganization, moratorium or insolvency law relating to or affecting the
enforcement of creditors' rights generally (any of the foregoing, an "Insolvency
Law") without in any way impairing or affecting this Guaranty. This instrument
shall be effective regardless of the subsequent incorporation, merger or
consolidation of Debtor, or any change in the composition, nature, personnel or
location of Debtor and shall extend to any successor entity to Debtor, including
a debtor in possession or the like under any Insolvency Law.

      2. Guaranty Absolute. Subject to Section 5(c), each of the undersigned
jointly and severally guarantees that the Obligations will be paid strictly in
accordance with the terms of the Documents and/or any other document, instrument
or agreement creating or evidencing the Obligations, regardless of any law,
regulation or order now or hereafter in effect in any jurisdiction affecting any
of such terms or the rights of Debtor with respect thereto. Guarantors hereby
knowingly accept the full range of risk encompassed within a contract of
"continuing guaranty" which risk includes the possibility that Debtor will
contract additional indebtedness for which Guarantors may be liable hereunder
after Debtor's financial condition or ability to pay its lawful debts when they
fall due has deteriorated, whether or not Debtor has properly authorized
incurring such additional indebtedness. The undersigned acknowledge that (i) no
oral representations, including any representations to extend credit or provide
other financial accommodations to Debtor, have been made by Laurus to induce the
undersigned to enter into this Guaranty and (ii) any extension of credit to the
Debtor shall be governed solely by the provisions of the Documents. The
liability of each of the undersigned under this Guaranty shall be absolute and
unconditional, in accordance with its terms, and shall remain in full force and
effect without regard to, and shall not be released, suspended, discharged,
terminated or otherwise affected by, any circumstance or occurrence whatsoever,
including, without limitation: (a) any waiver, indulgence, renewal, extension,
amendment or modification of or addition, consent or supplement to or deletion
from or any other action or inaction under or in respect of the Documents or any
other instruments or agreements relating to the Obligations or any assignment or
transfer of any thereof, (b) any lack of validity or enforceability of any
Document or other documents, instruments or agreements relating to the
Obligations or any assignment or transfer of any thereof, (c) any furnishing of
any additional security to Laurus or its assignees or any acceptance thereof or
any release of any security by Laurus or its assignees, (d) any limitation on
any party's liability or obligation under the Documents or any other documents,
instruments or agreements relating to the Obligations or any assignment or
transfer of any thereof or any invalidity or unenforceability, in whole or in
part, of any such document, instrument or agreement or any term thereof, (e) any
bankruptcy, insolvency, reorganization, composition, adjustment, dissolution,
liquidation or other like proceeding relating to Debtor, or any action taken
with respect to this Guaranty by any trustee or receiver, or by any court, in
any such proceeding, whether or not the undersigned shall have notice or
knowledge of any of the foregoing, (f) any exchange, release or nonperfection of
any collateral, or any release, or amendment or waiver of or consent to
departure from any guaranty or security, for all or any of the Obligations or
(g) any other circumstance which might otherwise constitute a defense available
to, or a discharge of, the undersigned. Any amounts due from the undersigned to
Laurus shall bear interest until such amounts are paid in full at the highest
rate then applicable to the Obligations. Obligations include post-petition
interest whether or not allowed or allowable.


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3.       Waivers.

      (a) This Guaranty is a guaranty of payment and not of collection.
Laurus shall be under no obligation to institute suit, exercise rights or
remedies or take any other action against Debtor or any other person liable with
respect to any of the Obligations or resort to any collateral security held by
it to secure any of the Obligations as a condition precedent to the undersigned
being obligated to perform as agreed herein and each of the Guarantors hereby
waives any and all rights which it may have by statute or otherwise which would
require Laurus to do any of the foregoing. Each of the Guarantors further
consents and agrees that Laurus shall be under no obligation to marshal any
assets in favor of Guarantors, or against or in payment of any or all of the
Obligations. The undersigned hereby waives all suretyship defenses and any
rights to interpose any defense, counterclaim or offset of any nature and
description which the undersigned may have or which may exist between and among
Laurus, Debtor and/or the undersigned with respect to the undersigned's
obligations under this Guaranty, or which Debtor may assert on the underlying
debt, including but not limited to failure of consideration, breach of warranty,
fraud, payment (other than cash payment in full of the Obligations), statute of
frauds, bankruptcy, infancy, statute of limitations, accord and satisfaction,
and usury.

      (b) Each of the undersigned further waives (i) notice of the acceptance of
this Guaranty, of the making of any such loans or extensions of credit, and of
all notices and demands of any kind to which the undersigned may be entitled,
including, without limitation, notice of adverse change in Debtor's financial
condition or of any other fact which might materially increase the risk of the
undersigned and (ii) presentment to or demand of payment from anyone whomsoever
liable upon any of the Obligations, protest, notices of presentment, non-payment
or protest and notice of any sale of collateral security or any default of any
sort.

      (c) Notwithstanding any payment or payments made by the undersigned
hereunder, or any setoff or application of funds of the undersigned by Laurus,
the undersigned shall not be entitled to be subrogated to any of the rights of
Laurus against Debtor or against any collateral or guarantee or right of offset
held by Laurus for the payment of the Obligations, nor shall the undersigned
seek or be entitled to seek any contribution or reimbursement from Debtor in
respect of payments made by the undersigned hereunder, until all amounts owing
to Laurus by Debtor on account of the Obligations are paid in full and Laurus'
obligation to extend credit pursuant to the Documents have been terminated. If,
notwithstanding the foregoing, any amount shall be paid to the undersigned on
account of such subrogation rights at any time when all of the Obligations shall
not have been paid in full and Laurus' obligation to extend credit pursuant to
the Documents shall not have been terminated, such amount shall be held by the
undersigned in trust for Laurus, segregated from other funds of the undersigned,
and shall forthwith upon, and in any event within two (2) business days of,
receipt by the undersigned, be turned over to Laurus in the exact form received
by the undersigned (duly endorsed by the undersigned to Laurus, if required), to
be applied against the Obligations, whether matured or unmatured, in such order
as Laurus may determine, subject to the provisions of the Documents. Any and all
present and future debts and obligations of Debtor to any of the undersigned are
hereby waived and postponed in favor of, and subordinated to the full payment
and performance of, all present and future debts and Obligations of Debtor to
Laurus.

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<PAGE>

      4. Security. All sums at any time to the credit of the undersigned and any
property of the undersigned in Laurus' possession or in the possession of any
bank, financial institution or other entity that directly or indirectly, through
one or more intermediaries, controls or is controlled by, or is under common
control with, Laurus (each such entity, an "Affiliate") shall be deemed held by
Laurus or such Affiliate, as the case may be, as security for any and all of the
undersigned's obligations to Laurus and to any Affiliate of Laurus, no matter
how or when arising and whether under this or any other instrument, agreement or
otherwise.

      5. Representations and Warranties. Each of the undersigned respectively,
hereby jointly and severally represents and warrants (all of which
representations and warranties shall survive until all Obligations are
indefeasibly satisfied in full and the Documents have been irrevocably
terminated), that:

            (a) Corporate Status. It is a corporation, partnership or limited
      liability company, as the case may be, duly organized, validly existing
      and in good standing under the laws of its jurisdiction of organization
      indicated on the signature page hereof and has full power, authority and
      legal right to own its property and assets and to transact the business in
      which it is engaged.

            (b) Authority and Execution. It has full power, authority and legal
      right to execute and deliver, and to perform its obligations under, this
      Guaranty and has taken all necessary corporate, partnership or limited
      liability company, as the case may be, action to authorize the execution,
      delivery and performance of this Guaranty.

            (c) Legal, Valid and Binding Character. This Guaranty constitutes
      its legal, valid and binding obligation enforceable in accordance with its
      terms, except as enforceability may be limited by applicable bankruptcy,
      insolvency, reorganization, moratorium or other laws of general
      application affecting the enforcement of creditor's rights and general
      principles of equity that restrict the availability of equitable or legal
      remedies.

            (d) Violations. The execution, delivery and performance of this
      Guaranty will not violate any requirement of law applicable to it or any
      contract, agreement or instrument to it is a party or by which it or any
      of its property is bound or result in the creation or imposition of any
      mortgage, lien or other encumbrance other than to Laurus on any of its
      property or assets pursuant to the provisions of any of the foregoing,
      which, in any of the foregoing cases, could reasonably be expected to
      have, either individually or in the aggregate, a Material Adverse Effect.

            (e) Consents or Approvals. No consent of any other person or entity
      (including, without limitation, any creditor of the undersigned) and no
      consent, license, permit, approval or authorization of, exemption by,
      notice or report to, or registration, filing or declaration with, any
      governmental authority is required in connection with the execution,
      delivery, performance, validity or enforceability of this Guaranty by it,
      except to the extent that the failure to obtain any of the foregoing could
      not reasonably be expected to have, either individually or in the
      aggregate, a Material Adverse Effect.

            (f) Litigation. No litigation, arbitration, investigation or
      administrative proceeding of or before any court, arbitrator or
      governmental authority, bureau or agency is currently pending or, to the
      best of its knowledge, threatened (i) with respect to this Guaranty or any
      of the transactions contemplated by this Guaranty or (ii) against or
      affecting it, or any of its property or assets, which, in each of the
      foregoing cases, if adversely determined, could reasonably be expected to
      have a Material Adverse Effect.


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<PAGE>

            (g) Financial Benefit. It has derived or expects to derive a
      financial or other advantage from each and every loan, advance or
      extension of credit made under the Documents or other Obligation incurred
      by the Debtor to Laurus.

      6. Notice of Default. Each of the undersigned will promptly notify Laurus
of any default in excess of $250,000 by such undersigned in its respective
performance or observance of any term or condition of any agreement to which the
undersigned is a party if the effect of such default is to cause, or permit the
holder of any obligation under such agreement to cause, such obligation to
become due prior to its stated maturity, and if such event occurs, Laurus shall
have the right to accelerate such undersigned's obligations hereunder.

      7. Payments from Guarantors. Laurus, in its sole and absolute discretion,
with or without notice to the undersigned, may apply on account of the
Obligations any payment from the undersigned or any other guarantors, or amounts
realized from any security for the Obligations, or may deposit any and all such
amounts realized in a non-interest bearing cash collateral deposit account to be
maintained as security for the Obligations.

      8. Costs. The undersigned shall pay on demand, all costs, fees and
expenses (including expenses for legal services of every kind) relating or
incidental to the enforcement or protection of the rights of Laurus hereunder or
under any of the Obligations.

      9. No Termination. This is a continuing irrevocable guaranty and shall
remain in full force and effect and be binding upon the undersigned, and each of
the undersigned's successors and assigns, until all of the Obligations have been
paid in full and Laurus' obligation to extend credit pursuant to the Documents
has been irrevocably terminated. If any of the present or future Obligations are
guarantied by persons, partnerships or corporations in addition to the
undersigned, the death, release or discharge in whole or in part or the
bankruptcy, merger, consolidation, incorporation, liquidation or dissolution of
one or more of them shall not discharge or affect the liabilities of any
undersigned under this Guaranty.

      10. Recapture. Anything in this Guaranty to the contrary notwithstanding,
if Laurus receives any payment or payments on account of the liabilities
guaranteed hereby, which payment or payments or any part thereof are
subsequently invalidated, declared to be fraudulent or preferential, set aside
and/or required to be repaid to a trustee, receiver, or any other party under
any Insolvency Law, common law or equitable doctrine, then to the extent of any
sum not finally retained by Laurus, the undersigned's obligations to Laurus
shall be reinstated and this Guaranty shall remain in full force and effect (or
be reinstated) until payment shall have been made to Laurus, which payment shall
be due on demand.

      11. Books and Records. The books and records of Laurus showing the account
between Laurus and Debtor shall be admissible in evidence in any action or
proceeding, shall be binding upon the undersigned for the purpose of
establishing the items therein set forth and shall constitute prima facie proof
thereof.



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      12. No Waiver. No failure on the part of Laurus to exercise, and no delay
in exercising, any right, remedy or power hereunder shall operate as a waiver
thereof, nor shall any single or partial exercise by Laurus of any right, remedy
or power hereunder preclude any other or future exercise of any other legal
right, remedy or power. Each and every right, remedy and power hereby granted to
Laurus or allowed it by law or other agreement shall be cumulative and not
exclusive of any other, and may be exercised by Laurus at any time and from time
to time.

      13. Waiver of Jury Trial. EACH OF THE UNDERSIGNED DOES HEREBY KNOWINGLY,
VOLUNTARILY AND INTENTIONALLY WAIVE THE RIGHT TO TRIAL BY JURY IN ANY ACTION OR
PROCEEDING BASED ON OR WITH RESPECT TO THIS GUARANTY OR ANY OF THE TRANSACTIONS
CONTEMPLATED HEREBY OR RELATING OR INCIDENTAL HERETO. THE UNDERSIGNED DOES
HEREBY CERTIFY THAT NO REPRESENTATIVE OR AGENT OF LAURUS HAS REPRESENTED,
EXPRESSLY OR OTHERWISE, THAT LAURUS WOULD NOT, IN THE EVENT OF LITIGATION, SEEK
TO ENFORCE THIS WAIVER OF RIGHT TO JURY TRIAL PROVISION.

      14. Governing Law; Jurisdiction; Amendments. THIS INSTRUMENT CANNOT BE
CHANGED OR TERMINATED ORALLY, AND SHALL BE GOVERNED, CONSTRUED AND INTERPRETED
AS TO VALIDITY, ENFORCEMENT AND IN ALL OTHER RESPECTS IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK WITHOUT HAVING EFFECT TO PRINCIPLES OF CONFLICTS
OF LAWS. EACH OF THE UNDERSIGNED EXPRESSLY CONSENTS TO THE JURISDICTION AND
VENUE OF THE SUPREME COURT OF THE STATE OF NEW YORK, COUNTY OF NEW YORK, AND OF
THE UNITED STATES DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW YORK FOR ALL
PURPOSES IN CONNECTION HEREWITH. ANY JUDICIAL PROCEEDING BY THE UNDERSIGNED
AGAINST LAURUS INVOLVING, DIRECTLY OR INDIRECTLY ANY MATTER OR CLAIM IN ANY WAY
ARISING OUT OF, RELATED TO OR CONNECTED HEREWITH SHALL BE BROUGHT ONLY IN THE
SUPREME COURT OF THE STATE OF NEW YORK, COUNTY OF NEW YORK OR THE UNITED STATES
DISTRICT COURT FOR THE SOUTHERN DISTRICT OF NEW YORK. THE UNDERSIGNED FURTHER
CONSENTS THAT ANY SUMMONS, SUBPOENA OR OTHER PROCESS OR PAPERS (INCLUDING,
WITHOUT LIMITATION, ANY NOTICE OR MOTION OR OTHER APPLICATION TO EITHER OF THE
AFOREMENTIONED COURTS OR A JUDGE THEREOF) OR ANY NOTICE IN CONNECTION WITH ANY
PROCEEDINGS HEREUNDER, MAY BE SERVED INSIDE OR OUTSIDE OF THE STATE OF NEW YORK
OR THE SOUTHERN DISTRICT OF NEW YORK BY REGISTERED OR CERTIFIED MAIL, RETURN
RECEIPT REQUESTED, OR BY PERSONAL SERVICE PROVIDED A REASONABLE TIME FOR
APPEARANCE IS PERMITTED, OR IN SUCH OTHER MANNER AS MAY BE PERMISSIBLE UNDER THE
RULES OF SAID COURTS. EACH OF THE UNDERSIGNED WAIVES ANY OBJECTION TO
JURISDICTION AND VENUE OF ANY ACTION INSTITUTED HEREON AND SHALL NOT ASSERT ANY
DEFENSE BASED ON LACK OF JURISDICTION OR VENUE OR BASED UPON FORUM NON
CONVENIENS.

      15. Severability. To the extent permitted by applicable law, any provision
of this Guaranty which is prohibited or unenforceable in any jurisdiction shall,
as to such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof, and any
such prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.



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<PAGE>

      16. Amendments, Waivers. No amendment or waiver of any provision of this
Guaranty nor consent to any departure by the undersigned therefrom shall in any
event be effective unless the same shall be in writing executed by each of the
undersigned directly affected by such amendment and/or waiver and Laurus.

      17. Notice. All notices, requests and demands to or upon the undersigned,
shall be in writing and shall be deemed to have been duly given or made (a) when
delivered, if by hand, (b) three (3) days after being sent, postage prepaid, if
by registered or certified mail, (c) when confirmed electronically, if by
facsimile, or (d) when delivered, if by a recognized overnight delivery service
in each event, to the numbers and/or address set forth beneath the signature of
the undersigned.

      18. Successors. Laurus may, from time to time, without notice to the
undersigned, sell, assign, transfer or otherwise dispose of all or any part of
the Obligations and/or rights under this Guaranty. Without limiting the
generality of the foregoing, Laurus may assign, or grant participations to, one
or more banks, financial institutions or other entities all or any part of any
of the Obligations. In each such event, Laurus, its Affiliates and each and
every immediate and successive purchaser, assignee, transferee or holder of all
or any part of the Obligations shall have the right to enforce this Guaranty, by
legal action or otherwise, for its own benefit as fully as if such purchaser,
assignee, transferee or holder were herein by name specifically given such
right. Laurus shall have an unimpaired right to enforce this Guaranty for its
benefit with respect to that portion of the Obligations which Laurus has not
disposed of, sold, assigned, or otherwise transferred.

      19. Release. Nothing except cash payment in full of the Obligations shall
release any of the undersigned from liability under this Guaranty.

                        [REMAINDER OF THIS PAGE IS BLANK.
                       SIGNATURE PAGE IMMEDIATELY FOLLOWS]


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      IN WITNESS WHEREOF, this Guaranty has been executed by the undersigned
this 27th day of May, 2004.


                               GVI SECURITY, INC.

                               By:
                                       -----------------------------------------
                               Name:
                                       -----------------------------------------
                               Title:
                                       -----------------------------------------

                               Address:     1621 West Crosby, Suite 104
                                            Carrollton, Texas 75006
                               Telephone:   (972) 245-7353
                               Facsimile:   (972) 245-7333
                               State of Incorporation:   Delaware


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