Document:

SPECIMEN WARRANT CERTIFICATE

  NUMBER                                                                WARRANTS
         -
---------

                       (SEE REVERSE SIDE FOR LEGEND) (THIS
            WARRANT WILL BE VOID IF NOT EXERCISED PRIOR TO 5:00 P.M.
                      NEW YORK CITY TIME, __________, 2010

                   VECTOR INTERSECT SECURITY ACQUISITION CORP.

                                                                           CUSIP

                                     WARRANT

THIS CERTIFIES THAT, for value received

is the registered holder of a Warrant or Warrants expiring ________, 2010 (the
"Warrant") to purchase one fully paid and non-assessable share of Common Stock,
par value $.001 per share ("Shares"), of Vector Intersect Security Acquisition
Corp., a Delaware corporation (the "Company"), for each Warrant evidenced by
this Warrant Certificate. The Warrant entitles the holder thereof to purchase
from the Company, commencing on the later of (i) the Company's completion of a
business combination with a target business or (ii) __________, 2006, such
number of Shares of the Company at the price of $6.00 per share, upon surrender
of this Warrant Certificate and payment of the Warrant Price at the office or
agency of the Warrant Agent, American Stock Transfer & Trust Company (such
payment to be made by check made payable to the Warrant Agent), but only subject
to the conditions set forth herein and in the Warrant Agreement between the
Company and American Stock Transfer & Trust Company. The Warrant Agreement
provides that upon the occurrence of certain events the Warrant Price and the
number of Warrant Shares purchasable hereunder, set forth on the face hereof,
may, subject to certain conditions, be adjusted. The term Warrant Price as used
in this Warrant Certificate refers to the price per Share at which Shares may be
purchased at the time the Warrant is exercised.

     No fraction of a Share will be issued upon any exercise of a Warrant. If,
upon exercise of a Warrant, a holder would be entitled to receive a fractional
interest in a Share, the Company will, upon exercise, round up to the nearest
whole number the number of shares of common stock to be issued to the warrant
holder.

     Upon any exercise of the Warrant for less than the total number of full
Shares provided for herein, there shall be issued to the registered holder
hereof or his assignee a new Warrant Certificate covering the number of Shares
for which the Warrant has not been exercised.

     Warrant Certificates, when surrendered at the office or agency of the
Warrant Agent by the registered holder hereof in person or by attorney duly
authorized in writing, may be exchanged in the manner and subject to the
limitations provided in the Warrant Agreement, but without payment of any
service charge, for another Warrant Certificate or Warrant Certificates of like
tenor and evidencing in the aggregate a like number of Warrants.

     Upon due presentment for registration of transfer of the Warrant
Certificate at the office or agency of the Warrant Agent, a new Warrant
Certificate or Warrant Certificates of like tenor and

evidencing in the aggregate a like number of Warrants shall be issued to the
transferee in exchange for this Warrant Certificate, subject to the limitations
provided in the Warrant Agreement, without charge except for any applicable tax
or other governmental charge.

     The Company and the Warrant Agent may deem and treat the registered holder
as the absolute owner of this Warrant Certificate (notwithstanding any notation
of ownership or other writing hereon made by anyone), for the purpose of any
exercise hereof, of any distribution to the registered holder, and for all other
purposes, and neither the Company nor the Warrant Agent shall be affected by any
notice to the contrary.

     This Warrant does not entitle the registered holder to any of the rights of
a stockholder of the Company.

     The Company reserves the right to call the Warrant at any time prior to its
exercise, with a notice of call in writing to the holders of record of the
Warrant, giving 30 days' notice of such call at any time after the Warrant
becomes exercisable if the last sale price of the Shares has been at least
$11.50 per share on each of 20 trading days within any 30 trading day period
ending on the third business day prior to the date on which notice of such call
is given. The call price of the Warrants is to be $.01 per Warrant. Any Warrant
either not exercised or tendered back to the Company by the end of the date
specified in the notice of call shall be canceled on the books of the Company
and have no further value except for the $.01 call price.

By
  -------------------------------------     ------------------------------------
                              Secretary     Chairman of the Board

                                SUBSCRIPTION FORM
      To Be Executed by the Registered Holder in Order to Exercise Warrants

The undersigned Registered Holder irrevocably elects to exercise ______________
Warrants represented by this Warrant Certificate, and to purchase the shares of
Common Stock issuable upon the exercise of such Warrants, and requests that
Certificates for such shares shall be issued in the name of

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                     (PLEASE TYPE OR PRINT NAME AND ADDRESS)

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

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

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                 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER)

and be delivered to
                    ------------------------------------------------------------
                              (PLEASE PRINT OR TYPE NAME AND ADDRESS)

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and, if such number of Warrants shall not be all the Warrants evidenced by this
Warrant Certificate, that a new Warrant Certificate for the balance of such
Warrants be registered in the name of, and delivered to, the Registered Holder
at the address stated below:

                                       2

Dated:
      -----------------------------        -------------------------------------
                                           (SIGNATURE)

                                           -------------------------------------
                                           (ADDRESS)

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

                                           -------------------------------------
                                           (TAX IDENTIFICATION NUMBER)

                                   ASSIGNMENT

         To Be Executed by the Registered Holder in Order to Assign Warrants For
Value Received, _______________________ hereby sell, assign, and transfer unto

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                     (PLEASE TYPE OR PRINT NAME AND ADDRESS)

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

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

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                 (SOCIAL SECURITY OR TAX IDENTIFICATION NUMBER)

and be delivered to
                    ------------------------------------------------------------
                              (PLEASE PRINT OR TYPE NAME AND ADDRESS)

_____________________ of the Warrants represented by this Warrant Certificate,
and hereby irrevocably constitute and appoint __________________________________
Attorney to transfer this Warrant Certificate on the books of the Company, with
full power of substitution in the premises.

Dated:
      ------------------------------            --------------------------------
                                                          (SIGNATURE)

THE SIGNATURE TO THE ASSIGNMENT OF THE SUBSCRIPTION FORM MUST CORRESPOND TO THE
NAME WRITTEN UPON THE FACE OF THIS WARRANT CERTIFICATE IN EVERY PARTICULAR,
WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATSOEVER, AND MUST BE
GUARANTEED BY A COMMERCIAL BANK OR TRUST COMPANY OR A MEMBER FIRM OF THE
AMERICAN STOCK EXCHANGE, NEW YORK STOCK EXCHANGE, PACIFIC STOCK EXCHANGE OR
CHICAGO STOCK EXCHANGE.

                                       3INVESTMENT MANAGEMENT TRUST AGREEMENT

                  This Agreement is made as of _____, 2005 by and between Vector
Intersect Security Acquisition Corp. (the "Company") and American Stock Transfer
& Trust Company ("Trustee").

                  WHEREAS, the Company's Registration Statement on Form S-1, No.
333- ________ ("Registration Statement"), for its initial public offering of
securities ("IPO") has been declared effective as of the date hereof by the
Securities and Exchange Commission ("Effective Date"); and

                  WHEREAS, Rodman & Renshaw, LLC ("Rodman") is acting as the
representative of the underwriters in the IPO; and

                  WHEREAS, as described in the Company's Registration Statement,
and in accordance with the Company's Certificate of Incorporation, $138,375,000
of the net proceeds of the IPO ($159,131,250 if the underwriters' over-allotment
option is exercised in full) will be delivered to the Trustee to be deposited
and held in a trust account for the benefit of the Company and the holders of
the Company's Common Stock issued in the IPO and in the event the Units are
registered in Colorado, pursuant to Section 11-51-302(6) of the Colorado Revised
Statutes, a copy of which statute is attached hereto and made a part hereof. The
amount to be delivered to the Trustee will be referred to herein as the
"Property," the stockholders for whose benefit the Trustee shall hold the
Property will be referred to as the "Public Stockholders," and the Public
Stockholders and the Company will be referred to together as the
"Beneficiaries"); and

                  WHEREAS, the Company and the Trustee desire to enter into this
Agreement to set forth the terms and conditions pursuant to which the Trustee
shall hold the Property;

                  IT IS AGREED:

1.     Agreements and Covenants of Trustee. The Trustee hereby agrees and
covenants to:

                  (a)    Hold the Property in trust for the Beneficiaries in
accordance with the terms of this Agreement, including the terms of Section
11-51-302(6) of the Colorado Statute, in a segregated trust account ("Trust
Account") established by the Trustee at a branch of JPMorgan Chase NY Bank
selected by the Trustee;

                  (b)    Manage, supervise and administer the Trust Account
subject to the terms and conditions set forth herein;

                  (c)    In a timely manner, upon the instruction of the
Company, to invest and reinvest the Property in any "Government Security." As
used herein, Government Security means any Treasury Bill issued by the United
States, having a maturity of one hundred and eighty days or less;

                  (d)    Collect and receive, when due, all principal and income
arising from the Property, which shall become part of the "Property," as such
term is used herein;

                  (e)    Notify the Company and Rodman of all communications
received by it with respect to any Property requiring action by the Company;

                  (f)    Supply any necessary information or documents as may be
requested by the Company in connection with the Company's preparation of the tax
returns for the Trust Account;

                  (g)    Participate in any plan or proceeding for protecting or
enforcing any right or interest arising from the Property if, as and when
instructed by the Company and/or Rodman to do so;

                  (h)    Render to the Company and to Rodman, and to such other
person as the Company may instruct, monthly written statements of the activities
of and amounts in the Trust Account reflecting all receipts and disbursements of
the Trust Account;

                  (i)    Upon written instructions from the Company, deliver to
the Company, on a quarterly basis, from the Property in the Trust Account, an
amount equal to the taxes payable by the Company, if any, relating to interest
earned on the Property; and

                  (j)    Commence liquidation of the Trust Account promptly
after receipt of and only in accordance with the terms of a letter ("Termination
Letter"), in a form substantially similar to that attached hereto as either
Exhibit A or Exhibit B, signed on behalf of the Company by its Chief Executive
Officer or Chairman of the Board and Secretary and affirmed by its entire Board
of Directors, and complete the liquidation of the Trust Account and distribute
the Property in the Trust Account only as directed in the Termination Letter and
the other documents referred to therein; provided, however, that in the event
that a Termination Letter has not been received by _______ ___, 2007 (or the
date that is the six month anniversary of such date, in the event that a letter
of intent, agreement in principle or definitive agreement has been executed
prior to such date in connection with a Business Combination (as defined in the
Termination Letter attached hereto as Exhibit A) that was not consummated by
_______ ___, 2007), the Trust Account shall be liquidated in accordance with the
procedures set forth in the Termination Letter attached as Exhibit B to the
stockholders of record on the record date; provided, further, that the record
date shall be within ten (10) days of _______ ___, 2007 (or the date that is the
six month anniversary of such date, in the event that a letter of intent,
agreement in principle or definitive agreement has been executed prior to such
date in connection with a Business Combination that was not consummated by
_______ ___, 2007), or as soon thereafter as is practicable.

2.     Agreements and Covenants of the Company. The Company hereby agrees and
covenants to:

                  (a)    Give all instructions to the Trustee hereunder in
writing, signed by the Company's Chief Executive Officer or Chairman of the
Board. In addition, except with respect to its duties under paragraph 1(i)
above, the Trustee shall be entitled to rely on, and shall be protected in
relying on, any verbal or telephonic advice or instruction which it in good
faith believes to be given by any one of the persons authorized above to give
written instructions, provided that the Company shall promptly confirm such
instructions in writing;

                  (b)    Hold the Trustee harmless and indemnify the Trustee
from and against any and all expenses, including reasonable counsel fees and
disbursements, or loss suffered by the

                                       2

Trustee in connection with any action, suit or other proceeding brought against
the Trustee involving any claim, or in connection with any claim or demand which
in any way arises out of or relates to this Agreement, the services of the
Trustee hereunder, or the Property or any income earned from investment of the
Property, except for expenses and losses resulting from the Trustee's gross
negligence or willful misconduct. Promptly after the receipt by the Trustee of
notice of demand or claim or the commencement of any action, suit or proceeding,
pursuant to which the Trustee intends to seek indemnification under this
paragraph, it shall notify the Company in writing of such claim (hereinafter
referred to as the "Indemnified Claim"). The Trustee shall have the right to
conduct and manage the defense against such Indemnified Claim, provided, that
the Trustee shall obtain the consent of the Company with respect to the
selection of counsel, which consent shall not be unreasonably withheld. The
Company may participate in such action with its own counsel;

                  (c)    Pay the Trustee an initial acceptance fee of $1,000 and
an annual fee of $3,000 (it being expressly understood that the Property shall
not be used to pay such fee). The Company shall pay the Trustee the initial
acceptance fee and first year's fee at the consummation of the IPO and
thereafter on the anniversary of the Effective Date. The Trustee shall refund to
the Company the fee (on a pro rata basis) with respect to any period after the
liquidation of the Trust Fund. The Company shall not be responsible for any
other fees or charges of the Trustee except as may be provided in paragraph 2(b)
hereof (it being expressly understood that the Property shall not be used to
make any payments to the Trustee under such paragraph);

                  (d)    Provide to the Trustee any letter of intent, agreement
in principle or definitive agreement that is executed prior to _______ ___, 2007
in connection with a Business Combination; and

                  (e)    In connection with any vote of the Company's
stockholders regarding a Business Combination, provide to the Trustee an
affidavit or certificate of a firm regularly engaged in the business of
soliciting proxies and tabulating stockholder votes (which firm may be the
Trustee) verifying the vote of the Company's stockholders regarding such
Business Combination.

3.     Limitations of Liability. The Trustee shall have no responsibility or
liability to:

                  (a)    Take any action with respect to the Property, other
than as directed in paragraph 1 hereof and the Trustee shall have no liability
to any party except for liability arising out of its own gross negligence or
willful misconduct;

                  (b)    Institute any proceeding for the collection of any
principal and income arising from, or institute, appear in or defend any
proceeding of any kind with respect to, any of the Property unless and until it
shall have received instructions from the Company given as provided herein to do
so and the Company shall have advanced or guaranteed to it funds sufficient to
pay any expenses incident thereto;

                  (c)    Change the investment of any Property, other than in
compliance with paragraph 1(c);

                  (d)    Refund any depreciation in principal of any Property;

                                       3

                  (e)    Assume that the authority of any person designated by
the Company to give instructions hereunder shall not be continuing unless
provided otherwise in such designation, or unless the Company shall have
delivered a written revocation of such authority to the Trustee;

                  (f)    The other parties hereto or to anyone else for any
action taken or omitted by it, or any action suffered by it to be taken or
omitted, in good faith and in the exercise of its own best judgment, except for
its gross negligence or willful misconduct. The Trustee may rely conclusively
and shall be protected in acting upon any order, notice, demand, certificate,
opinion or advice of counsel (including counsel chosen by the Trustee),
statement, instrument, report or other paper or document (not only as to its due
execution and the validity and effectiveness of its provisions, but also as to
the truth and acceptability of any information therein contained) which is
believed by the Trustee, in good faith, to be genuine and to be signed or
presented by the proper person or persons. The Trustee shall not be bound by any
notice or demand, or any waiver, modification, termination or rescission of this
agreement or any of the terms hereof, unless evidenced by a written instrument
delivered to the Trustee signed by the proper party or parties and, if the
duties or rights of the Trustee are affected, unless it shall give its prior
written consent thereto; and

                  (g)    Verify the correctness of the information set forth in
the Registration Statement or to confirm or assure that any acquisition made by
the Company or any other action taken by it is as contemplated by the
Registration Statement.

                  (h)    Subject to the requirements of Section 1(i) of the
Trust Agreement, pay any taxes on behalf of the Trust Account to any
governmental entity or taxing authority.

4.     Termination. This Agreement shall terminate as follows:

                  (a)    If the Trustee gives written notice to the Company that
it desires to resign under this Agreement, the Company shall use its reasonable
efforts to locate a successor trustee. At such time that the Company notifies
the Trustee that a successor trustee has been appointed by the Company and has
agreed to become subject to the terms of this Agreement, the Trustee shall
transfer the management of the Trust Account to the successor trustee, including
but not limited to the transfer of copies of the reports and statements relating
to the Trust Account, whereupon this Agreement shall terminate; provided,
however, that, in the event that the Company does not locate a successor trustee
within ninety days of receipt of the resignation notice from the Trustee, the
Trustee may submit an application to have the Property deposited with the United
States District Court for the Southern District of New York and upon such
deposit, the Trustee shall be immune from any liability whatsoever that arises
due to any actions or omissions to act by any party after such deposit; or

                  (b)    At such time that the Trustee has completed the
liquidation of the Trust Account in accordance with the provisions of paragraph
1(j) hereof, and distributed the Property in accordance with the provisions of
the Termination Letter, this Agreement shall terminate except with respect to
Paragraph 2(b).

5.     Miscellaneous.

                  (a)    The Company and the Trustee each acknowledge that the
Trustee will follow the security procedures set forth below with respect to
funds transferred from the Trust

                                       4

Account. Upon receipt of written instructions, the Trustee will confirm such
instructions with an Authorized Individual at an Authorized Telephone Number
listed on the attached Exhibit C. The Company and the Trustee will each restrict
access to confidential information relating to such security procedures to
authorized persons. Each party must notify the other party immediately if it has
reason to believe unauthorized persons may have obtained access to such
information, or of any change in its authorized personnel. In executing funds
transfers, the Trustee will rely upon account numbers or other identifying
numbers of a beneficiary, beneficiary's bank or intermediary bank, rather than
names. The Trustee shall not be liable for any loss, liability or expense
resulting from any error in an account number or other identifying number,
provided it has accurately transmitted the numbers provided.

                  (b)    This Agreement shall be governed by and construed and
enforced in accordance with the laws of the State of New York, without giving
effect to conflict of laws. It may be executed in several counterparts, each one
of which shall constitute an original, and together shall constitute but one
instrument.

                  (c)    This Agreement contains the entire agreement and
understanding of the parties hereto with respect to the subject matter hereof.
This Agreement or any provision hereof may only be changed, amended or modified
by a writing signed by each of the parties hereto; provided, however, that no
such change, amendment or modification may be made without the prior written
consent of Rodman. As to any claim, cross-claim or counterclaim in any way
relating to this Agreement, each party waives the right to trial by jury.

                  (d)    The parties hereto consent to the jurisdiction and
venue of any state or federal court located in the City of New York for purposes
of resolving any disputes hereunder.

                  (e)    Any notice, consent or request to be given in
connection with any of the terms or provisions of this Agreement shall be in
writing and shall be sent by express mail or similar private courier service, by
certified mail (return receipt requested), by hand delivery or by facsimile
transmission:

                  if to the Trustee, to:

                         American Stock Transfer
                         & Trust Company
                         59 Maiden Lane
                         New York, New York 10038
                         Attn:    George Karfunkel

                  if to the Company, to:

                         Vector Intersect Security Acquisition Corp.
                         One Embarcadero Center
                         San Francisco, CA 94111
                         Attn:    Isaac Applbaum, Chairman of the Board

                                       5

                  in either case with a copy to:

                         Rodman & Renshaw, LLC
                         330 Madison Avenue
                         New York, New York 10017
                         Attn:    Edward Kovalik
                         Fax No.:  (212) 356-0536

                         and

                         Loeb & Loeb, LLP
                         345Park Avenue
                         New York, New York 10154
                         Attn: Mitchell Nussbaum, Esq.
                         Fax No.: (212) 937-3943

                  (f)    This Agreement may not be assigned by the Trustee
without the prior written consent of the Company and Rodman.

                  (g)    Each of the Trustee and the Company hereby represents
that it has the full right and power and has been duly authorized to enter into
this Agreement and to perform its respective obligations as contemplated
hereunder. The Trustee acknowledges and agrees that it shall not make any claims
or proceed against the Trust Account, including by way of set-off, and shall not
be entitled to any funds in the Trust Account under any circumstance.

                  IN WITNESS WHEREOF, the parties have duly executed this
Investment Management Trust Agreement as of the date first written above.

                                     AMERICAN STOCK TRANSFER & TRUST
                                     COMPANY, as Trustee

                                     By: ____________________________
                                         Name:
                                         Title:

                                     VECTOR INTERSECT SECURITY ACQUISITION CORP.

                                     By: ____________________________
                                         Name:     Marc Abramowitz
                                         Title:    Chief Executive Officer
                                                   and President

                                       6

EXHIBIT A
                             [LETTERHEAD OF COMPANY]

[INSERT DATE]

American Stock Transfer
  & Trust Company
59 Maiden Lane
New York, New York 10038
Attn:  George Karfunkel

                  Re:    Trust Account No. [           ] Termination Letter
                         --------------------------------------------------

Gentlemen:

                  Pursuant to paragraph 1(j) of the Investment Management Trust
Agreement between Vector Intersect Security Acquisition Corp. ("Company") and
American Stock Transfer & Trust Company ("Trustee"), dated as of __________,
2005 ("Trust Agreement"), this is to advise you that the Company has entered
into an agreement ("Business Agreement") with __________________ ("Target
Business") to consummate a business combination with Target Business ("Business
Combination") on or about [insert date]. The Company shall notify you at least
48 hours in advance of the actual date of the consummation of the Business
Combination ("Consummation Date").

                  Pursuant to Section 2(d) of the Trust Agreement, we are
providing you with [an affidavit] [a certificate] of ________________, which
verifies the vote of the Company's stockholders in connection with the Business
Combination. In accordance with the terms of the Trust Agreement, we hereby
authorize you to commence liquidation of the Trust Account to the effect that,
on the Consummation Date, all of funds held in the Trust Account will be
immediately available for transfer to the account or accounts that the Company
shall direct on the Consummation Date.

                  On the Consummation Date (i) counsel for the Company shall
deliver to you written notification that (a) the Business Combination has been
consummated and (b) the provisions of Section 11-51-302(6) and Rule 51-3.4 of
the Colorado Statute have been met, and (ii) the Company shall deliver to you
written instructions with respect to the transfer of the funds held in the Trust
Account ("Instruction Letter"). You are hereby directed and authorized to
transfer the funds held in the Trust Account immediately upon your receipt of
the counsel's letter and the Instruction Letter, in accordance with the terms of
the Instruction Letter. In the event that certain deposits held in the Trust
Account may not be liquidated by the Consummation Date without penalty, you will
notify the Company of the same and the Company shall direct you as to whether
such funds should remain in the Trust Account and distributed after the
Consummation Date to the Company. Upon the distribution of all the funds in the
Trust Account pursuant to the terms hereof, the Trust Agreement shall be
terminated.

                  In the event that the Business Combination is not consummated
on the Consummation Date described in the notice thereof and we have not
notified you on or before the original Consummation Date of a new Consummation
Date, then the funds held in the Trust

                                      C-1

Account shall be reinvested as provided in the Trust Agreement on the business
day immediately following the Consummation Date as set forth in the notice.

                Very truly yours,

                VECTOR INTERSECT SECURITY  ACQUISITION CORP.

         By:
                --------------------------------------------
                Marc Abramowitz, Chief Executive Officer and President

         By:
                --------------------------------------------
                Isaac Applbaum, Chairman, EVP and Secretary

         AFFIRMED:

         --------------------------------------------
         Marc Abramowitz, Director

         --------------------------------------------
         Isaac Applbaum, Director

         --------------------------------------------
         Abraham Sofaer, Director

         --------------------------------------------
         Max Weiss, Director

         --------------------------------------------
         Archie Clemins, Director

         --------------------------------------------
         Joseph T. Gorman, Director

                                      C-2

EXHIBIT B

                             [LETTERHEAD OF COMPANY]

[INSERT DATE]

American Stock Transfer
  & Trust Company
59 Maiden Lane
New York, New York 10004
Attn:  George Karfunkel

                  Re:    Trust Account No. [           ] Termination Letter
                         --------------------------------------------------
Gentlemen:

                  Pursuant to paragraph 1(j) of the Investment Management Trust
Agreement between Vector Intersect Security Acquisition Corp. ("Company") and
American Stock Transfer & Trust Company dated as of _____________, 2005 ("Trust
Agreement"), this is to advise you that the Board of Directors of the Company
has voted to dissolve and liquidate the Company. Attached hereto is a copy of
the minutes of the meeting of the Board of Directors of the Company relating
thereto, certified by the Secretary of the Company as true and correct and in
full force and effect.

                  In accordance with the terms of the Trust Agreement, we hereby
(a) certify to you that the provisions of Section 11-51-302(6) and Rule 51-3.4
of the Colorado Statute have been met and (b) authorize you, to commence
liquidation of the Trust Account. In connection with this liquidation, you are
hereby authorized to establish a record date for the purposes of determining the
stockholders of record entitled to receive their per share portion of the Trust
Account. The record date shall be within ten (10) days of the liquidation date,
or as soon thereafter as is practicable. You will notify the Company in writing
as to when all of the funds in the Trust Account will be available for immediate
transfer ("Transfer Date") in accordance with the terms of the Trust Agreement
and the Amended and Restated Certificate of Incorporation of the Company. You
shall commence distribution of such funds in accordance with the terms of the
Trust Agreement and the Amended and Restated Certificate of Incorporation of the
Company and you shall oversee the distribution of the funds. Upon the payment of
all the funds in the Trust Account, the Trust Agreement shall be terminated.

                                      C-3

                        Very truly yours,

                        VECTOR INTERSECT SECURITY ACQUISITION CORP.

                        By:
                            ----------------------------------------------
                        Marc Abramowitz, Chief Executive Officer and
                        President

                        By:
                            ----------------------------------------------
                            Isaac Applbaum, Chairman, EVP and Secretary

                            AFFIRMED:

                            -----------------------------------
                            Marc Abramowitz, Director

                            -----------------------------------
                            Isaac Applbaum, Director

                            -----------------------------------
                            Abraham Sofaer, Director

                            -----------------------------------
                            Max Weiss, Director

                            -----------------------------------
                            Archie Clemins, Director

                            -----------------------------------
                            Joseph T. Gorman, Director

                                  C-4

EXHIBIT C

<TABLE>

------------------------------------------------------------ ---------------------------------------------------------
AUTHORIZED INDIVIDUAL(S)                                     AUTHORIZED
FOR TELEPHONE CALL BACK                                      TELEPHONE NUMBER(S)
------------------------------------------------------------ ---------------------------------------------------------

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

------------------------------------------------------------ ---------------------------------------------------------
COMPANY:
------------------------------------------------------------ ---------------------------------------------------------

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

Vector Intersect Security Acquisition Corp.,
One Embarcadero  Center,  San Francisco,  California 94111,
Attention: Isaac Applbaum, Chairman of the Board             (415) 773-2723
------------------------------------------------------------ ---------------------------------------------------------

------------------------------------------------------------ ---------------------------------------------------------
TRUSTEE:
------------------------------------------------------------ ---------------------------------------------------------

------------------------------------------------------------ ---------------------------------------------------------
American Stock Transfer & Trust Company
59 Maiden Lane, New York, New York 10004
Attn:  George Karfunkel
------------------------------------------------------------ ---------------------------------------------------------

</TABLE>

MIA-FS1\cantorl\1729132v02\1KZJC02_.DOC\8/15/05\89910.010100

                                      C-5

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