SPECIMEN WARRANT CERTIFICATE


  NUMBER                                                                WARRANTS
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                       (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
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                              (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:

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Dated:
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                                           (SIGNATURE)


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


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                                           -------------------------------------
                                           (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
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                              (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.


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