NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY.  THIS SECURITY AND THE SECURITIES ISSUABLE UPON CONVERSION OF THIS SECURITY MAY BE PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY SUCH SECURITIES.

Original Issue Date:	December 11, 2009
Original Conversion Price (subject to adjustment herein):	$0.75
Original Principal Amount:	$________

5% SECURED CONVERTIBLE DEBENTURE

DUE DECEMBER 10, 2011

THIS 5% SECURED CONVERTIBLE DEBENTURE is one of a series of duly authorized and validly issued 5% Secured Convertible Debentures of Mitek Systems, Inc., a Delaware corporation (the "Company"), having its principal place of business at 8911 Balboa Ave, Suite B, San Diego, California 92123, designated as its 5% Secured Convertible Debenture due December 10, 2011 (this debenture, the "Debenture" and, collectively with the other debentures of such series, the "Debentures").

FOR VALUE RECEIVED, the Company promises to pay pursuant to the terms hereunder to _____________________ or its registered assigns (the "Holder"), the principal sum of $____________ on December 11, 2011 (the "Maturity Date") or such earlier date as this Debenture is required or permitted to be repaid as provided hereunder, and to pay interest to the Holder on the aggregate unconverted and then outstanding principal amount of this Debenture in accordance with the provisions hereof.  This Debenture is subject to the following additional provisions:

Section 1.             Definitions.  For the purposes hereof, in addition to the terms defined elsewhere in this Debenture, the following terms shall have the following meanings:

"Business Day" means any day except any Saturday, any Sunday, any day which is a federal legal holiday in the United States or any day on which banking institutions in the State of California are authorized or required by law or other governmental action to close.

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"Common Stock" means the common stock of the Company, par value $0.001 per share, and any other class of securities into which such securities may hereafter be reclassified or changed.

"Conversion Schedule" means the Conversion Schedule in the form of Schedule 1 attached hereto.

"Conversion Shares" means, collectively, the shares of Common Stock issuable upon conversion of this Debenture in accordance with the terms hereof.

"Debenture Register" means the records of the Company regarding registration and transfers of this Debenture.

"Exchange Act" means the Securities Exchange Act of 1934, as amended.

"Original Issue Date" means the date of the first issuance of the Debentures, regardless of any transfers of any Debenture and regardless of the number of instruments which may be issued to evidence such Debentures.

"Person" means an individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.

"Purchase Agreement" means the Securities Purchase Agreement, dated as of December 10, 2009 among the Company and the original holders of Debentures, as amended, modified or supplemented from time to time in accordance with its terms.

"Rule 144" means Rule 144 promulgated under the Securities Act, as such rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule.

"Securities Act" means the Securities Act of 1933, as amended.

"Trading Day" means a day on which the principal Trading Market is open for trading.

"Trading Market" means any of the following markets or exchanges on which the Common Stock is listed or quoted for trading on the date in question: the NYSE Amex, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York Stock Exchange or the OTC Bulletin Board (or any successors to any of the foregoing); provided, however, if on the date in question the Common Stock is not listed or quoted for trading on any of the foregoing markets or exchanges, "Trading Market" shall mean the New York Stock Exchange.

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Section 2.             Interest.

a)           Payment of Interest in Cash or Kind. The Company shall pay interest to the Holder on the aggregate unconverted and then outstanding principal amount of this Debenture at the rate of 5% per annum, payable on each Conversion Date (as to that principal amount then being converted), on each Optional Redemption Date (as to that principal amount then being redeemed) and on the Maturity Date (each such date, an “Interest Payment Date”) (if any Interest Payment Date is not a Business Day, then the applicable payment shall be due on the next succeeding Business Day), in cash or duly authorized, validly issued, fully paid and non-assessable shares of Common Stock at the Conversion Price (the dollar amount to be paid in shares of Common Stock, the “Interest Share Amount”) or a combination thereof.

b)           Interest Calculations. Interest shall be calculated on the basis of a 360-day year, consisting of twelve 30 calendar day periods, and shall accrue daily commencing on the Original Issue Date until payment in full of the principal sum, together with all accrued and unpaid interest and other amounts which may become due hereunder, has been made.  Payment of interest in shares of Common Stock shall occur pursuant to Section 4(c) herein and, solely for purposes of the payment of interest in shares, the Interest Payment Date shall be deemed the Conversion Date.  Interest hereunder will be paid to the Person in whose name this Debenture is registered on the Debenture Register.  Except as otherwise provided herein, if at any time the Company pays interest partially in cash and partially in shares of Common Stock to the holders of the Debentures, then such payment of cash shall be distributed ratably among the holders of the then-outstanding Debentures based on their (or their predecessor’s) initial purchases of Debentures pursuant to the Purchase Agreement.

c)           Late Fee.  All overdue accrued and unpaid interest to be paid hereunder shall entail a late fee at an interest rate equal to the lesser of 12% per annum or the maximum rate permitted by applicable law which shall accrue daily from the date such interest is due hereunder through and including the date of payment in full.

Section 3.             Registration of Transfers and Exchanges.

a)           Different Denominations. This Debenture is exchangeable for an equal aggregate principal amount of Debentures of different authorized denominations, as requested by the Holder surrendering the same.  No service charge will be payable for such registration of transfer or exchange.

b)           Investment Representations. This Debenture has been issued subject to certain investment representations of the original Holder set forth in the Purchase Agreement and may be transferred or exchanged only in compliance with the Purchase Agreement and applicable federal and state securities laws and regulations.

c)           Reliance on Debenture Register. Prior to due presentment for transfer to the Company of this Debenture, the Company and any agent of the Company may treat the Person in whose name this Debenture is duly registered on the Debenture Register as the owner hereof for the purpose of receiving payment as herein provided and for all other purposes, whether or not this Debenture is overdue, and neither the Company nor any such agent shall be affected by notice to the contrary.

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Section 4.             Conversion.

a)           Voluntary Conversion. Subject to the provisions of this Section 4(a), at any time after the Original Issue Date until this Debenture is no longer outstanding, this Debenture shall be convertible, in whole or in part, into shares of Common Stock at the option of the Holder, at any time and from time to time.  The Holder shall effect conversions by delivering to the Company a Notice of Conversion, the form of which is attached hereto as Annex A (each, a "Notice of Conversion"), specifying therein the principal amount of this Debenture to be converted and the date on which such conversion shall be effected, which date shall be no earlier than the tenth (10) Business Day after such Notice of Conversion is deemed delivered hereunder (such date, the "Conversion Date").  If no Conversion Date is specified in a Notice of Conversion, the Conversion Date shall be the date that is the tenth (10) Business Day after such Notice of Conversion is deemed delivered hereunder.  Conversions hereunder shall have the effect of lowering the outstanding principal amount of this Debenture in an amount equal to the applicable amount being converted.  The Holder and the Company shall maintain records showing the principal amount(s) converted and the date of such conversion(s).  The Company may deliver an objection to any Notice of Conversion within three Business Days of delivery of such Notice of Conversion.  In the event of any dispute or discrepancy, the records of the Company shall be controlling and determinative in the absence of manifest error. The Holder, and any assignee by acceptance of this Debenture, acknowledge and agree that, by reason of the provisions of this paragraph, following conversion of a portion of this Debenture, the unpaid and unconverted principal amount of this Debenture may be less than the amount stated on the face hereof.

b)           Conversion Price.  The conversion price in effect on any Conversion Date shall be equal to $0.75, subject to adjustment herein (the "Conversion Price").

c)           Mechanics of Conversion.

i.           Conversion Shares Issuable Upon Conversion.  The number of Conversion Shares issuable upon a conversion hereunder shall be determined by the quotient obtained by dividing (x) the outstanding principal amount of this Debenture to be converted by (y) the Conversion Price.

ii.           Delivery of Certificate Upon Conversion. Not later than five Trading Days after each Conversion Date, the Company shall deliver, or cause to be delivered, to the Holder a certificate or certificates representing the number of Conversion Shares being acquired upon the conversion of this Debenture.

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iii.           Reservation of Shares Issuable Upon Conversion. The Company covenants that it will at all times reserve and keep available out of its authorized and unissued shares of Common Stock for the sole purpose of issuance upon conversion of this Debenture as herein provided, free from preemptive rights or any other actual contingent purchase rights of Persons other than the Holder (and the other holders of the Debentures), not less than such aggregate number of shares of the Common Stock as shall (subject to the terms and conditions set forth in the Purchase Agreement) be issuable (taking into account the adjustments of Section 5) upon the conversion of the then outstanding principal amount of this Debenture.  The Company covenants that all shares of Common Stock that shall be so issuable shall, upon issue, be duly authorized, validly issued, fully paid and nonassessable.

iv.           Fractional Shares. No fractional shares or scrip representing fractional shares shall be issued upon the conversion of this Debenture.  As to any fraction of a share which the Holder would otherwise be entitled to purchase upon such conversion, the Company shall at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Conversion Price or round up to the next whole share.

v.           Transfer Taxes.  The issuance of certificates for shares of the Common Stock on conversion of this Debenture shall be made without charge to the Holder hereof for any documentary stamp or similar taxes that may be payable in respect of the issue or delivery of such certificates; provided, however, that, the Company shall not be required to pay any tax that may be payable in respect of any transfer involved in the issuance and delivery of any such certificate upon conversion in a name other than that of the Holder and the Company shall not be required to issue or deliver such certificates unless or until the Person or Persons requesting the issuance thereof shall have paid to the Company the amount of such tax or shall have established to the satisfaction of the Company that such tax has been paid.

Section 5.             Certain Adjustments.

a)           Stock Dividends and Stock Splits.  If the Company, at any time while this Debenture is outstanding: (i) pays a stock dividend or otherwise makes a distribution or distributions payable in shares of Common Stock on shares of Common Stock, (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii) combines (including by way of a reverse stock split) outstanding shares of Common Stock into a smaller number of shares or (iv) issues, in the event of a reclassification of shares of the Common Stock, any shares of capital stock of the Company, then the Conversion Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock (excluding any treasury shares of the Company) outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event.  Any adjustment made pursuant to this Section 5(a) shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution and shall become effective immediately after the effective date in the case of a subdivision, combination or reclassification.

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b)           Calculations.  All calculations under this Section 5 shall be made to the nearest cent or the nearest 1/100th of a share, as the case may be.  For purposes of this Section 5, the number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be the number of shares of Common Stock (excluding any treasury shares of the Company) issued and outstanding.

c)           Notice to the Holder of Adjustment to Conversion Price.  Whenever the Conversion Price is adjusted pursuant to any provision of this Section 5, the Company shall promptly deliver to the Holder a notice setting forth the Conversion Price after such adjustment and setting forth a brief statement of the facts requiring such adjustment.

d)           Notice to Allow Conversion by Holder. If the approval of any stockholders of the Company shall be required in connection with any consolidation or merger to which the Company is a party, any sale or transfer of all or substantially all of the assets of the Company, of any compulsory share exchange whereby the Common Stock is converted into other securities, cash or property, then, the Company shall cause to be delivered to the Holder at its last address as it shall appear upon the Debenture Register, at least 15 calendar days prior to the applicable effective date hereinafter specified, a notice stating the date on which such consolidation, merger, sale, transfer or share exchange is expected to become effective or close, and the date as of which it is expected that holders of the Common Stock of record shall be entitled to exchange their shares of the Common Stock for securities, cash or other property deliverable upon such consolidation, merger, sale, transfer or share exchange, provided that the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the corporate action required to be specified in such notice. The Holder is entitled to convert this Debenture in accordance with the terms of this Debenture during the 15-day period commencing on the date of such notice through the effective date of the event triggering such notice.

Section 6.             Redemption and Forced Conversion.

a)           Optional Redemption at Election of Company.  Subject to the provisions of this Section 6(a), at any time after Original Issue Date, the Company may deliver a notice to the Holder (an "Optional Redemption Notice" and the date such notice is deemed delivered hereunder, the "Optional Redemption Notice Date") of the Company's election to redeem all or a portion of the then outstanding principal amount of this Debenture for cash in an amount equal to the outstanding principal amount of this Debenture then being redeemed plus accrued and unpaid interest on such amount (the "Optional Redemption Amount") on the 10thTrading Day following the Optional Redemption Notice Date (such date, the "Optional Redemption Date", and such redemption, the "Optional Redemption"). The Optional Redemption Amount shall be paid in full to the Holder on the Optional Redemption Date. The Company covenants and agrees that it will honor all Notices of Conversion tendered from the time of delivery of the Optional Redemption Notice through the date all amounts owing thereon are due and paid in full. The Company's determination to effect an Optional Redemption shall be applied ratably to all of the holders of the then outstanding Debentures based on their (or their predecessor's) initial purchases of Debentures pursuant to the Purchase Agreement.

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b)           Forced Conversion.  Notwithstanding anything herein to the contrary, if after the Original Issue Date, either (i) the closing price of the Common Stock as reported on the Trading Market for any 20 Trading Days in any 30 consecutive Trading Day Period, which 30 Trading Day period shall have commenced only after the Original Issue Date (such 30 Trading Day period, the “Threshold Period”), exceeds 200% of the then-applicable Conversion Price (subject to adjustment for reverse and forward stock splits, stock dividends, stock combinations and other similar transactions of the Common Stock that occur after the Original Issue Date) or (ii) the average daily trading volume for the Common Stock on the principal Trading Market exceeds 100,000 shares per Trading Day for any 20 Trading Days in any Period and the closing price of the Common Stock as reported on the Trading Market for any 20 Trading Days in any Threshold Period exceeds 100% of the then-applicable Conversion Price (subject to adjustment for reverse and forward stock splits, stock dividends, stock combinations and other similar transactions of the Common Stock that occur after the Original Issue Date), the Company may, within five Trading Days after the end of any such Threshold Period, deliver a written notice to the Holder (a “Forced Conversion Notice” and the date such notice is delivered to the Holder, the “Forced Conversion Notice Date”) to cause the Holder to convert all or part of the then outstanding principal amount of this Debenture plus, if so specified in the Forced Conversion Notice, accrued but unpaid interest and other amounts owing to the Holder under this Debenture, it being agreed that the “Conversion Date” for purposes of Section 6(b) shall be deemed to occur on the third Trading Day following the Forced Conversion Notice Date.  Any conversion effected pursuant to this Section 6(b) shall be applied ratably to all holders based on their initial purchases of Debentures pursuant to the Purchase Agreement, provided that any voluntary conversions by a Holder shall be applied against such Holder’s pro rata allocation, thereby decreasing the aggregate amount forcibly converted hereunder if only a portion of this Debenture is forcibly converted.

Section 7.             Negative Covenants. As long as any portion of this Debenture remains outstanding, unless the holders of at least two-thirds of the principal amount of the then outstanding Debentures shall have otherwise given prior written consent, the Company shall not pay cash dividends or distributions on any equity securities of the Company.

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Section 8.             Miscellaneous.

a)           Notices.  Any and all notices or other communications or deliveries to be provided by the Holder hereunder, including, without limitation, any Notice of Conversion, shall be in writing and delivered personally, by facsimile to the facsimile number of the Company set forth on the signature page hereof, or sent by a nationally recognized overnight courier service addressed to the Company at the address set forth above, or such other facsimile number or address as the Company may specify for such purposes by notice to the Holder delivered in accordance with this Section 8(a).  Any and all notices or other communications or deliveries to be provided by the Company hereunder shall be in writing and delivered personally, by facsimile, or sent by a nationally recognized overnight courier service addressed to each Holder at the facsimile number or address of the Holder appearing on the books of the Company, or if no such facsimile number or address appears on the books of the Company, at the principal place of business of such Holder, as set forth in the Purchase Agreement.  Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number set forth on the signature pages attached hereto prior to 5:30 p.m. (Pacific time) on any date, (ii) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number set forth on the signature pages attached hereto on a day that is not a Trading Day or later than 5:30 p.m. (Pacific time) on any Trading Day, (iii) the second Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service or (iv) upon actual receipt by the party to whom such notice is required to be given.

b)           Pari Passu. This Debenture ranks pari passu with all other Debentures now or hereafter issued under the terms set forth herein.

c)           Lost or Mutilated Debenture.  If this Debenture shall be mutilated, lost, stolen or destroyed, the Company shall execute and deliver, in exchange and substitution for and upon cancellation of a mutilated Debenture, or in lieu of or in substitution for a lost, stolen or destroyed Debenture, a new Debenture for the principal amount of this Debenture so mutilated, lost, stolen or destroyed, but only upon receipt of an affidavit and indemnity agreement from the Holder and evidence of such loss, theft or destruction of such Debenture, and of the ownership hereof, in each case, reasonably satisfactory to the Company.

d)           Governing Law.  All questions concerning the construction, validity, enforcement and interpretation of this Debenture shall be governed by and construed and enforced in accordance with the internal laws of the State of California, without regard to the principles of conflict of laws thereof.  Each party agrees that all legal proceedings concerning the interpretation, enforcement and defense of the transactions contemplated by any of the Transaction Documents (whether brought against a party hereto or its respective directors, officers, shareholders, employees or agents) shall be commenced in the state and federal courts sitting in the City of San Diego in the State of California (the "California Courts").  Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the California Courts for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transaction Documents), and hereby irrevocably waives, and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of such California Courts, or such California Courts are improper or inconvenient venue for such proceeding.  Each party hereby irrevocably waives personal service of process and consents to process being served in any such suit, action or proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Debenture and agrees that such service shall constitute good and sufficient service of process and notice thereof.  Nothing contained herein shall be deemed to limit in any way any right to serve process in any other manner permitted by applicable law. Each party hereto hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Debenture or the transactions contemplated hereby. If any party shall commence an action or proceeding to enforce any provisions of this Debenture, then the prevailing party in such action or proceeding shall be reimbursed by the other party for its attorneys fees and other costs and expenses incurred in the investigation, preparation and prosecution of such action or proceeding.

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e)           Waiver.  Any waiver by the Company or the Holder of a breach of any provision of this Debenture shall not operate as or be construed to be a waiver of any other breach of such provision or of any breach of any other provision of this Debenture.  The failure of the Company or the Holder to insist upon strict adherence to any term of this Debenture on one or more occasions shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Debenture on any other occasion.  Any waiver by the Company or the Holder must be in writing.

f)           Severability.  If any provision of this Debenture is invalid, illegal or unenforceable, the balance of this Debenture shall remain in effect, and if any provision is inapplicable to any Person or circumstance, it shall nevertheless remain applicable to all other Persons and circumstances.  If it shall be found that any interest or other amount deemed interest due hereunder violates the applicable law governing usury, the applicable rate of interest due hereunder shall automatically be lowered to equal the maximum rate of interest permitted under applicable law. The Company covenants (to the extent that it may lawfully do so) that it shall not at any time insist upon, plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay, extension or usury law or other law which would prohibit or forgive the Company from paying all or any portion of the principal of or interest on this Debenture as contemplated herein, wherever enacted, now or at any time hereafter in force, or which may affect the covenants or the performance of this indenture, and the Company (to the extent it may lawfully do so) hereby expressly waives all benefits or advantage of any such law, and covenants that it will not, by resort to any such law, hinder, delay or impede the execution of any power herein granted to the Holder, but will suffer and permit the execution of every such as though no such law has been enacted.

g)           Next Business Day.  Whenever any payment or other obligation hereunder shall be due on a day other than a Business Day, such payment shall be made on the next succeeding Business Day.

h)           Headings.  The headings contained herein are for convenience only, do not constitute a part of this Debenture and shall not be deemed to limit or affect any of the provisions hereof.

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i)           Amendments.  This Debenture may be modified or amended or the provisions hereof waived with the prior written consent of the Company and holders holding Debentures at least equal to a majority of the aggregate principal amount then outstanding under all Debentures.

j)           Secured Obligations.  The obligations of the Company under this Debenture shall be secured by all of the assets of the Company in accordance with the provisions of a security agreement among the Company and the original holders of Debentures, as amended, modified or supplemented from time to time in accordance with its terms.

*********************

(Signature Pages Follow)

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IN WITNESS WHEREOF, the Company has caused this Debenture to be duly executed by a duly authorized officer as of the date first above indicated.

MITEK SYSTEMS, INC.
By:
	Name:
	Title:
Facsimile No. for delivery of Notices:

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ANNEX A

NOTICE OF CONVERSION

The undersigned hereby elects to convert principal under the 5% Secured Convertible Debenture due December 10, 2011 of Mitek Systems, Inc., a Delaware corporation (the "Company"), into shares of common stock (the "Common Stock"), of the Company according to the conditions hereof, as of the date written below.  If shares of Common Stock are to be issued in the name of a person other than the undersigned, the undersigned will pay all transfer taxes payable with respect thereto and is delivering herewith such certificates and opinions as reasonably requested by the Company in accordance therewith.  No fee will be charged to the holder for any conversion, except for such transfer taxes, if any.

(Complete each line below)

(1)	Conversion Date:
(2)	Principal Amount of Debenture to be Converted:
(3)	Conversion Price:	$
(4)	Number of Conversion Shares to be Issued:
(5)	Principal Amount of Debenture After Conversion:
(6)	Address for Delivery of Conversion Shares:

	Holder:
Signature:
Printed Name:
Title (if applicable):

Schedule 1

CONVERSION SCHEDULE

The 5% Secured Convertible Debentures due on _________ __, 2011 in the aggregate principal amount of $____________ are issued by Mitek Systems, Inc., a Delaware corporation.  This Conversion Schedule reflects conversions made under Section 4 of the above referenced Debenture.

Date of Conversion Amount of Conversion Aggregate Principal Amount Remaining Subsequent to Conversion Company Attest