UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q
(Mark One)

[X]   QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

                For the quarterly period ended February 28, 2011

[  ]  TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

                 For the transition period from _____ to _______

                          Commission File Number: None

                      Security Devices International, Inc.
             (Exact Name of Registrant as Specified in its Charter)

                     Delaware                         71-1050654
          ------------------------------          --------------------
         (State or other jurisdiction of           (I.R.S. Employer
          incorporation or organization)          Identification No.)

                      1101 Pennsylvania Ave., NW, 6th Floor
                              Washington, DC 20004
                   ------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)

        Registrant's telephone number including area code: (416) 787-1871

                                       N/A
             ------------------------------------------------------
         Former name, former address, and former fiscal year, if changed
                                since last report

Indicate by check mark whether the registrant (1) filed all reports required to
be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the past 12 months (or for such shorter period that the registrant was required
to file such reports), and (2) has been subject to such filing requirements for
the past 90 days. Yes [X] No [ ]

Indicate by check mark whether the registrant is a large accelerated filer, an
accelerated filer, a non-accelerated filer, or a smaller reporting company. See
definition of "large accelerated filer", "accelerated filer" and "smaller
reporting company" in Rule 12b-2 of the Exchange Act.

Larger accelerated filer [  ]           Accelerated filer [  ]
Non-accelerated filer [  ]              Smaller reporting company [X]

Indicate by check mark whether registrant is a shell company (as defined in Rule
12b-2 of the Exchange Act).
Yes [  ]       No  [X]

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date: 25,878,050 shares outstanding
as of April 12, 2010.




                      SECURITY DEVICES INTERNATIONAL, INC.
                        (A Development Stage Enterprise)
                          INTERIM FINANCIAL STATEMENTS
                                FEBRUARY 28, 2011
                        (Amounts expressed in US Dollars)
                                   (Unaudited)










                      SECURITY DEVICES INTERNATIONAL, INC.
                        (A Development Stage Enterprise)
                          INTERIM FINANCIAL STATEMENTS
                                FEBRUARY 28, 2011
                        (Amounts expressed in US Dollars)
                                   (Unaudited)


                                TABLE OF CONTENTS
                                       Page No

Interim Balance Sheets as at February 28, 2011 and November 30, 2010         1

Interim Statement of Operations for the three months ended February 28,
2011 and February 28, 2010                                                   2

Interim Statement of Cash Flows for the three months ended February 28,
2011 and February 28, 2010                                                   3

Interim Statements of changes in Stockholders' Deficit for the three
months ended February 28, 2011 and for the period from inception
(March 1, 2005) to November 30, 2010                                         4

Condensed Notes to Interim Financial Statements                           5-16









                                        4




SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Interim Balance Sheets
As at February 28, 2011 and November 30, 2010
(Amounts expressed in US Dollars)

                                                     February 28,   November 30,
                                                         2011         2010
                                                      (unaudited)   (audited)
                                      ASSETS               $             $

CURRENT
   Cash                                                     71,570      247,328
   Prepaid expenses and other                               16,953       38,419
                                                        ----------   ----------

Total Current Assets                                        88,523      285,747
Plant and Equipment, net (Note 4)                           26,504       29,200
                                                        ----------   ----------

TOTAL ASSETS                                               115,027      314,947
                                                        ----------   ----------

                                   LIABILITIES

CURRENT LIABILITIES
Accounts payable and accrued liabilities                   767,098      787,641
                                                        ----------   ----------

Total Current Liabilities                                  767,098      787,641
                                                        ----------   ----------

Going Concern (note 2)

Related Party Transactions (note 8)

Commitments (note 9)

Subsequent Events (note 10)

                              STOCKHOLDERS' DEFICIT

Capital Stock (Note 5)
Preferred stock, $0.001 par value, 5,000,000
  shares authorized, Nil issued and
  outstanding (2009 - nil)
Common stock, $0.001 par value 50,000,000
  shares authorized, 25,878,050 issued
  and outstanding (2010 -25,878,050)                        25,878       25,878
Additional Paid-In Capital                              16,026,078   15,876,078
Deficit Accumulated During the Development
  Stage                                                (16,704,027) (16,374,650)
                                                        ----------   ----------

Total Stockholders' Deficit                               (652,071)    (472,694)
                                                        ----------   ----------

TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT                115,027      314,947
                                                        ----------   ----------


            See condensed notes to the interim financial statements.



                                       1


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Statements of Operations
For the Three Months Ended February 28, 2011 and February 28, 2010
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)


                                                                            

                                                                    For the       For the
                                                   Cumulative     three months  three months
                                                 since inception     ended         ended
                                                 (March 1, 2005)  February 28,  February 28,
                                                                     2011           2010
                                                         $             $              $

     OPERATING EXPENSES:

     Research and Product Development Cost            7,652,784       159,809      271,213
     Amortization                                        32,269         2,696        1,978
     General and Administration                       9,291,568       166,872      273,083
                                                    -----------    ----------    ---------
     TOTAL OPERATING EXPENSES                        16,976,621       329,377      546,274
                                                    -----------    ----------    ---------
     LOSS FROM OPERATIONS                           (16,976,621)     (329,377)    (546,274)

        Other Income-Interest                           272,594             -            -
                                                    -----------    ----------    ---------
     LOSS BEFORE INCOME TAXES                       (16,704,027)     (329,377)    (546,274)

     Income taxes                                             -             -            -
                                                    -----------    ----------    ---------
     NET LOSS AND COMPREHENSIVE LOSS                (16,704,027)     (329,377)    (546,274)

     Loss per share - basic and diluted                                 (0.01)       (0.03)
                                                                   ----------    ---------
     Weighted average common shares outstanding                    25,878,050   16,174,606


            See condensed notes to the interim financial statements.

                                       2



SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Interim Statement of Cash Flows
For the Three Months Ended February 28, 2011 and February 28, 2010
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)


                                                                      

                                                                For the       For the
                                                             three months  three months
                                               Cumulative       ended          ended
                                            since inception  February 28,  February 28,
                                          (March 1, 2005)        2011          2010
                                                  $                $             $

CASH FLOWS FROM OPERATING ACTIVITIES
  Net loss for the period                        (16,704,027)     (329,377)   (546,540)
    Items not requiring an outlay of cash:
      Issue of shares for  services                  584,500             -           -
      Stock based compensation for options and
       warrants (included in general  and
       administration expenses)                    5,556,406             -      93,493
      Loss on cancellation of common stock            34,400             -           -
      Amortization                                    32,269         2,696       2,244
      Changes in non-cash working capital:
      Prepaid expenses and other                     (16,953)       21,466       3,644
      Accounts payable and accrued liabilities       767,098       (20,543)     85,801
                                                 ------------    ----------   ---------

NET CASH USED IN OPERATING ACTIVITIES             (9,746,307)     (325,758)   (361,358)
                                                 ------------    ----------   ---------

CASH FLOWS FROM INVESTING ACTIVITIES
  Acquisition of Plant and Equipment                 (58,773)            -           -
                                                 ------------    ----------   ---------

NET CASH USED IN INVESTING ACTIVITIES                (58,773)            -           -
                                                 ------------    ----------   ---------

CASH FLOWS FROM FINANCING ACTIVITIES
  Stock subscriptions received                       180,000       150,000
  Net proceeds from issuance of common shares      9,629,150             -     357,500
  Cancellation of common stock                       (50,000)            -           -
  Exercise of stock options                          117,500             -           -
                                                 ------------    ----------   ---------

NET CASH PROVIDED BY FINANCING ACTIVITIES          9,876,650       150,000     357,500
                                                 ------------    ----------   ---------

NET INCREASE (DECREASE) IN CASH FOR THE PERIOD        71,570      (175,758)     (3,858)
  Cash, beginning of period                                -       247,328      55,431
                                                 ------------    ----------   ---------

CASH, END OF PERIOD                                   71,570        71,570      51,573
                                                 ============    ==========   =========

INCOME TAXES PAID                                          -             -           -
                                                 ============    ==========   =========

INTEREST PAID                                              -             -           -
                                                 ============    ==========   =========



        See condensed notes to the interim financial statements

                                       3


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise) Interim Statement of Changes in Stockholders'
Equity Three months ended February 28, 2011 and for Period from Inception (March
1, 2005) to November 30, 2010.
(Amounts expressed in US Dollars)
(Amounts expressed in US Dollars)


                                                                             
                                                                           Deficit
                                     Number of      Common   Additional   Accumulated
                                       Common       Shares    Paid-in       During
                                       Shares       amount    Capital   Development Stage  Total
                                       ------       ------    -------   -----------------  -----
                                          $            $         $             $             $
Balance as of March 1, 2005                   -           -           -            -            -
Issuance of Common shares
 for professional services            6,525,000       6,525      58,725            -       65,250
Issuance of common shares for cash      397,880         398      99,072                    99,470
Net loss for the period                       -           -           -     (188,699)    (188,699)
                                     ----------     -------   ---------  -----------   ----------
Balance as of November 30, 2005       6,922,880       6,923     157,797     (188,699)     (23,979)
                                     ----------     -------   ---------  -----------   ----------
Issuance of common shares for cash      956,000         956      94,644            -       95,600
Issuance of common shares for cash      286,000         286      49,764            -       50,050
Issuance of common shares  to
 consultant for services                 50,000          50       8,700            -        8,750
Issuance of common shares for cash    2,000,000       2,000     398,000            -      400,000
Exercise of stock options               950,000         950      94,050            -       95,000
Issuance of common shares for cash
 (net of agent commission)              200,000         200     179,785            -      179,985
Stock subscriptions received                                  1,165,500            -    1,165,500
Stock based compensation                      -           -   1,049,940            -    1,049,940
Net loss for the year                        --           -          --   (1,660,799)  (1,660,799)
                                     ----------     -------   ---------  -----------   ----------
Balance as of November 30, 2006      11,364,880      11,365   3,198,180   (1,849,498)   1,360,047

Issuance of common shares for stock

Subscriptions received in prior year  1,165,500       1,165      (1,165)           -            -
Issuance of common shares for cash    1,170,670       1,171   1,169,499                 1,170,670
Issuance of common shares for cash
 and services                            50,000          50     154,950                   155,000
Issuance of common shares for cash
 (net of expenses)                    2,139,000       2,139   4,531,236                 4,533,375
Cancellation of stock                (1,560,000)     (1,560)    (14,040)                  (15,600)
Stock based compensation                                      2,446,433                 2,446,433
Issue of warrants                                               357,094                   357,094
Net loss for the year                         -           -           -   (4,827,937)  (4,827,937)
                                     ----------     -------   ---------  -----------   ----------
Balance as of November 30, 2007      14,330,050      14,330  11,842,187   (6,677,435)   5,179,082

Exercise of stock options               117,000         117      11,583                    11,700
Stock based compensation                      -           -   1,231,056            -    1,231,056
Net loss for the year                         -           -           -   (4,401,786)  (4,401,786)
                                     ----------     -------   ---------  -----------   ----------
Balance as of November 30, 2008      14,447,050      14,447  13,084,826  (11,079,221)   2,020,052

Issuance of common shares for cash      788,000         788     196,212                   197,000
Stock based compensation                      -           -     177,990            -      177,990
Compensation expense for warrants                                 4,223                     4,223
Net loss for the year                         -           -           -   (2,974,467)  (2,974,467)
                                     ----------     -------   ---------  -----------   ----------
Balance as of November 30, 2009      15,235,050      15,235  13,463,251  (14,053,688)    (575,202)

Issuance of common shares for cash    8,143,000       8,143   1,665,157                 1,673,300
Issuance of common shares
For services                          2,500,000       2,500     428,000                   430,500
Stock subscriptions received                                     30,000                    30,000
Stock based compensation                                        289,670                   289,670
Net loss for the year                                                     (2,320,962)  (2,320,962)
                                     ----------     -------   ---------  -----------   ----------
Balance as of November 30, 2010      25,878,050      25,878  15,876,078  (16,374,650)    (472,694)

Stock subscriptions received                                    150,000                   150,000
Net loss for the period                                                     (329,377)    (329,377)
                                     ----------     -------   ---------  -----------   ----------
Balance as of February 28, 2011      25,878,050      25,878  16,026,078  (16,704,027)    (652,071)



             See condensed notes to the interim financial statements

                                       4


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

1.    BASIS OF PRESENTATION

     The  accompanying   unaudited  condensed  financial  statements  have  been
     prepared in accordance with the  instructions to Form 10-Q and therefore do
     not include all information and footnotes necessary for a fair presentation
     of financial  position,  results of operations and cash flows in conformity
     with U.S. generally accepted accounting  principles (GAAP);  however,  such
     information reflects all adjustments (consisting solely of normal recurring
     adjustments), which are, in the opinion of management, necessary for a fair
     statement of the results for the interim periods.

     The condensed  financial  statements should be read in conjunction with the
     financial   statements  and  Notes  thereto   together  with   management's
     discussion  and analysis of financial  condition  and results of operations
     contained in the  Company's  annual  report on Form 10-K for the year ended
     November 30, 2010. In the opinion of management, the accompanying condensed
     financial  statements  reflect all adjustments of a normal recurring nature
     considered  necessary to fairly state the financial position of the Company
     at February 28, 2011 and November 30, 2010,  the results of its  operations
     for the three-month  periods ended February 28, 2011 and February 28, 2010,
     and its cash flows for the three-month  periods ended February 28, 2011 and
     February 28, 2010. In addition,  some of the  Company's  statements in this
     quarterly report on Form 10-Q may be considered forward-looking and involve
     risks and uncertainties that could  significantly  impact expected results.
     The results of operations  for the  three-month  period ended  February 28,
     2011 are not necessarily  indicative of results to be expected for the full
     year.

     The  Company  was  incorporated  under the laws of the state of Delaware on
     March 1, 2005.

2.   NATURE OF OPERATIONS AND GOING CONCERN

     The  Company  is a  defense  technology  corporation  specializing  in  the
     development of innovative  next generation  less-than-lethal  solutions for
     security  situations  that do not  require  the  use of  deadly  force,  or
     ammunition.  SDI is  currently  developing  manufacturing  partnerships  to
     assist in the deployment of their patent pending family of products.  These
     products  consist of; the Blunt Impact  Projectile  40mm  (BIP40),  and the
     Wireless Electric Projectile 40mm (WEP40).

     These financial  statements have been prepared in accordance with generally
     accepted accounting principles applicable to a going concern, which assumes
     that the Company  will be able to meet its  obligations  and  continue  its
     operations for its next fiscal year.

                                       5


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

2. NATURE OF OPERATIONS AND GOING CONCERN-Cont'd

     At  February  28,  2011,  the  Company  has  not  yet  achieved  profitable
     operations,   had  a  working  capital   deficiency  of  $678,575  and  has
     accumulated  losses of  $16,704,027  since  inception  and expects to incur
     further losses in the development of its business,  all of which limits the
     Company's  ability to continue as a going  concern.  The Company has a need
     for additional working capital to launch its blunt impact and electric 40mm
     round products, meet its ongoing levels of corporate overhead and discharge
     its liabilities as they come due.

     In order to  finance  the  continued  development,  the  Company is working
     towards raising of appropriate capital in the near future.  During the year
     ended  November 30, 2009,  the Company  raised  $197,000  through  issue of
     common  shares and  warrants.  The  Company  further  raised an  additional
     $1,673,300  net  through  the issue of  8,143,000  common  shares  and also
     received $30,000  subscription for shares pending allotment during the year
     ended  November  30,  2010.  The Company  further  received  an  additional
     $150,000  subscription for shares pending  allotment during the three month
     period ended February 28, 2011.

     While the Company has been  successful in securing  financings in the past,
     there  is no  assurance  that  it  will  be  able  to do so in the  future.
     Accordingly,  these financial statements do not give effect to adjustments,
     if any, that would be necessary should the Company be unable to continue as
     a going concern

     The Company has incurred a loss of $ 329,377  during the three month period
     ended  February 28, 2011  primarily  due to its  research  and  development
     activities.  At February 28, 2011, the Company had an  accumulated  deficit
     during the  development  stage of  $16,704,027  which  includes a non- cash
     stock based  compensation  expense of  $5,556,406  for issue of options and
     warrants.

3.   RESEARCH AND PRODUCT DEVELOPMENT

     Research and Product  Development  costs,  including  acquired research and
     product  development  costs,  are  charged  against  income  in the  period
     incurred.

                                       6


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)


4.   PLANT AND EQUIPMENT, NET

     Plant and  equipment  are recorded at cost less  accumulated  depreciation.
     Depreciation  is provided  commencing  in the month  following  acquisition
     using the following annual rate and method:

            Computer equipment          30%   declining balance method
            Furniture and Fixtures      30%   declining balance method
            Leasehold Improvements            straight line over period of lease

                                   February 28, 2011         November 30, 2010
                                   -----------------         -----------------
                                           Accumulated             Accumulated
                                  Cost    Amortization      Cost  Amortization
                                    $          $              $         $

        Computer equipment      35,211       21,550        35,211     20,442
        Furniture and fixtures  15,310        9,594        15,310      9,131
        Leasehold Improvements   8,252        1,125         8,252          -
                                ------       ------        ------     ------
                                58,773       32,269        58,773     29,573
                                ------       ------        -------    -------

        Net carrying amount           $26,504                  $29,200
                                      -------                  -------


5. CAPITAL STOCK

     a) Authorized

            50,000,000 Common shares, $0.001 par value

     And

            5,000,000 Preferred shares, $0.001 par value

     The Company's Articles of Incorporation authorize its Board of Directors to
     issue up to 5,000,000  shares of preferred  stock.  The  provisions  in the
     Articles  of  Incorporation  relating  to the  preferred  stock  allow  the
     directors  to issue  preferred  stock  with  multiple  votes  per share and
     dividend  rights which would have  priority  over any  dividends  paid with
     respect to the holders of SDI's common stock.

                                       7


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

5. CAPITAL STOCK-Cont'd

     b) Issued

           25,878,050 Common shares

     c)  Changes to Issued Share Capital

     Year ended November 30, 2010

     On January 4, 2010 the Company completed the placement for 1,510,000 common
     shares to private  investors.  The shares were sold at a price of $0.25 per
     common  share for a total  consideration  of  $377,500.  The  Company  paid
     $20,000  as  finder's  fees.  The  shares  of common  stock are  restricted
     securities,  as that  term is  defined  in Rule 144 of the  Securities  and
     Exchange  Commission.  The Company  relied upon the  exemption  provided by
     Section 4(2) of the Securities Act of 1933 in this connection.

     In May, 2010, the Company received $10,800 being the exercise of options to
     acquire  108,000  common  shares at an  exercise  price of $0.10 per common
     share.  The Company  issued  108,000 common shares during the quarter ended
     August 31, 2010.

     On June 1, 2010 the  Company  sold  1,000,000  shares of common  stock to a
     private  investor at a price of $0.20 per share. The shares of common stock
     are  restricted  securities,  as that  term is  defined  in Rule 144 of the
     Securities and Exchange  Commission.  The Company relied upon the exemption
     provided by Section 4(2) of the Securities  Act of 1933 in connection  with
     the sale of these securities.

     In June 9, 2010 the  Company  sold  650,000  shares of common  stock to two
     private  investors at a price of $0.20 per share.  The Company  relied upon
     the  exemption  provided by Section 4(2) of the  Securities  Act of 1933 in
     connection  with the sale of these shares.  The shares sold are  restricted
     securities,  as that  term is  defined  in Rule 144 of the  Securities  and
     Exchange Commission.

     On August 31, 2010 the Company  sold  700,000  shares of common  stock to a
     private  investor at a price of $0.20 per share. The shares of common stock
     are  restricted  securities,  as that  term is  defined  in Rule 144 of the
     Securities and Exchange  Commission.  The Company relied upon the exemption
     provided by Section 4(2) of the Securities  Act of 1933 in connection  with
     the sale of these securities.

                                       8


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

5. CAPITAL STOCK-Cont'd

     On September 22, 2010 the Company sold 2,250,000  shares of common stock to
     private investors at a price of $0.20 per share. The shares of common stock
     are  restricted  securities,  as that  term is  defined  in Rule 144 of the
     Securities and Exchange  Commission.  The Company relied upon the exemption
     provided by Section 4(2) of the Securities  Act of 1933 in connection  with
     the sale of these securities.

     On October 18, 2010 the Company  sold  1,925,000  shares of common stock to
     private investors at a price of $0.20 per share. The shares of common stock
     are  restricted  securities,  as that  term is  defined  in Rule 144 of the
     Securities and Exchange  Commission.  The Company relied upon the exemption
     provided by Section 4(2) of the Securities  Act of 1933 in connection  with
     the sale of these securities.

     On October 18, 2010 the Company issued 2,500,000 shares of common stock for
     services  which  includes  550,000  common  shares  issued to directors for
     settlement of debt and  cancellation of options and 1,800,000 common shares
     for services provided by an outside Company which is owned by an officer of
     this Company.

     Three months ended February 28, 2011

     The Company received  subscriptions  for 750,000 common shares at $0.20 per
     share. The Company has not issued any shares during this period.

6. STOCK BASED COMPENSATION

     Year ended November 30, 2010

     On December 4, 2009,  the Company  approved  the  reduction of the exercise
     price of 300,000  outstanding  options  which had earlier  been issued at a
     price of $0.50 to a new  option  price of $0.25 per  share,  with all other
     terms of the original grant  remaining the same. The Company  expensed this
     additional  non-cash  stock  based  compensation  expense  relating to this
     modification for $6,534. The fair value of each option used for the purpose
     of estimating the stock  compensation is calculated using the Black-Scholes
     option pricing model with the following weighted average assumptions:

          Risk free rate                                              2.61%
          Expected dividends                                             0%
          Forfeiture rate                                                0%
          Volatility                                                173.24%
          Exercise price                                             $0.25
          Increase in fair value due to reduction in exercise
           price of options                                          $0.02

                                       9


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)


6. STOCK BASED COMPENSATION-Cont'd

          Market price of Company's common stock on date of
           reduction in exercise price                              $0.25
          Stock-based compensation cost expensed                   $6,534

     On December 4, 2009,  the Company  approved the extension of the expiration
     of 2,900,000  outstanding  options from their  initial  expiry date ranging
     from November 2011 to April 2013 to a new expiration  date of June 30, 2014
     with all other terms of the original grant  remaining the same. The Company
     expensed this additional non-cash stock based compensation expense relating
     to this  modification  for $63,282.  The fair value of each option used for
     the purpose of estimating the stock  compensation  is calculated  using the
     Black-Scholes  option  pricing  model with the following  weighted  average
     assumptions:

            Risk free rate                                            2.61%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              173.24%
            Stock-based compensation cost expensed                 $63,282

     On January 4, 2010, the board of directors granted options to a director to
     acquire 100,000 common shares at an exercise price of $0.25 per share.  All
     of these options vested  immediately and have an expiry of five years.  The
     Company expensed stock based  compensation cost of $23,677.  The fair value
     of each option used for the purpose of estimating the stock compensation is
     calculated using the Black-Scholes  option pricing model with the following
     weighted average assumptions:

            Risk free rate                                            2.61%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              170.69%
            Market price of Company's common stock on date
             of grant of options                                     $0.25
            Stock-based compensation cost expensed                 $23,677

     On May 20, 2010,  the Company  approved the extension of the  expiration of
     50,000 outstanding options from their initial expiry date from May 21, 2010
     to a new  expiration  date of June 30, 2014 and a reduction in the exercise
     price  of the  options  from  $0.50 to $0.25  with all  other  terms of the
     original  grant  remaining the same. The Company  expensed this  additional
     non-cash stock based compensation expense relating to this modification for
     $13,326.  The fair value of each option used for the purpose of  estimating
     the stock compensation is calculated using the Black-Scholes option pricing
     model with the following weighted average assumptions:

                                       10


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

6. STOCK BASED COMPENSATION-Cont'd

            Risk free rate                                            2.61%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              166.16%
            Stock-based compensation cost expensed                 $13,326

     On June 15, 2010, the board of directors  granted  options to a director to
     acquire  350,000  common  shares,  two  directors to acquire  50,000 common
     shares each and to a consultant to acquire 35,000 common shares.  All these
     485,000  options  were issued at an  exercise  price of $0.20 per share and
     vest  immediately  with an expiry term of five years.  The Company expensed
     stock based  compensation  cost of $119,368.  The fair value of each option
     used for the purpose of  estimating  the stock  compensation  is calculated
     using the  Black-Scholes  option pricing model with the following  weighted
     average assumptions:

            Risk free rate                                            2.61%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              164.99%
            Market price of Company's common stock on date
             of grant of options                                     $0.26
            Stock-based compensation cost expensed                $119,368

     On  September  30,  2010,  the board of  directors  granted  options to two
     directors to acquire 50,000 common shares each.  All these 100,000  options
     were  issued at an exercise  price of $0.20 per share and vest  immediately
     with an  expiry  term of five  years.  The  Company  expensed  stock  based
     compensation  cost of  $25,271.  The fair value of each option used for the
     purpose  of  estimating  the stock  compensation  is  calculated  using the
     Black-Scholes  option  pricing  model with the following  weighted  average
     assumptions:

            Risk free rate                                            2.61%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              189.45%
            Market price of Company's common stock on date
             of grant of options                                     $0.26
            Stock-based compensation cost expensed                 $25,271

     On  October  1,  2010,  the Board  cancelled  725,000  options  issued to a
     director  having an  exercise  price of $0.25 per  share  and  expiring  on
     various  dates  ranging from October 29, 2011 to January 4, 2015 and issued
     warrants to acquire  397,000  common shares  exercisable at $0.20 per share
     with an  expiry  term of five  years  and  500,000  common  shares  in lieu
     thereof. All outstanding

                                       11


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

6. STOCK BASED COMPENSATION-Cont'd

     payables to the said director for services  provided were adjusted  against
     the said issuance of common shares.  The Company  expensed this  additional
     non-cash stock based compensation expense relating to this modification for
     $31,097.  The fair value of each option used for the purpose of  estimating
     the stock compensation is calculated using the Black-Scholes option pricing
     model with the following weighted average assumptions:

            Risk free rate                                            3.25%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              189.42%
            Stock-based compensation cost expensed                 $31,097

     On  October  1,  2010,  the Board  cancelled  400,000  options  issued to a
     director  having an  exercise  price of $0.25 per  share  and  expiring  on
     various  dates  ranging  from  October 29, 2011 to June 30, 2014 and issued
     warrants to acquire  50,000  common shares  exercisable  at $0.20 per share
     with an expiry term of five years and 50,000 common shares in lieu thereof.
     All  outstanding  payables to the said director for services  provided were
     adjusted against the said issuance of common shares.  The Company concluded
     that there was no  additional  non-cash  stock based  compensation  expense
     relating to this  modification.  The fair value of each option used for the
     purpose  of  estimating  the stock  compensation  is  calculated  using the
     Black-Scholes  option  pricing  model with the following  weighted  average
     assumptions:

            Risk free rate                                            3.25%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              189.42%
            Stock-based compensation cost expensed                    $Nil

     On  October 1,  2010,  the Board  cancelled  175,000  options  issued to an
     officer  having an exercise  price of $0.25 per share and  expiring on June
     30, 2014 and issued warrants to acquire  175,000 common shares  exercisable
     at $0.20 per share with an expiry term of five years.  The Company expensed
     this additional non-cash stock based compensation  expense relating to this
     modification for $1,607. The fair value of each option used for the purpose
     of estimating the stock  compensation is calculated using the Black-Scholes
     option pricing model with the following weighted average assumptions:

            Risk free rate                                            3.25%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              189.42%
            Stock-based compensation cost expensed                  $1,607

                                       12


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

6. STOCK BASED COMPENSATION-Cont'd

     On October 1, 2010, the Board cancelled 300,000 options each for a total of
     600,000 options issued to two consultants having an exercise price of $0.25
     per share and  expiring  on June 30,  2014 and issued  warrants  to each to
     acquire 300,000 common shares exercisable at $0.20 per share for a total of
     600,000  warrants with an expiry term of five years.  The Company  expensed
     this additional non-cash stock based compensation  expense relating to this
     modification for $5,508. The fair value of each option used for the purpose
     of estimating the stock  compensation is calculated using the Black-Scholes
     option pricing model with the following weighted average assumptions:

            Risk free rate                                            3.25%
            Expected dividends                                           0%
            Forfeiture rate                                              0%
            Volatility                                              189.42%
            Stock-based compensation cost expensed                  $5,508

     As of November 30, 2010 there was $Nil of  unrecognized  expense related to
     non-vested stock-based compensation arrangements granted.

     Three months ended February 28, 2011

     The Company did not issue any options  during the three month  period ended
     February 28, 2011.

7. STOCK PURCHASE WARRANTS

     Year ended November 30, 2010

     On  October  1,  2010,  the Board  cancelled  725,000  options  issued to a
     director  having an  exercise  price of $0.25 per  share  and  expiring  on
     various  dates  ranging from October 29, 2011 to January 4, 2015 and issued
     warrants to acquire  397,000  common shares  exercisable at $0.20 per share
     with an  expiry  term of five  years  and  500,000  common  shares  in lieu
     thereof.

     On  October  1,  2010,  the Board  cancelled  400,000  options  issued to a
     director  having an  exercise  price of $0.25 per  share  and  expiring  on
     various  dates  ranging  from  October 29, 2011 to June 30, 2014 and issued
     warrants to acquire  50,000  common shares  exercisable  at $0.20 per share
     with an expiry term of five years and 50,000 common shares in lieu thereof.

                                       13



SECURITY DEVICES INTERNATIONAL, INC
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

7. STOCK PURCHASE WARRANTS-Cont'd

     On  October 1,  2010,  the Board  cancelled  175,000  options  issued to an
     officer  having an exercise  price of $0.25 per share and  expiring on June
     30, 2014 and issued warrants to acquire  175,000 common shares  exercisable
     at $0.20 per share with an expiry term of five years.

     On October 1, 2010, the Board cancelled 300,000 options each for a total of
     600,000 options issued to two consultants having an exercise price of $0.25
     per share and  expiring  on June 30,  2014 and issued  warrants  to each to
     acquire 300,000 common shares exercisable at $0.20 per share for a total of
     600,000 warrants with an expiry term of five years.

     Three months ended February 28, 2011

     The  Company  did not issue any stock  purchase  warrants  during the three
     month period ended February 28, 2011.

8. RELATED PARTY TRANSACTIONS

     The Company  expensed a total of $25,000 as  Management  fee for payment to
     its two directors for the three month period ended February 28, 2011.

     The Company expensed $3,500 for services provided by the CFO of the Company
     and $24,000 for services provided by COO of the Company.

9. COMMITMENTS

     a) Effective January 1, 2011, a director of the Company renewed  consulting
        agreement with the Company on the following terms:

                                         Monthly
                                     Consulting Fees          Expiration of
                                   from January through         Consulting
         Name                         December 2011             Agreement
         ----                         -------------             ---------

         Boaz Dor                        $3,000                  12-31-2011

                                       14


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

9.    COMMITMENTS-Cont'd

  b) On  November  30,  2009,  the  Company  entered  into  a  Memorandum  of
     Understanding  ("MOU") with its research and development service contractor
     ("the contractor").  This MOU covers various alternatives to the Company to
     settle the  liability  to the  contractor  in the amount of  $658,932 as at
     November 30, 2009.  Should the Company  become  insolvent,  or is unable to
     continue  operations,  or is unable to pay the  contractor  pursuant to the
     MOU,  then  it  will  grant  the  contractor  an  exclusive,   irrevocable,
     worldwide, assignable, sub licensable, perpetual license to further develop
     and to market  the  Company's  electric  bullet  (WEP40)  and blunt  impact
     (BIP40)  technology.  The Company will  negotiate a royalty in the event of
     granting such rights to the contractor.  The Company  terminated  their MOU
     with the  contractor  during the quarter ended  February 28, 2011 and is in
     the midst of negotiating with the contractor for future services.

  c) The Company has  commitments  for leasing  office  premises in Oakville,
     Ontario,  Canada  to  September  30,  2012  at a  monthly  rent  (excluding
     proportionate  realty and  maintenance  costs and taxes) of Canadian $2,500
     per month.

  d) The Company  signed a consulting  agreement  with the COO of the Company
     for a period of six months commencing November 1, 2010. The officer will be
     paid $8,000 plus applicable taxes.

  e) The Company  signed an agreement with a company to develop an Instructor
     and Operator Training course for its line of  less-than-lethal  rounds at a
     total  commitment of $40,000.  The Company has already paid $30,000  during
     the quarter ended February 28, 2011.

10. SUBSEQUENT EVENTS

     Subsequent to the quarter the Company raised  proceeds of $100,000 by issue
     of  convertible  debentures  which carry an interest  rate of 10% per annum
     compounded annually. The term of the debenture is for a period of 12 months
     ending on March 23, 2012. The debenture is convertible at any time while it
     remains  outstanding,  as to both principal and interest,  at the option of
     the  debenture  holder to convert  into fully  paid  non-assessable  common
     shares in the  capital  of the  Company  at  Canadian  $0.20 per share (the
     "Conversion  Price").  In  addition  to any  payment  made  on  account  of
     Principal  due on  maturity or any  prepayment  of  principal,  the Company
     shall, as an additional capital payment,  issue to the Debenture holders as
     fully paid and  non-assessable  shares that number of common  shares in the
     capital of the  Company  ("the  "Common  Shares") as is equal to 20% of the
     Principal  amount paid at such time to such Debenture holder divided by the
     then applicable Conversion Price or 20% x Principal Amount  paid/Conversion
     Price.

                                       15


SECURITY DEVICES INTERNATIONAL, INC.
(A Development Stage Enterprise)
Condensed Notes to Interim Financial Statements
February 28, 2011
(Amounts expressed in US Dollars)
(Unaudited-Prepared by Management)

10. SUBSEQUENT EVENTS

     The Company has signed a Memorandum  of  Understanding  (MOU) with a large,
     global defense technology company.  The MOU maps out the intentions of both
     groups to move forward in having SDI's 40mm Blunt Impact  ammunition  round
     manufactured at their facility.  A further  definitive  business  agreement
     will need to be executed  further defining the parties' roles. The proposed
     arrangement  will  enable SDI to produce and market  their next  generation
     less-than-lethal   ammunition   products  through  this  Company  at  their
     production  facility in the United States.  The MOU represents  SDI's first
     step  in  entering  the  marketplace  both  internationally,  and in  North
     America.

                                       16


                                     PART I

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
         AND PLAN OF OPERATION

     SDI is a less-than-lethal  defense technology company,  specializing in the
development of innovative next generation solutions for security situations that
do not require the use of lethal force,  or ammunition.  SDI is currently in the
advanced  stages of deploying  their patent  pending  family of products.  These
products consist of; the Blunt Impact Projectile 40mm (BIP40),  and the Wireless
Electric Projectile 40mm (WEP40). The market sectors for these products include;
the military,  army, navy, air force,  peacekeeping,  homeland security, and law
enforcement professionals. SDI's products were designed for use in existing 40mm
launchers.

     The BIP40 is a direct impact  less-than-lethal  ammunition round. Developed
to respond to the increasing demand for security solutions in circumstances that
do not  require  lethal  force  to  control.  Patented  technologies  allow  for
operational  effectiveness  at  distances  of up to  metricconverterProductID262
feet262 feet (80m),  while still  enhancing  target safety if engaged from close
range.

     The  BIP40  operates  with  smokeless  powder  as  a  propellant,  ensuring
consistent velocity and accuracy at long distances.  The head of the round has a
collapsible nose which absorbs the kinetic energy upon impact. The Company holds
a global patent for the collapsible nose.

     Designed to supersede  previous blunt impact solutions such as foam, baton,
sponge and rubber  bullets,  the BIP40's  technology  enables the  projectile to
engage the target with higher  kinetic energy while meeting  official,  military
standard requirements.

     The  WEP40  is an  industry  leading  electric  ammunition  round  that was
developed to answer the growing need for an effective,  extended  range electric
incapacitation  solution  for  situations  that do not require the use of lethal
force to control.  Incorporating  SDI's  patent-pending  technologies allows for
this  ammunition  round  to  deliver  operational  success  at  distances  up to
metricconverterProductID160 feet160 feet (50m).

     The market sectors for these products  include;  the military,  army, navy,
air force,  peacekeeping,  homeland security, and law enforcement professionals.
The WEP40 when  deployed  emits a  Wireless  Electro  Neuro-Muscular  Disruption
Technology that  incapacitates the targeted  individual.  The Company's products
were designed for a standard 40mm ammunition casing, for use with standard issue
weapons such as riot guns and M203 grenade launchers.

     SDI has  terminated its agreement  with Elad  Engineering of Israel,  dated
November  30,  2009 and is in the midst of  negotiating  a new  arrangement  for
future services with this company.

Subsequent  to  February  28,  2011,  the  Company  has signed a  Memorandum  of
Understanding  (MOU) with a large,  global defense technology  company.  The MOU
maps out the  intentions  of both  groups to move  forward in having  SDI's 40mm
Blunt Impact ammunition round manufactured at the facility of the global defense
technology  company.  A further  definitive  business  agreement will need to be
executed  further  defining the parties' roles.  The proposed  arrangement  will
enable SDI to produce and market its next generation less-than-lethal ammunition

                                       2


products  through  this  production  facility  in the  United  States.  The  MOU
represents SDI's first step in entering the marketplace both internationally and
in North America.


     Commencing June 2010, new management was put in place to administer the day
to day  operations  of SDI with an aim to build the  company  to a point that an
effective  partnership with a large defense technology company could be executed
and to reduce the monthly expenses of the company and provide responsible fiscal
over sight to the company.

     Two new  directors  were  appointed  to the board of  directors;  Mr. Harry
Walters, with an extensive history working with the United States Government and
the  Pentagon,  brings  excellent  insight  into the United  States  Military to
further SDI's forward momentum with the United States Dept. of defense,  and Mr.
Patrick Bryan who brings an extensive background in business as well as Military
service and  managing a modern  weapons  company  that dealt with United  States
Government agencies, both Military and civilian.

     The Company  appointed members of the board to serve on the audit committee
to oversee financial statements once completed.

     The Company  appointed a Chief  operating  Officer to assist the  President
with the day to day operations of the company.

     The Company  contracted  Level 4 Capital Corp. to assist with the financial
strategy  of SDI  during  this  fiscal  2010 and to work with the  Company  with
restructurings, contract negotiations, and operational issues.

     The Company  joined the  Association of the United States Army and attended
their annual conference in October m2010 in Washington,  D.C. At the conference,
SDI was shown interest by two large defense technology companies,  and is now in
advanced  stage   discussions  with  them  to  form  a  proposed   manufacturing
arrangement with at least one of them.

     The Company opened a US office in Washington DC to accommodate the large US
military presence.

     SDI was  incorporated on March 1, 2005 and for the period from inception to
February 28, 2011 has not generated any revenue.

     During the three months ended February 28, 2011:

         o  Research and product development expenses were substantially lower
            since the development of the Company's products was nearing
            completion.


         o  General and administrative expenses declined during the current
            quarter as compared to the prior quarter as the Company did not
            issue any options or warrants during the quarter and did not record
            any stock based compensation expense. During the prior quarter the
            Company recorded stock based compensation expense of $93,493.

                                       3


     During the period from inception  (March 1, 2005) through November 30, 2010
SDI's operations used $9,746,307 in cash. During this period SDI:



          o  purchased $58,773 of equipment; and

          o  raised $9,876,650 (net) from the sale of shares of its common stock
             and exercise of options from its officers and directors.


     SDI anticipates that its capital  requirements for the twelve-month  period
ending February 28, 2012 will be:

      Development and Production costs              $120,000
      General and Administrative Expenses            576,000
                                                   ---------
                  Total                             $696,000
                                                   =========

     Other than the foregoing,  SDI did not have any material future contractual
obligations or off balance sheet arrangements as of February 28, 2011.

     SDI does not have any  commitments  or  arrangements  from any  persons  to
provide SDI with any additional  capital it may need. Without additional capital
SDI will  not be able to fund  its  anticipated  capital  requirements  outlined
above.

     See Note 10 to the financial statements included as part of this report for
information concerning events which occurred subsequent to February 28, 2011.

                                       4


Item 4.     Controls and Procedures.

     (a) SDI  maintains a system of controls and  procedures  designed to ensure
that  information  required to be disclosed in reports filed or submitted  under
the  Securities  Exchange Act of 1934,  as amended  ("1934  Act"),  is recorded,
processed,  summarized and reported,  within time periods specified in the SEC's
rules and forms and to ensure that  information  required to be disclosed by SDI
in the reports that it files or submits under the 1934 Act, is  accumulated  and
communicated to SDI's management,  including its Principal Executive Officer and
Principal  Financial Officer, as appropriate to allow timely decisions regarding
required disclosure.  As of February 28, 2011, SDI's Principal Executive Officer
and Principal  Financial  Officer  evaluated the effectiveness of the design and
operation of SDI's disclosure controls and procedures. Based on that evaluation,
SDI's Principal Executive Officer and Principal Financial Officer concluded that
SDI's disclosure controls and procedures were effective.

     (b) Changes in Internal  Controls.  There were no changes in SDI's internal
control over  financial  reporting  during the quarter ended  February 28, 2011,
that materially  affected,  or are reasonably likely to materially  affect,  its
internal control over financial reporting.

                                       5


                                     PART II

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds

     Not applicable.


Item 6.  Exhibits

Exhibits

  31.1            Certification   pursuant   to   Section   302  of  the
                  Sarbanes-Oxley Act of 2002 for Gregory Sullivan.

  31.2            Certification   pursuant   to   Section   302  of  the
                  Sarbanes-Oxley Act of 2002 for Rakesh Malhotra.

  32              Certification   pursuant   to   Section   906  of  the
                  Sarbanes-Oxley Act of 2002 for Gregory Sullivan and Rakesh
                  Malhotra.

                                       6



                                   SIGNATURES


     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                                      SECURITY DEVICES INTERNATIONAL, INC.

Date:  April 13, 2011
                                      By: /s/ Gregory Sullivan
                                          -----------------------------------
                                          Gregory Sullivan, President
                                          and Principal Executive
                                          Officer



Date:  April 13, 2011
                                      By:
                                          -----------------------------------
                                          Rakesh Malhotra, Principal
                                          Financial and Accounting
                                          Officer


                                       7